From 28f550939a8eb254aef6988c643c274f43fbb166 Mon Sep 17 00:00:00 2001
From: Diogo Sousa <dsousa@cloudflare.com>
Date: Wed, 28 Oct 2026 14:06:18 +0000
Subject: [PATCH] Restore the tree construction tests used by the feedback
 tests.

The html5lib-tests submodule update in f3093c9 moved to a revision without the `tree-construction`
directory, since those tests are now maintained in web-platform-tests (WPT). Because
`for_each_test_file()` accepted an empty glob, the feedback tests silently went from 1,809 inputs
to the 31 in `tests/data/regression/`, and CI stayed green.

We now keep a copy of the tests in `tests/data/tree-construction/`, taken from html5lib-tests
9329e64 (the last revision before they were removed), and `for_each_test_file()` fails when nothing
matches.

The current WPT version of these tests has five inputs with CDATA sections inside SVG/MathML
integration points (e.g. `<svg><title><![CDATA[x]]>`) that we tokenize as bogus comments, so
switching to it needs a fix first.
---
 .gitattributes                                |    3 +
 tests/data/tree-construction/README.md        |   25 +
 tests/data/tree-construction/adoption01.dat   |  354 +++
 tests/data/tree-construction/adoption02.dat   |   56 +
 tests/data/tree-construction/blocks.dat       |  695 +++++
 tests/data/tree-construction/comments01.dat   |  217 ++
 tests/data/tree-construction/doctype01.dat    |  474 +++
 tests/data/tree-construction/domjs-unsafe.dat |  Bin 0 -> 10356 bytes
 tests/data/tree-construction/entities01.dat   |  943 ++++++
 tests/data/tree-construction/entities02.dat   |  309 ++
 .../tree-construction/foreign-fragment.dat    |  645 ++++
 .../data/tree-construction/html5test-com.dat  |  301 ++
 tests/data/tree-construction/inbody01.dat     |   54 +
 tests/data/tree-construction/isindex.dat      |   49 +
 tests/data/tree-construction/main-element.dat |   46 +
 tests/data/tree-construction/math.dat         |  104 +
 .../tree-construction/menuitem-element.dat    |  241 ++
 .../namespace-sensitivity.dat                 |   22 +
 tests/data/tree-construction/noscript01.dat   |  237 ++
 ...pending-spec-changes-plain-text-unsafe.dat |  Bin 0 -> 927 bytes
 .../pending-spec-changes.dat                  |   46 +
 .../tree-construction/plain-text-unsafe.dat   |  Bin 0 -> 9486 bytes
 tests/data/tree-construction/quirks01.dat     |   53 +
 tests/data/tree-construction/ruby.dat         |  302 ++
 tests/data/tree-construction/scriptdata01.dat |  372 +++
 .../data/tree-construction/search-element.dat |   46 +
 tests/data/tree-construction/svg.dat          |  104 +
 tests/data/tree-construction/tables01.dat     |  323 ++
 tests/data/tree-construction/template.dat     | 1673 +++++++++++
 tests/data/tree-construction/tests1.dat       | 1958 +++++++++++++
 tests/data/tree-construction/tests10.dat      |  853 ++++++
 tests/data/tree-construction/tests11.dat      |  523 ++++
 tests/data/tree-construction/tests12.dat      |   62 +
 tests/data/tree-construction/tests14.dat      |   75 +
 tests/data/tree-construction/tests15.dat      |  216 ++
 tests/data/tree-construction/tests16.dat      | 2602 +++++++++++++++++
 tests/data/tree-construction/tests17.dat      |  177 ++
 tests/data/tree-construction/tests18.dat      |  572 ++++
 tests/data/tree-construction/tests19.dat      | 1398 +++++++++
 tests/data/tree-construction/tests2.dat       |  831 ++++++
 tests/data/tree-construction/tests20.dat      |  842 ++++++
 tests/data/tree-construction/tests21.dat      |  306 ++
 tests/data/tree-construction/tests22.dat      |  190 ++
 tests/data/tree-construction/tests23.dat      |  168 ++
 tests/data/tree-construction/tests24.dat      |   79 +
 tests/data/tree-construction/tests25.dat      |  288 ++
 tests/data/tree-construction/tests26.dat      |  453 +++
 tests/data/tree-construction/tests3.dat       |  305 ++
 tests/data/tree-construction/tests4.dat       |   74 +
 tests/data/tree-construction/tests5.dat       |  210 ++
 tests/data/tree-construction/tests6.dat       |  663 +++++
 tests/data/tree-construction/tests7.dat       |  453 +++
 tests/data/tree-construction/tests8.dat       |  165 ++
 tests/data/tree-construction/tests9.dat       |  482 +++
 .../tree-construction/tests_innerHTML_1.dat   |  844 ++++++
 tests/data/tree-construction/tricky01.dat     |  336 +++
 .../tree-construction/void-in-phrasing.dat    |  151 +
 tests/data/tree-construction/webkit01.dat     |  783 +++++
 tests/data/tree-construction/webkit02.dat     |  775 +++++
 .../html5lib_tests/feedback_tests/mod.rs      |    2 +-
 tests/harness/suites/mod.rs                   |    9 +-
 61 files changed, 24537 insertions(+), 2 deletions(-)
 create mode 100644 tests/data/tree-construction/README.md
 create mode 100644 tests/data/tree-construction/adoption01.dat
 create mode 100644 tests/data/tree-construction/adoption02.dat
 create mode 100644 tests/data/tree-construction/blocks.dat
 create mode 100644 tests/data/tree-construction/comments01.dat
 create mode 100644 tests/data/tree-construction/doctype01.dat
 create mode 100644 tests/data/tree-construction/domjs-unsafe.dat
 create mode 100644 tests/data/tree-construction/entities01.dat
 create mode 100644 tests/data/tree-construction/entities02.dat
 create mode 100644 tests/data/tree-construction/foreign-fragment.dat
 create mode 100644 tests/data/tree-construction/html5test-com.dat
 create mode 100644 tests/data/tree-construction/inbody01.dat
 create mode 100644 tests/data/tree-construction/isindex.dat
 create mode 100644 tests/data/tree-construction/main-element.dat
 create mode 100644 tests/data/tree-construction/math.dat
 create mode 100644 tests/data/tree-construction/menuitem-element.dat
 create mode 100644 tests/data/tree-construction/namespace-sensitivity.dat
 create mode 100644 tests/data/tree-construction/noscript01.dat
 create mode 100644 tests/data/tree-construction/pending-spec-changes-plain-text-unsafe.dat
 create mode 100644 tests/data/tree-construction/pending-spec-changes.dat
 create mode 100644 tests/data/tree-construction/plain-text-unsafe.dat
 create mode 100644 tests/data/tree-construction/quirks01.dat
 create mode 100644 tests/data/tree-construction/ruby.dat
 create mode 100644 tests/data/tree-construction/scriptdata01.dat
 create mode 100644 tests/data/tree-construction/search-element.dat
 create mode 100644 tests/data/tree-construction/svg.dat
 create mode 100644 tests/data/tree-construction/tables01.dat
 create mode 100644 tests/data/tree-construction/template.dat
 create mode 100644 tests/data/tree-construction/tests1.dat
 create mode 100644 tests/data/tree-construction/tests10.dat
 create mode 100644 tests/data/tree-construction/tests11.dat
 create mode 100644 tests/data/tree-construction/tests12.dat
 create mode 100644 tests/data/tree-construction/tests14.dat
 create mode 100644 tests/data/tree-construction/tests15.dat
 create mode 100644 tests/data/tree-construction/tests16.dat
 create mode 100644 tests/data/tree-construction/tests17.dat
 create mode 100644 tests/data/tree-construction/tests18.dat
 create mode 100644 tests/data/tree-construction/tests19.dat
 create mode 100644 tests/data/tree-construction/tests2.dat
 create mode 100644 tests/data/tree-construction/tests20.dat
 create mode 100644 tests/data/tree-construction/tests21.dat
 create mode 100644 tests/data/tree-construction/tests22.dat
 create mode 100644 tests/data/tree-construction/tests23.dat
 create mode 100644 tests/data/tree-construction/tests24.dat
 create mode 100644 tests/data/tree-construction/tests25.dat
 create mode 100644 tests/data/tree-construction/tests26.dat
 create mode 100644 tests/data/tree-construction/tests3.dat
 create mode 100644 tests/data/tree-construction/tests4.dat
 create mode 100644 tests/data/tree-construction/tests5.dat
 create mode 100644 tests/data/tree-construction/tests6.dat
 create mode 100644 tests/data/tree-construction/tests7.dat
 create mode 100644 tests/data/tree-construction/tests8.dat
 create mode 100644 tests/data/tree-construction/tests9.dat
 create mode 100644 tests/data/tree-construction/tests_innerHTML_1.dat
 create mode 100644 tests/data/tree-construction/tricky01.dat
 create mode 100644 tests/data/tree-construction/void-in-phrasing.dat
 create mode 100644 tests/data/tree-construction/webkit01.dat
 create mode 100644 tests/data/tree-construction/webkit02.dat

diff --git a/.gitattributes b/.gitattributes
index 6f479225..24a0444d 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -3,3 +3,6 @@
 tests/data/** linguist-vendored
 benches/data/** linguist-vendored
 fuzz/corpus/** linguist-vendored
+
+# Keep the tree construction tests byte-for-byte: some of them contain CR characters.
+tests/data/tree-construction/*.dat -text diff
diff --git a/tests/data/tree-construction/README.md b/tests/data/tree-construction/README.md
new file mode 100644
index 00000000..7dbe7864
--- /dev/null
+++ b/tests/data/tree-construction/README.md
@@ -0,0 +1,25 @@
+# Tree construction tests
+
+These are the html5lib tree construction tests, copied from [html5lib-tests][html5lib-tests] at
+revision `9329e64694e7835d0dcff9811e22856ef6ad16f9`, the last one before they were removed from
+that repository. They are now maintained in [web-platform-tests][wpt] (WPT).
+
+We only use the inputs (the `#data` sections): the feedback tests compare our tokens against the
+ones html5ever produces for the same input. The scripted tests are not included (`scripted/` in
+html5lib-tests, `scripted_*.dat` in WPT), since they require script execution.
+
+To replace the files with the ones from WPT revision `$rev`, run this from the root of the
+repository (and update the source revision above):
+
+```sh
+url=https://raw.githubusercontent.com/web-platform-tests/wpt/$rev/html/syntax/parsing/resources
+rm tests/data/tree-construction/*.dat
+gh api "repos/web-platform-tests/wpt/contents/html/syntax/parsing/resources?ref=$rev" \
+    --jq '.[].name | select(endswith(".dat") and (startswith("scripted_") | not))' |
+    while read -r name; do
+        curl -sSfLo "tests/data/tree-construction/$name" "$url/$name"
+    done
+```
+
+[html5lib-tests]: https://github.com/html5lib/html5lib-tests
+[wpt]: https://github.com/web-platform-tests/wpt/tree/master/html/syntax/parsing/resources
diff --git a/tests/data/tree-construction/adoption01.dat b/tests/data/tree-construction/adoption01.dat
new file mode 100644
index 00000000..38f98efd
--- /dev/null
+++ b/tests/data/tree-construction/adoption01.dat
@@ -0,0 +1,354 @@
+#data
+<a><p></a></p>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,10): adoption-agency-1.3
+#document
+| <html>
+|   <head>
+|   <body>
+|     <a>
+|     <p>
+|       <a>
+
+#data
+<a>1<p>2</a>3</p>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,12): adoption-agency-1.3
+#document
+| <html>
+|   <head>
+|   <body>
+|     <a>
+|       "1"
+|     <p>
+|       <a>
+|         "2"
+|       "3"
+
+#data
+<a>1<button>2</a>3</button>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,17): adoption-agency-1.3
+#document
+| <html>
+|   <head>
+|   <body>
+|     <a>
+|       "1"
+|     <button>
+|       <a>
+|         "2"
+|       "3"
+
+#data
+<a>1<b>2</a>3</b>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,12): adoption-agency-1.3
+#document
+| <html>
+|   <head>
+|   <body>
+|     <a>
+|       "1"
+|       <b>
+|         "2"
+|     <b>
+|       "3"
+
+#data
+<a>1<div>2<div>3</a>4</div>5</div>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,20): adoption-agency-1.3
+(1,20): adoption-agency-1.3
+#document
+| <html>
+|   <head>
+|   <body>
+|     <a>
+|       "1"
+|     <div>
+|       <a>
+|         "2"
+|       <div>
+|         <a>
+|           "3"
+|         "4"
+|       "5"
+
+#data
+<table><a>1<p>2</a>3</p>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,10): unexpected-start-tag-implies-table-voodoo
+(1,11): unexpected-character-implies-table-voodoo
+(1,14): unexpected-start-tag-implies-table-voodoo
+(1,15): unexpected-character-implies-table-voodoo
+(1,19): unexpected-end-tag-implies-table-voodoo
+(1,19): adoption-agency-1.3
+(1,20): unexpected-character-implies-table-voodoo
+(1,24): unexpected-end-tag-implies-table-voodoo
+(1,24): eof-in-table
+#document
+| <html>
+|   <head>
+|   <body>
+|     <a>
+|       "1"
+|     <p>
+|       <a>
+|         "2"
+|       "3"
+|     <table>
+
+#data
+<b><b><a><p></a>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,16): adoption-agency-1.3
+(1,16): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <b>
+|       <b>
+|         <a>
+|         <p>
+|           <a>
+
+#data
+<b><a><b><p></a>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,16): adoption-agency-1.3
+(1,16): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <b>
+|       <a>
+|         <b>
+|       <b>
+|         <p>
+|           <a>
+
+#data
+<a><b><b><p></a>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,16): adoption-agency-1.3
+(1,16): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <a>
+|       <b>
+|         <b>
+|     <b>
+|       <b>
+|         <p>
+|           <a>
+
+#data
+<p>1<s id="A">2<b id="B">3</p>4</s>5</b>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,30): unexpected-end-tag
+(1,35): adoption-agency-1.3
+#document
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       "1"
+|       <s>
+|         id="A"
+|         "2"
+|         <b>
+|           id="B"
+|           "3"
+|     <s>
+|       id="A"
+|       <b>
+|         id="B"
+|         "4"
+|     <b>
+|       id="B"
+|       "5"
+
+#data
+<table><a>1<td>2</td>3</table>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,10): unexpected-start-tag-implies-table-voodoo
+(1,11): unexpected-character-implies-table-voodoo
+(1,15): unexpected-cell-in-table-body
+(1,30): unexpected-implied-end-tag-in-table-view
+#document
+| <html>
+|   <head>
+|   <body>
+|     <a>
+|       "1"
+|     <a>
+|       "3"
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             "2"
+
+#data
+<table>A<td>B</td>C</table>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,8): unexpected-character-implies-table-voodoo
+(1,12): unexpected-cell-in-table-body
+(1,22): unexpected-character-implies-table-voodoo
+#document
+| <html>
+|   <head>
+|   <body>
+|     "AC"
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             "B"
+
+#data
+<a><svg><tr><input></a>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,23): unexpected-end-tag
+(1,23): adoption-agency-1.3
+#document
+| <html>
+|   <head>
+|   <body>
+|     <a>
+|       <svg svg>
+|         <svg tr>
+|           <svg input>
+
+#data
+<div><a><b><div><div><div><div><div><div><div><div><div><div></a>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,65): adoption-agency-1.3
+(1,65): adoption-agency-1.3
+(1,65): adoption-agency-1.3
+(1,65): adoption-agency-1.3
+(1,65): adoption-agency-1.3
+(1,65): adoption-agency-1.3
+(1,65): adoption-agency-1.3
+(1,65): adoption-agency-1.3
+(1,65): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       <a>
+|         <b>
+|       <b>
+|         <div>
+|           <a>
+|           <div>
+|             <a>
+|             <div>
+|               <a>
+|               <div>
+|                 <a>
+|                 <div>
+|                   <a>
+|                   <div>
+|                     <a>
+|                     <div>
+|                       <a>
+|                       <div>
+|                         <a>
+|                           <div>
+|                             <div>
+
+#data
+<div><a><b><u><i><code><div></a>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,32): adoption-agency-1.3
+(1,32): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       <a>
+|         <b>
+|           <u>
+|             <i>
+|               <code>
+|       <u>
+|         <i>
+|           <code>
+|             <div>
+|               <a>
+
+#data
+<b><b><b><b>x</b></b></b></b>y
+#errors
+(1,3): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <b>
+|       <b>
+|         <b>
+|           <b>
+|             "x"
+|     "y"
+
+#data
+<p><b><b><b><b><p>x
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,18): unexpected-end-tag
+(1,19): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <b>
+|         <b>
+|           <b>
+|             <b>
+|     <p>
+|       <b>
+|         <b>
+|           <b>
+|             "x"
+
+#data
+<b><em><foo><foob><fooc><aside></b></em>
+#errors
+(1,35): adoption-agency-1.3
+(1,40): adoption-agency-1.3
+(1,40): expected-closing-tag-but-got-eof
+#document-fragment
+div
+#document
+| <b>
+|   <em>
+|     <foo>
+|       <foob>
+|         <fooc>
+| <aside>
+|   <b>
diff --git a/tests/data/tree-construction/adoption02.dat b/tests/data/tree-construction/adoption02.dat
new file mode 100644
index 00000000..acd38854
--- /dev/null
+++ b/tests/data/tree-construction/adoption02.dat
@@ -0,0 +1,56 @@
+#data
+<b>1<i>2<p>3</b>4
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,16): adoption-agency-1.3
+(1,17): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <b>
+|       "1"
+|       <i>
+|         "2"
+|     <i>
+|       <p>
+|         <b>
+|           "3"
+|         "4"
+
+#data
+<a><div><style></style><address><a>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,35): unexpected-start-tag-implies-end-tag
+(1,35): adoption-agency-1.3
+(1,35): adoption-agency-1.3
+(1,35): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <a>
+|     <div>
+|       <a>
+|         <style>
+|       <address>
+|         <a>
+|         <a>
+
+#data
+<nobr><table><marquee></table><nobr>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,22): unexpected-start-tag-implies-table-voodoo
+(1,30): end-tag-too-early-named
+(1,36): unexpected-start-tag-implies-end-tag
+(1,36): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <nobr>
+|       <marquee>
+|       <table>
+|     <nobr>
diff --git a/tests/data/tree-construction/blocks.dat b/tests/data/tree-construction/blocks.dat
new file mode 100644
index 00000000..a1a9c752
--- /dev/null
+++ b/tests/data/tree-construction/blocks.dat
@@ -0,0 +1,695 @@
+#data
+<!doctype html><p>foo<address>bar<p>baz
+#errors
+(1,39): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       "foo"
+|     <address>
+|       "bar"
+|       <p>
+|         "baz"
+
+#data
+<!doctype html><address><p>foo</address>bar
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <address>
+|       <p>
+|         "foo"
+|     "bar"
+
+#data
+<!doctype html><p>foo<article>bar<p>baz
+#errors
+(1,39): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       "foo"
+|     <article>
+|       "bar"
+|       <p>
+|         "baz"
+
+#data
+<!doctype html><article><p>foo</article>bar
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <article>
+|       <p>
+|         "foo"
+|     "bar"
+
+#data
+<!doctype html><p>foo<aside>bar<p>baz
+#errors
+(1,37): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       "foo"
+|     <aside>
+|       "bar"
+|       <p>
+|         "baz"
+
+#data
+<!doctype html><aside><p>foo</aside>bar
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <aside>
+|       <p>
+|         "foo"
+|     "bar"
+
+#data
+<!doctype html><p>foo<blockquote>bar<p>baz
+#errors
+(1,42): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       "foo"
+|     <blockquote>
+|       "bar"
+|       <p>
+|         "baz"
+
+#data
+<!doctype html><blockquote><p>foo</blockquote>bar
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <blockquote>
+|       <p>
+|         "foo"
+|     "bar"
+
+#data
+<!doctype html><p>foo<center>bar<p>baz
+#errors
+(1,38): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       "foo"
+|     <center>
+|       "bar"
+|       <p>
+|         "baz"
+
+#data
+<!doctype html><center><p>foo</center>bar
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <center>
+|       <p>
+|         "foo"
+|     "bar"
+
+#data
+<!doctype html><p>foo<details>bar<p>baz
+#errors
+(1,39): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       "foo"
+|     <details>
+|       "bar"
+|       <p>
+|         "baz"
+
+#data
+<!doctype html><details><p>foo</details>bar
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <details>
+|       <p>
+|         "foo"
+|     "bar"
+
+#data
+<!doctype html><p>foo<dialog>bar<p>baz
+#errors
+(1,38): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       "foo"
+|     <dialog>
+|       "bar"
+|       <p>
+|         "baz"
+
+#data
+<!doctype html><dialog><p>foo</dialog>bar
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <dialog>
+|       <p>
+|         "foo"
+|     "bar"
+
+#data
+<!doctype html><p>foo<dir>bar<p>baz
+#errors
+(1,35): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       "foo"
+|     <dir>
+|       "bar"
+|       <p>
+|         "baz"
+
+#data
+<!doctype html><dir><p>foo</dir>bar
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <dir>
+|       <p>
+|         "foo"
+|     "bar"
+
+#data
+<!doctype html><p>foo<div>bar<p>baz
+#errors
+(1,35): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       "foo"
+|     <div>
+|       "bar"
+|       <p>
+|         "baz"
+
+#data
+<!doctype html><div><p>foo</div>bar
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       <p>
+|         "foo"
+|     "bar"
+
+#data
+<!doctype html><p>foo<dl>bar<p>baz
+#errors
+(1,34): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       "foo"
+|     <dl>
+|       "bar"
+|       <p>
+|         "baz"
+
+#data
+<!doctype html><dl><p>foo</dl>bar
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <dl>
+|       <p>
+|         "foo"
+|     "bar"
+
+#data
+<!doctype html><p>foo<fieldset>bar<p>baz
+#errors
+(1,40): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       "foo"
+|     <fieldset>
+|       "bar"
+|       <p>
+|         "baz"
+
+#data
+<!doctype html><fieldset><p>foo</fieldset>bar
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <fieldset>
+|       <p>
+|         "foo"
+|     "bar"
+
+#data
+<!doctype html><p>foo<figcaption>bar<p>baz
+#errors
+(1,42): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       "foo"
+|     <figcaption>
+|       "bar"
+|       <p>
+|         "baz"
+
+#data
+<!doctype html><figcaption><p>foo</figcaption>bar
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <figcaption>
+|       <p>
+|         "foo"
+|     "bar"
+
+#data
+<!doctype html><p>foo<figure>bar<p>baz
+#errors
+(1,38): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       "foo"
+|     <figure>
+|       "bar"
+|       <p>
+|         "baz"
+
+#data
+<!doctype html><figure><p>foo</figure>bar
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <figure>
+|       <p>
+|         "foo"
+|     "bar"
+
+#data
+<!doctype html><p>foo<footer>bar<p>baz
+#errors
+(1,38): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       "foo"
+|     <footer>
+|       "bar"
+|       <p>
+|         "baz"
+
+#data
+<!doctype html><footer><p>foo</footer>bar
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <footer>
+|       <p>
+|         "foo"
+|     "bar"
+
+#data
+<!doctype html><p>foo<header>bar<p>baz
+#errors
+(1,38): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       "foo"
+|     <header>
+|       "bar"
+|       <p>
+|         "baz"
+
+#data
+<!doctype html><header><p>foo</header>bar
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <header>
+|       <p>
+|         "foo"
+|     "bar"
+
+#data
+<!doctype html><p>foo<hgroup>bar<p>baz
+#errors
+(1,38): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       "foo"
+|     <hgroup>
+|       "bar"
+|       <p>
+|         "baz"
+
+#data
+<!doctype html><hgroup><p>foo</hgroup>bar
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <hgroup>
+|       <p>
+|         "foo"
+|     "bar"
+
+#data
+<!doctype html><p>foo<listing>bar<p>baz
+#errors
+(1,39): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       "foo"
+|     <listing>
+|       "bar"
+|       <p>
+|         "baz"
+
+#data
+<!doctype html><listing><p>foo</listing>bar
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <listing>
+|       <p>
+|         "foo"
+|     "bar"
+
+#data
+<!doctype html><p>foo<menu>bar<p>baz
+#errors
+(1,36): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       "foo"
+|     <menu>
+|       "bar"
+|       <p>
+|         "baz"
+
+#data
+<!doctype html><menu><p>foo</menu>bar
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <menu>
+|       <p>
+|         "foo"
+|     "bar"
+
+#data
+<!doctype html><p>foo<nav>bar<p>baz
+#errors
+(1,35): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       "foo"
+|     <nav>
+|       "bar"
+|       <p>
+|         "baz"
+
+#data
+<!doctype html><nav><p>foo</nav>bar
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <nav>
+|       <p>
+|         "foo"
+|     "bar"
+
+#data
+<!doctype html><p>foo<ol>bar<p>baz
+#errors
+(1,34): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       "foo"
+|     <ol>
+|       "bar"
+|       <p>
+|         "baz"
+
+#data
+<!doctype html><ol><p>foo</ol>bar
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <ol>
+|       <p>
+|         "foo"
+|     "bar"
+
+#data
+<!doctype html><p>foo<pre>bar<p>baz
+#errors
+(1,35): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       "foo"
+|     <pre>
+|       "bar"
+|       <p>
+|         "baz"
+
+#data
+<!doctype html><pre><p>foo</pre>bar
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <pre>
+|       <p>
+|         "foo"
+|     "bar"
+
+#data
+<!doctype html><p>foo<section>bar<p>baz
+#errors
+(1,39): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       "foo"
+|     <section>
+|       "bar"
+|       <p>
+|         "baz"
+
+#data
+<!doctype html><section><p>foo</section>bar
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <section>
+|       <p>
+|         "foo"
+|     "bar"
+
+#data
+<!doctype html><p>foo<summary>bar<p>baz
+#errors
+(1,39): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       "foo"
+|     <summary>
+|       "bar"
+|       <p>
+|         "baz"
+
+#data
+<!doctype html><summary><p>foo</summary>bar
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <summary>
+|       <p>
+|         "foo"
+|     "bar"
+
+#data
+<!doctype html><p>foo<ul>bar<p>baz
+#errors
+(1,34): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       "foo"
+|     <ul>
+|       "bar"
+|       <p>
+|         "baz"
+
+#data
+<!doctype html><ul><p>foo</ul>bar
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <ul>
+|       <p>
+|         "foo"
+|     "bar"
diff --git a/tests/data/tree-construction/comments01.dat b/tests/data/tree-construction/comments01.dat
new file mode 100644
index 00000000..4b9ff957
--- /dev/null
+++ b/tests/data/tree-construction/comments01.dat
@@ -0,0 +1,217 @@
+#data
+FOO<!-- BAR -->BAZ
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <!--  BAR  -->
+|     "BAZ"
+
+#data
+FOO<!-- BAR --!>BAZ
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,15): unexpected-bang-after-double-dash-in-comment
+#new-errors
+(1:16) incorrectly-closed-comment
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <!--  BAR  -->
+|     "BAZ"
+
+#data
+FOO<!-- BAR --! >BAZ
+#errors
+(1,3): expected-doctype-but-got-chars
+(1:21) eof-in-comment
+#new-errors
+(1:21) eof-in-comment
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <!--  BAR --! >BAZ -->
+
+#data
+FOO<!-- BAR --!
+>BAZ
+#errors
+(1,3): expected-doctype-but-got-chars
+(2:5) eof-in-comment
+#new-errors
+(2:5) eof-in-comment
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <!--  BAR --!
+>BAZ -->
+
+#data
+FOO<!-- BAR --   >BAZ
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,21): eof-in-comment
+#new-errors
+(1:22) eof-in-comment
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <!--  BAR --   >BAZ -->
+
+#data
+FOO<!-- BAR -- <QUX> -- MUX -->BAZ
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <!--  BAR -- <QUX> -- MUX  -->
+|     "BAZ"
+
+#data
+FOO<!-- BAR -- <QUX> -- MUX --!>BAZ
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,31): unexpected-bang-after-double-dash-in-comment
+#new-errors
+(1:32) incorrectly-closed-comment
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <!--  BAR -- <QUX> -- MUX  -->
+|     "BAZ"
+
+#data
+FOO<!-- BAR -- <QUX> -- MUX -- >BAZ
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,35): eof-in-comment
+#new-errors
+(1:36) eof-in-comment
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <!--  BAR -- <QUX> -- MUX -- >BAZ -->
+
+#data
+FOO<!---->BAZ
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <!--  -->
+|     "BAZ"
+
+#data
+FOO<!--->BAZ
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,9): incorrect-comment
+#new-errors
+(1:9) abrupt-closing-of-empty-comment
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <!--  -->
+|     "BAZ"
+
+#data
+FOO<!-->BAZ
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,8): incorrect-comment
+#new-errors
+(1:8) abrupt-closing-of-empty-comment
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <!--  -->
+|     "BAZ"
+
+#data
+<?xml version="1.0">Hi
+#errors
+(1,1): expected-tag-name-but-got-question-mark
+(1,22): expected-doctype-but-got-chars
+#new-errors
+(1:2) unexpected-question-mark-instead-of-tag-name
+#document
+| <!-- ?xml version="1.0" -->
+| <html>
+|   <head>
+|   <body>
+|     "Hi"
+
+#data
+<?xml version="1.0">
+#errors
+(1,1): expected-tag-name-but-got-question-mark
+(1,20): expected-doctype-but-got-eof
+#new-errors
+(1:2) unexpected-question-mark-instead-of-tag-name
+#document
+| <!-- ?xml version="1.0" -->
+| <html>
+|   <head>
+|   <body>
+
+#data
+<?xml version
+#errors
+(1,1): expected-tag-name-but-got-question-mark
+(1,13): expected-doctype-but-got-eof
+#new-errors
+(1:2) unexpected-question-mark-instead-of-tag-name
+#document
+| <!-- ?xml version -->
+| <html>
+|   <head>
+|   <body>
+
+#data
+FOO<!----->BAZ
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <!-- - -->
+|     "BAZ"
+
+#data
+<html><!-- comment --><title>Comment before head</title>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <!--  comment  -->
+|   <head>
+|     <title>
+|       "Comment before head"
+|   <body>
diff --git a/tests/data/tree-construction/doctype01.dat b/tests/data/tree-construction/doctype01.dat
new file mode 100644
index 00000000..9efdaf70
--- /dev/null
+++ b/tests/data/tree-construction/doctype01.dat
@@ -0,0 +1,474 @@
+#data
+<!DOCTYPE html>Hello
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     "Hello"
+
+#data
+<!dOctYpE HtMl>Hello
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     "Hello"
+
+#data
+<!DOCTYPEhtml>Hello
+#errors
+(1,9): need-space-after-doctype
+#new-errors
+(1:10) missing-whitespace-before-doctype-name
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     "Hello"
+
+#data
+<!DOCTYPE>Hello
+#errors
+(1,10): expected-doctype-name-but-got-right-bracket
+(1,10): unknown-doctype
+#new-errors
+(1:10) missing-doctype-name
+#document
+| <!DOCTYPE >
+| <html>
+|   <head>
+|   <body>
+|     "Hello"
+
+#data
+<!DOCTYPE >Hello
+#errors
+(1,11): expected-doctype-name-but-got-right-bracket
+(1,11): unknown-doctype
+#new-errors
+(1:11) missing-doctype-name
+#document
+| <!DOCTYPE >
+| <html>
+|   <head>
+|   <body>
+|     "Hello"
+
+#data
+<!DOCTYPE potato>Hello
+#errors
+(1,17): unknown-doctype
+#document
+| <!DOCTYPE potato>
+| <html>
+|   <head>
+|   <body>
+|     "Hello"
+
+#data
+<!DOCTYPE potato >Hello
+#errors
+(1,18): unknown-doctype
+#document
+| <!DOCTYPE potato>
+| <html>
+|   <head>
+|   <body>
+|     "Hello"
+
+#data
+<!DOCTYPE potato taco>Hello
+#errors
+(1,17): expected-space-or-right-bracket-in-doctype
+(1,22): unknown-doctype
+#new-errors
+(1:18) invalid-character-sequence-after-doctype-name
+#document
+| <!DOCTYPE potato>
+| <html>
+|   <head>
+|   <body>
+|     "Hello"
+
+#data
+<!DOCTYPE potato taco "ddd>Hello
+#errors
+(1,17): expected-space-or-right-bracket-in-doctype
+(1,27): unknown-doctype
+#new-errors
+(1:18) invalid-character-sequence-after-doctype-name
+#document
+| <!DOCTYPE potato>
+| <html>
+|   <head>
+|   <body>
+|     "Hello"
+
+#data
+<!DOCTYPE potato sYstEM>Hello
+#errors
+(1,24): unexpected-char-in-doctype
+(1,24): unknown-doctype
+#new-errors
+(1:24) missing-doctype-system-identifier
+#document
+| <!DOCTYPE potato>
+| <html>
+|   <head>
+|   <body>
+|     "Hello"
+
+#data
+<!DOCTYPE potato sYstEM    >Hello
+#errors
+(1,28): unexpected-char-in-doctype
+(1,28): unknown-doctype
+#new-errors
+(1:28) missing-doctype-system-identifier
+#document
+| <!DOCTYPE potato>
+| <html>
+|   <head>
+|   <body>
+|     "Hello"
+
+#data
+<!DOCTYPE   potato       sYstEM  ggg>Hello
+#errors
+(1,34): unexpected-char-in-doctype
+(1,37): unknown-doctype
+#new-errors
+(1:34) missing-quote-before-doctype-system-identifier
+#document
+| <!DOCTYPE potato>
+| <html>
+|   <head>
+|   <body>
+|     "Hello"
+
+#data
+<!DOCTYPE potato SYSTEM taco  >Hello
+#errors
+(1,25): unexpected-char-in-doctype
+(1,31): unknown-doctype
+#new-errors
+(1:25) missing-quote-before-doctype-system-identifier
+#document
+| <!DOCTYPE potato>
+| <html>
+|   <head>
+|   <body>
+|     "Hello"
+
+#data
+<!DOCTYPE potato SYSTEM 'taco"'>Hello
+#errors
+(1,32): unknown-doctype
+#document
+| <!DOCTYPE potato "" "taco"">
+| <html>
+|   <head>
+|   <body>
+|     "Hello"
+
+#data
+<!DOCTYPE potato SYSTEM "taco">Hello
+#errors
+(1,31): unknown-doctype
+#document
+| <!DOCTYPE potato "" "taco">
+| <html>
+|   <head>
+|   <body>
+|     "Hello"
+
+#data
+<!DOCTYPE potato SYSTEM "tai'co">Hello
+#errors
+(1,33): unknown-doctype
+#document
+| <!DOCTYPE potato "" "tai'co">
+| <html>
+|   <head>
+|   <body>
+|     "Hello"
+
+#data
+<!DOCTYPE potato SYSTEMtaco "ddd">Hello
+#errors
+(1,24): unexpected-char-in-doctype
+(1,34): unknown-doctype
+#new-errors
+(1:24) missing-quote-before-doctype-system-identifier
+#document
+| <!DOCTYPE potato>
+| <html>
+|   <head>
+|   <body>
+|     "Hello"
+
+#data
+<!DOCTYPE potato grass SYSTEM taco>Hello
+#errors
+(1,17): expected-space-or-right-bracket-in-doctype
+(1,35): unknown-doctype
+#new-errors
+(1:18) invalid-character-sequence-after-doctype-name
+#document
+| <!DOCTYPE potato>
+| <html>
+|   <head>
+|   <body>
+|     "Hello"
+
+#data
+<!DOCTYPE potato pUbLIc>Hello
+#errors
+(1,24): unexpected-end-of-doctype
+(1,24): unknown-doctype
+#new-errors
+(1:24) missing-doctype-public-identifier
+#document
+| <!DOCTYPE potato>
+| <html>
+|   <head>
+|   <body>
+|     "Hello"
+
+#data
+<!DOCTYPE potato pUbLIc >Hello
+#errors
+(1,25): unexpected-end-of-doctype
+(1,25): unknown-doctype
+#new-errors
+(1:25) missing-doctype-public-identifier
+#document
+| <!DOCTYPE potato>
+| <html>
+|   <head>
+|   <body>
+|     "Hello"
+
+#data
+<!DOCTYPE potato pUbLIcgoof>Hello
+#errors
+(1,24): unexpected-char-in-doctype
+(1,28): unknown-doctype
+#new-errors
+(1:24) missing-quote-before-doctype-public-identifier
+#document
+| <!DOCTYPE potato>
+| <html>
+|   <head>
+|   <body>
+|     "Hello"
+
+#data
+<!DOCTYPE potato PUBLIC goof>Hello
+#errors
+(1,25): unexpected-char-in-doctype
+(1,29): unknown-doctype
+#new-errors
+(1:25) missing-quote-before-doctype-public-identifier
+#document
+| <!DOCTYPE potato>
+| <html>
+|   <head>
+|   <body>
+|     "Hello"
+
+#data
+<!DOCTYPE potato PUBLIC "go'of">Hello
+#errors
+(1,32): unknown-doctype
+#document
+| <!DOCTYPE potato "go'of" "">
+| <html>
+|   <head>
+|   <body>
+|     "Hello"
+
+#data
+<!DOCTYPE potato PUBLIC 'go'of'>Hello
+#errors
+(1,29): unexpected-char-in-doctype
+(1,32): unknown-doctype
+#new-errors
+(1:29) missing-quote-before-doctype-system-identifier
+#document
+| <!DOCTYPE potato "go" "">
+| <html>
+|   <head>
+|   <body>
+|     "Hello"
+
+#data
+<!DOCTYPE potato PUBLIC 'go:hh   of' >Hello
+#errors
+(1,38): unknown-doctype
+#document
+| <!DOCTYPE potato "go:hh   of" "">
+| <html>
+|   <head>
+|   <body>
+|     "Hello"
+
+#data
+<!DOCTYPE potato PUBLIC "W3C-//dfdf" SYSTEM ggg>Hello
+#errors
+(1,38): unexpected-char-in-doctype
+(1,48): unknown-doctype
+#new-errors
+(1:38) missing-quote-before-doctype-system-identifier
+#document
+| <!DOCTYPE potato "W3C-//dfdf" "">
+| <html>
+|   <head>
+|   <body>
+|     "Hello"
+
+#data
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
+   "http://www.w3.org/TR/html4/strict.dtd">Hello
+#errors
+(2,43): unknown-doctype
+#document
+| <!DOCTYPE html "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
+| <html>
+|   <head>
+|   <body>
+|     "Hello"
+
+#data
+<!DOCTYPE ...>Hello
+#errors
+(1,14): unknown-doctype
+#document
+| <!DOCTYPE ...>
+| <html>
+|   <head>
+|   <body>
+|     "Hello"
+
+#data
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+#errors
+(2,58): unknown-doctype
+#document
+| <!DOCTYPE html "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+| <html>
+|   <head>
+|   <body>
+
+#data
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN"
+"http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd">
+#errors
+(2,54): unknown-doctype
+#document
+| <!DOCTYPE html "-//W3C//DTD XHTML 1.0 Frameset//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd">
+| <html>
+|   <head>
+|   <body>
+
+#data
+<!DOCTYPE root-element [SYSTEM OR PUBLIC FPI] "uri" [ 
+<!-- internal declarations -->
+]>
+#errors
+(1,23): expected-space-or-right-bracket-in-doctype
+(2,30): unknown-doctype
+#new-errors
+(1:24) invalid-character-sequence-after-doctype-name
+#document
+| <!DOCTYPE root-element>
+| <html>
+|   <head>
+|   <body>
+|     "]>"
+
+#data
+<!DOCTYPE html PUBLIC
+  "-//WAPFORUM//DTD XHTML Mobile 1.0//EN"
+    "http://www.wapforum.org/DTD/xhtml-mobile10.dtd">
+#errors
+(3,53): unknown-doctype
+#document
+| <!DOCTYPE html "-//WAPFORUM//DTD XHTML Mobile 1.0//EN" "http://www.wapforum.org/DTD/xhtml-mobile10.dtd">
+| <html>
+|   <head>
+|   <body>
+
+#data
+<!DOCTYPE HTML SYSTEM "http://www.w3.org/DTD/HTML4-strict.dtd"><body><b>Mine!</b></body>
+#errors
+(1,63): unknown-doctype
+#document
+| <!DOCTYPE html "" "http://www.w3.org/DTD/HTML4-strict.dtd">
+| <html>
+|   <head>
+|   <body>
+|     <b>
+|       "Mine!"
+
+#data
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN""http://www.w3.org/TR/html4/strict.dtd">
+#errors
+(1,50): unexpected-char-in-doctype
+(1,89): unknown-doctype
+#new-errors
+(1:50) missing-whitespace-between-doctype-public-and-system-identifiers
+#document
+| <!DOCTYPE html "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
+| <html>
+|   <head>
+|   <body>
+
+#data
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"'http://www.w3.org/TR/html4/strict.dtd'>
+#errors
+(1,50): unexpected-char-in-doctype
+(1,89): unknown-doctype
+#new-errors
+(1:50) missing-whitespace-between-doctype-public-and-system-identifiers
+#document
+| <!DOCTYPE html "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
+| <html>
+|   <head>
+|   <body>
+
+#data
+<!DOCTYPE HTML PUBLIC"-//W3C//DTD HTML 4.01//EN"'http://www.w3.org/TR/html4/strict.dtd'>
+#errors
+(1,21): unexpected-char-in-doctype
+(1,49): unexpected-char-in-doctype
+(1,88): unknown-doctype
+#new-errors
+(1:22) missing-whitespace-after-doctype-public-keyword
+(1:49) missing-whitespace-between-doctype-public-and-system-identifiers
+#document
+| <!DOCTYPE html "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
+| <html>
+|   <head>
+|   <body>
+
+#data
+<!DOCTYPE HTML PUBLIC'-//W3C//DTD HTML 4.01//EN''http://www.w3.org/TR/html4/strict.dtd'>
+#errors
+(1,21): unexpected-char-in-doctype
+(1,49): unexpected-char-in-doctype
+(1,88): unknown-doctype
+#new-errors
+(1:22) missing-whitespace-after-doctype-public-keyword
+(1:49) missing-whitespace-between-doctype-public-and-system-identifiers
+#document
+| <!DOCTYPE html "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
+| <html>
+|   <head>
+|   <body>
diff --git a/tests/data/tree-construction/domjs-unsafe.dat b/tests/data/tree-construction/domjs-unsafe.dat
new file mode 100644
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diff --git a/tests/data/tree-construction/entities01.dat b/tests/data/tree-construction/entities01.dat
new file mode 100644
index 00000000..9bacebea
--- /dev/null
+++ b/tests/data/tree-construction/entities01.dat
@@ -0,0 +1,943 @@
+#data
+FOO&gt;BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO>BAR"
+
+#data
+FOO&gtBAR
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,6): named-entity-without-semicolon
+#new-errors
+(1:7) missing-semicolon-after-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO>BAR"
+
+#data
+FOO&gt BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,6): named-entity-without-semicolon
+#new-errors
+(1:7) missing-semicolon-after-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO> BAR"
+
+#data
+FOO&gt;;;BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO>;;BAR"
+
+#data
+I'm &notit; I tell you
+#errors
+(1,4): expected-doctype-but-got-chars
+(1,9): named-entity-without-semicolon
+#new-errors
+(1:9) missing-semicolon-after-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "I'm ¬it; I tell you"
+
+#data
+I'm &notin; I tell you
+#errors
+(1,4): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "I'm ∉ I tell you"
+
+#data
+&ammmp;
+#errors
+(1,1): expected-doctype-but-got-chars
+(1,7): unknown-named-character-reference
+#new-errors
+(1:7) unknown-named-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "&ammmp;"
+
+#data
+&ammmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmp;
+#errors
+(1,1): expected-doctype-but-got-chars
+(1,950): unknown-named-character-reference
+#new-errors
+(1:950) unknown-named-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "&ammmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmp;"
+
+#data
+FOO& BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO& BAR"
+
+#data
+FOO&<BAR>
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,9): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO&"
+|     <bar>
+
+#data
+FOO&&&&gt;BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO&&&>BAR"
+
+#data
+FOO&#41;BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO)BAR"
+
+#data
+FOO&#x41;BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOOABAR"
+
+#data
+FOO&#X41;BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOOABAR"
+
+#data
+FOO&#BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,5): expected-numeric-entity
+#new-errors
+(1:6) absence-of-digits-in-numeric-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO&#BAR"
+
+#data
+FOO&#ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,5): expected-numeric-entity
+#new-errors
+(1:6) absence-of-digits-in-numeric-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO&#ZOO"
+
+#data
+FOO&#xBAR
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,7): expected-numeric-entity
+#new-errors
+(1:9) missing-semicolon-after-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOOºR"
+
+#data
+FOO&#xZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,6): expected-numeric-entity
+#new-errors
+(1:7) absence-of-digits-in-numeric-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO&#xZOO"
+
+#data
+FOO&#XZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,6): expected-numeric-entity
+#new-errors
+(1:7) absence-of-digits-in-numeric-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO&#XZOO"
+
+#data
+FOO&#41BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,7): numeric-entity-without-semicolon
+#new-errors
+(1:8) missing-semicolon-after-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO)BAR"
+
+#data
+FOO&#x41BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,10): numeric-entity-without-semicolon
+#new-errors
+(1:11) missing-semicolon-after-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO䆺R"
+
+#data
+FOO&#x41ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,8): numeric-entity-without-semicolon
+#new-errors
+(1:9) missing-semicolon-after-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOOAZOO"
+
+#data
+FOO&#x0000;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:12) null-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO�ZOO"
+
+#data
+FOO&#x0078;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOOxZOO"
+
+#data
+FOO&#x0079;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOOyZOO"
+
+#data
+FOO&#x0080;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:12) control-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO€ZOO"
+
+#data
+FOO&#x0081;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:12) control-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOOZOO"
+
+#data
+FOO&#x0082;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:12) control-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO‚ZOO"
+
+#data
+FOO&#x0083;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:12) control-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOOƒZOO"
+
+#data
+FOO&#x0084;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:12) control-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO„ZOO"
+
+#data
+FOO&#x0085;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:12) control-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO…ZOO"
+
+#data
+FOO&#x0086;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:12) control-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO†ZOO"
+
+#data
+FOO&#x0087;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:12) control-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO‡ZOO"
+
+#data
+FOO&#x0088;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:12) control-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOOˆZOO"
+
+#data
+FOO&#x0089;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:12) control-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO‰ZOO"
+
+#data
+FOO&#x008A;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:12) control-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOOŠZOO"
+
+#data
+FOO&#x008B;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:12) control-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO‹ZOO"
+
+#data
+FOO&#x008C;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:12) control-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOOŒZOO"
+
+#data
+FOO&#x008D;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:12) control-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOOZOO"
+
+#data
+FOO&#x008E;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:12) control-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOOŽZOO"
+
+#data
+FOO&#x008F;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:12) control-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOOZOO"
+
+#data
+FOO&#x0090;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:12) control-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOOZOO"
+
+#data
+FOO&#x0091;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:12) control-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO‘ZOO"
+
+#data
+FOO&#x0092;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:12) control-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO’ZOO"
+
+#data
+FOO&#x0093;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:12) control-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO“ZOO"
+
+#data
+FOO&#x0094;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:12) control-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO”ZOO"
+
+#data
+FOO&#x0095;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:12) control-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO•ZOO"
+
+#data
+FOO&#x0096;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:12) control-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO–ZOO"
+
+#data
+FOO&#x0097;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:12) control-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO—ZOO"
+
+#data
+FOO&#x0098;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:12) control-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO˜ZOO"
+
+#data
+FOO&#x0099;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:12) control-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO™ZOO"
+
+#data
+FOO&#x009A;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:12) control-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOOšZOO"
+
+#data
+FOO&#x009B;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:12) control-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO›ZOO"
+
+#data
+FOO&#x009C;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:12) control-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOOœZOO"
+
+#data
+FOO&#x009D;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:12) control-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOOZOO"
+
+#data
+FOO&#x009E;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:12) control-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOOžZOO"
+
+#data
+FOO&#x009F;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:12) control-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOOŸZOO"
+
+#data
+FOO&#x00A0;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO ZOO"
+
+#data
+FOO&#xD7FF;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO퟿ZOO"
+
+#data
+FOO&#xD800;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:12) surrogate-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO�ZOO"
+
+#data
+FOO&#xD801;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:12) surrogate-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO�ZOO"
+
+#data
+FOO&#xDFFE;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:12) surrogate-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO�ZOO"
+
+#data
+FOO&#xDFFF;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,11): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:12) surrogate-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO�ZOO"
+
+#data
+FOO&#xE000;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOOZOO"
+
+#data
+FOO&#x10FFFE;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,13): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:14) noncharacter-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO􏿾ZOO"
+
+#data
+FOO&#x1087D4;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO􈟔ZOO"
+
+#data
+FOO&#x10FFFF;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,13): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:14) noncharacter-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO􏿿ZOO"
+
+#data
+FOO&#x110000;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,13): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:14) character-reference-outside-unicode-range
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO�ZOO"
+
+#data
+FOO&#xFFFFFF;ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,13): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:14) character-reference-outside-unicode-range
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO�ZOO"
+
+#data
+FOO&#11111111111
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,13): illegal-codepoint-for-numeric-entity
+(1,13): eof-in-numeric-entity
+#new-errors
+(1:17) missing-semicolon-after-character-reference
+(1:17) character-reference-outside-unicode-range
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO�"
+
+#data
+FOO&#1111111111
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,13): illegal-codepoint-for-numeric-entity
+(1,13): eof-in-numeric-entity
+#new-errors
+(1:16) missing-semicolon-after-character-reference
+(1:16) character-reference-outside-unicode-range
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO�"
+
+#data
+FOO&#111111111111
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,13): illegal-codepoint-for-numeric-entity
+(1,13): eof-in-numeric-entity
+#new-errors
+(1:18) missing-semicolon-after-character-reference
+(1:18) character-reference-outside-unicode-range
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO�"
+
+#data
+FOO&#11111111111ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,16): numeric-entity-without-semicolon
+(1,16): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:17) missing-semicolon-after-character-reference
+(1:17) character-reference-outside-unicode-range
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO�ZOO"
+
+#data
+FOO&#1111111111ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,15): numeric-entity-without-semicolon
+(1,15): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:16) missing-semicolon-after-character-reference
+(1:16) character-reference-outside-unicode-range
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO�ZOO"
+
+#data
+FOO&#111111111111ZOO
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,17): numeric-entity-without-semicolon
+(1,17): illegal-codepoint-for-numeric-entity
+#new-errors
+(1:18) missing-semicolon-after-character-reference
+(1:18) character-reference-outside-unicode-range
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO�ZOO"
diff --git a/tests/data/tree-construction/entities02.dat b/tests/data/tree-construction/entities02.dat
new file mode 100644
index 00000000..74965a35
--- /dev/null
+++ b/tests/data/tree-construction/entities02.dat
@@ -0,0 +1,309 @@
+#data
+<div bar="ZZ&gt;YY"></div>
+#errors
+(1,20): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       bar="ZZ>YY"
+
+#data
+<div bar="ZZ&"></div>
+#errors
+(1,15): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       bar="ZZ&"
+
+#data
+<div bar='ZZ&'></div>
+#errors
+(1,15): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       bar="ZZ&"
+
+#data
+<div bar=ZZ&></div>
+#errors
+(1,13): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       bar="ZZ&"
+
+#data
+<div bar="ZZ&gt=YY"></div>
+#errors
+(1,20): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       bar="ZZ&gt=YY"
+
+#data
+<div bar="ZZ&gt0YY"></div>
+#errors
+(1,20): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       bar="ZZ&gt0YY"
+
+#data
+<div bar="ZZ&gt9YY"></div>
+#errors
+(1,20): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       bar="ZZ&gt9YY"
+
+#data
+<div bar="ZZ&gtaYY"></div>
+#errors
+(1,20): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       bar="ZZ&gtaYY"
+
+#data
+<div bar="ZZ&gtZYY"></div>
+#errors
+(1,20): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       bar="ZZ&gtZYY"
+
+#data
+<div bar="ZZ&gt YY"></div>
+#errors
+(1,15): named-entity-without-semicolon
+(1,20): expected-doctype-but-got-start-tag
+#new-errors
+(1:16) missing-semicolon-after-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       bar="ZZ> YY"
+
+#data
+<div bar="ZZ&gt"></div>
+#errors
+(1,15): named-entity-without-semicolon
+(1,17): expected-doctype-but-got-start-tag
+#new-errors
+(1:16) missing-semicolon-after-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       bar="ZZ>"
+
+#data
+<div bar='ZZ&gt'></div>
+#errors
+(1,15): named-entity-without-semicolon
+(1,17): expected-doctype-but-got-start-tag
+#new-errors
+(1:16) missing-semicolon-after-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       bar="ZZ>"
+
+#data
+<div bar=ZZ&gt></div>
+#errors
+(1,14): named-entity-without-semicolon
+(1,15): expected-doctype-but-got-start-tag
+#new-errors
+(1:15) missing-semicolon-after-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       bar="ZZ>"
+
+#data
+<div bar="ZZ&pound_id=23"></div>
+#errors
+(1,18): named-entity-without-semicolon
+(1,26): expected-doctype-but-got-start-tag
+#new-errors
+(1:19) missing-semicolon-after-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       bar="ZZ£_id=23"
+
+#data
+<div bar="ZZ&prod_id=23"></div>
+#errors
+(1,25): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       bar="ZZ&prod_id=23"
+
+#data
+<div bar="ZZ&pound;_id=23"></div>
+#errors
+(1,27): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       bar="ZZ£_id=23"
+
+#data
+<div bar="ZZ&prod;_id=23"></div>
+#errors
+(1,26): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       bar="ZZ∏_id=23"
+
+#data
+<div bar="ZZ&pound=23"></div>
+#errors
+(1,23): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       bar="ZZ&pound=23"
+
+#data
+<div bar="ZZ&prod=23"></div>
+#errors
+(1,22): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       bar="ZZ&prod=23"
+
+#data
+<div>ZZ&pound_id=23</div>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,13): named-entity-without-semicolon
+#new-errors
+(1:14) missing-semicolon-after-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       "ZZ£_id=23"
+
+#data
+<div>ZZ&prod_id=23</div>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       "ZZ&prod_id=23"
+
+#data
+<div>ZZ&pound;_id=23</div>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       "ZZ£_id=23"
+
+#data
+<div>ZZ&prod;_id=23</div>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       "ZZ∏_id=23"
+
+#data
+<div>ZZ&pound=23</div>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,13): named-entity-without-semicolon
+#new-errors
+(1:14) missing-semicolon-after-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       "ZZ£=23"
+
+#data
+<div>ZZ&prod=23</div>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       "ZZ&prod=23"
+
+#data
+<div>ZZ&AElig=</div>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1:14) missing-semicolon-after-character-reference
+#new-errors
+(1:14) missing-semicolon-after-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       "ZZÆ="
diff --git a/tests/data/tree-construction/foreign-fragment.dat b/tests/data/tree-construction/foreign-fragment.dat
new file mode 100644
index 00000000..e562c6b8
--- /dev/null
+++ b/tests/data/tree-construction/foreign-fragment.dat
@@ -0,0 +1,645 @@
+#data
+<nobr>X
+#errors
+6: HTML start tag “nobr” in a foreign namespace context.
+7: End of file seen and there were open elements.
+#document-fragment
+svg path
+#document
+| <nobr>
+|   "X"
+
+#data
+<font color></font>X
+#errors
+12: HTML start tag “font” in a foreign namespace context.
+#document-fragment
+svg path
+#document
+| <font>
+|   color=""
+| "X"
+
+#data
+<font></font>X
+#errors
+#document-fragment
+svg path
+#document
+| <svg font>
+| "X"
+
+#data
+<g></path>X
+#errors
+10: End tag “path” did not match the name of the current open element (“g”).
+11: End of file seen and there were open elements.
+#document-fragment
+svg path
+#document
+| <svg g>
+|   "X"
+
+#data
+</path>X
+#errors
+5: Stray end tag “path”.
+#document-fragment
+svg path
+#document
+| "X"
+
+#data
+</foreignObject>X
+#errors
+5: Stray end tag “foreignobject”.
+#document-fragment
+svg foreignObject
+#document
+| "X"
+
+#data
+</desc>X
+#errors
+5: Stray end tag “desc”.
+#document-fragment
+svg desc
+#document
+| "X"
+
+#data
+</title>X
+#errors
+5: Stray end tag “title”.
+#document-fragment
+svg title
+#document
+| "X"
+
+#data
+</svg>X
+#errors
+5: Stray end tag “svg”.
+#document-fragment
+svg svg
+#document
+| "X"
+
+#data
+</mfenced>X
+#errors
+5: Stray end tag “mfenced”.
+#document-fragment
+math mfenced
+#document
+| "X"
+
+#data
+</malignmark>X
+#errors
+5: Stray end tag “malignmark”.
+#document-fragment
+math malignmark
+#document
+| "X"
+
+#data
+</math>X
+#errors
+5: Stray end tag “math”.
+#document-fragment
+math math
+#document
+| "X"
+
+#data
+</annotation-xml>X
+#errors
+5: Stray end tag “annotation-xml”.
+#document-fragment
+math annotation-xml
+#document
+| "X"
+
+#data
+</mtext>X
+#errors
+5: Stray end tag “mtext”.
+#document-fragment
+math mtext
+#document
+| "X"
+
+#data
+</mi>X
+#errors
+5: Stray end tag “mi”.
+#document-fragment
+math mi
+#document
+| "X"
+
+#data
+</mo>X
+#errors
+5: Stray end tag “mo”.
+#document-fragment
+math mo
+#document
+| "X"
+
+#data
+</mn>X
+#errors
+5: Stray end tag “mn”.
+#document-fragment
+math mn
+#document
+| "X"
+
+#data
+</ms>X
+#errors
+5: Stray end tag “ms”.
+#document-fragment
+math ms
+#document
+| "X"
+
+#data
+<b></b><mglyph/><i></i><malignmark/><u></u><ms/>X
+#errors
+51: Self-closing syntax (“/>”) used on a non-void HTML element. Ignoring the slash and treating as a start tag.
+52: End of file seen and there were open elements.
+#new-errors
+(1:44-1:49) non-void-html-element-start-tag-with-trailing-solidus
+#document-fragment
+math ms
+#document
+| <b>
+| <math mglyph>
+| <i>
+| <math malignmark>
+| <u>
+| <ms>
+|   "X"
+
+#data
+<malignmark></malignmark>
+#errors
+#document-fragment
+math ms
+#document
+| <math malignmark>
+
+#data
+<div></div>
+#errors
+#document-fragment
+math ms
+#document
+| <div>
+
+#data
+<figure></figure>
+#errors
+#document-fragment
+math ms
+#document
+| <figure>
+
+#data
+<b></b><mglyph/><i></i><malignmark/><u></u><mn/>X
+#errors
+51: Self-closing syntax (“/>”) used on a non-void HTML element. Ignoring the slash and treating as a start tag.
+52: End of file seen and there were open elements.
+#new-errors
+(1:44-1:49) non-void-html-element-start-tag-with-trailing-solidus
+#document-fragment
+math mn
+#document
+| <b>
+| <math mglyph>
+| <i>
+| <math malignmark>
+| <u>
+| <mn>
+|   "X"
+
+#data
+<malignmark></malignmark>
+#errors
+#document-fragment
+math mn
+#document
+| <math malignmark>
+
+#data
+<div></div>
+#errors
+#document-fragment
+math mn
+#document
+| <div>
+
+#data
+<figure></figure>
+#errors
+#document-fragment
+math mn
+#document
+| <figure>
+
+#data
+<b></b><mglyph/><i></i><malignmark/><u></u><mo/>X
+#errors
+51: Self-closing syntax (“/>”) used on a non-void HTML element. Ignoring the slash and treating as a start tag.
+52: End of file seen and there were open elements.
+#new-errors
+(1:44-1:49) non-void-html-element-start-tag-with-trailing-solidus
+#document-fragment
+math mo
+#document
+| <b>
+| <math mglyph>
+| <i>
+| <math malignmark>
+| <u>
+| <mo>
+|   "X"
+
+#data
+<malignmark></malignmark>
+#errors
+#document-fragment
+math mo
+#document
+| <math malignmark>
+
+#data
+<div></div>
+#errors
+#document-fragment
+math mo
+#document
+| <div>
+
+#data
+<figure></figure>
+#errors
+#document-fragment
+math mo
+#document
+| <figure>
+
+#data
+<b></b><mglyph/><i></i><malignmark/><u></u><mi/>X
+#errors
+51: Self-closing syntax (“/>”) used on a non-void HTML element. Ignoring the slash and treating as a start tag.
+52: End of file seen and there were open elements.
+#new-errors
+(1:44-1:49) non-void-html-element-start-tag-with-trailing-solidus
+#document-fragment
+math mi
+#document
+| <b>
+| <math mglyph>
+| <i>
+| <math malignmark>
+| <u>
+| <mi>
+|   "X"
+
+#data
+<malignmark></malignmark>
+#errors
+#document-fragment
+math mi
+#document
+| <math malignmark>
+
+#data
+<div></div>
+#errors
+#document-fragment
+math mi
+#document
+| <div>
+
+#data
+<figure></figure>
+#errors
+#document-fragment
+math mi
+#document
+| <figure>
+
+#data
+<b></b><mglyph/><i></i><malignmark/><u></u><mtext/>X
+#errors
+51: Self-closing syntax (“/>”) used on a non-void HTML element. Ignoring the slash and treating as a start tag.
+52: End of file seen and there were open elements.
+#new-errors
+(1:44-1:52) non-void-html-element-start-tag-with-trailing-solidus
+#document-fragment
+math mtext
+#document
+| <b>
+| <math mglyph>
+| <i>
+| <math malignmark>
+| <u>
+| <mtext>
+|   "X"
+
+#data
+<malignmark></malignmark>
+#errors
+#document-fragment
+math mtext
+#document
+| <math malignmark>
+
+#data
+<div></div>
+#errors
+#document-fragment
+math mtext
+#document
+| <div>
+
+#data
+<figure></figure>
+#errors
+#document-fragment
+math mtext
+#document
+| <figure>
+
+#data
+<div></div>
+#errors
+5: HTML start tag “div” in a foreign namespace context.
+#document-fragment
+math annotation-xml
+#document
+| <div>
+
+#data
+<figure></figure>
+#errors
+#document-fragment
+math annotation-xml
+#document
+| <math figure>
+
+#data
+<div></div>
+#errors
+5: HTML start tag “div” in a foreign namespace context.
+#document-fragment
+math math
+#document
+| <div>
+
+#data
+<figure></figure>
+#errors
+#document-fragment
+math math
+#document
+| <math figure>
+
+#data
+<div></div>
+#errors
+#document-fragment
+svg foreignObject
+#document
+| <div>
+
+#data
+<figure></figure>
+#errors
+#document-fragment
+svg foreignObject
+#document
+| <figure>
+
+#data
+<div></div>
+#errors
+#document-fragment
+svg title
+#document
+| <div>
+
+#data
+<figure></figure>
+#errors
+#document-fragment
+svg title
+#document
+| <figure>
+
+#data
+<figure></figure>
+#errors
+#document-fragment
+svg desc
+#document
+| <figure>
+
+#data
+<div><h1>X</h1></div>
+#errors
+5: HTML start tag “div” in a foreign namespace context.
+#document-fragment
+svg svg
+#document
+| <div>
+|   <h1>
+|     "X"
+
+#data
+<div></div>
+#errors
+5: HTML start tag “div” in a foreign namespace context.
+#document-fragment
+svg svg
+#document
+| <div>
+
+#data
+<div></div>
+#errors
+#document-fragment
+svg desc
+#document
+| <div>
+
+#data
+<plaintext><foo>
+#errors
+(1,16): expected-closing-tag-but-got-eof
+#document-fragment
+svg desc
+#document
+| <plaintext>
+|   "<foo>"
+
+#data
+<frameset>X
+#errors
+6: Stray start tag “frameset”.
+#document-fragment
+svg desc
+#document
+| "X"
+
+#data
+<head>X
+#errors
+6: Stray start tag “head”.
+#document-fragment
+svg desc
+#document
+| "X"
+
+#data
+<body>X
+#errors
+6: Stray start tag “body”.
+#document-fragment
+svg desc
+#document
+| "X"
+
+#data
+<html>X
+#errors
+6: Stray start tag “html”.
+#document-fragment
+svg desc
+#document
+| "X"
+
+#data
+<html class="foo">X
+#errors
+6: Stray start tag “html”.
+#document-fragment
+svg desc
+#document
+| "X"
+
+#data
+<body class="foo">X
+#errors
+6: Stray start tag “body”.
+#document-fragment
+svg desc
+#document
+| "X"
+
+#data
+<svg><p>
+#errors
+8: HTML start tag “p” in a foreign namespace context.
+#document-fragment
+div
+#document
+| <svg svg>
+| <p>
+
+#data
+<p>
+#errors
+3: HTML start tag “p” in a foreign namespace context.
+#document-fragment
+svg svg
+#document
+| <p>
+
+#data
+<svg></p><foo>
+#errors
+9: HTML end tag “p” in a foreign namespace context.
+(1:6) Unexpected </p> from in body insertion mode
+(1:15) Unexpected EOF
+#document-fragment
+div
+#document
+| <svg svg>
+| <p>
+| <foo>
+
+#data
+<svg></br><foo>
+#errors
+10: HTML end tag “br” in a foreign namespace context.
+(1:6) Unexpected </br> from in body insertion mode
+(1:16) Unexpected EOF
+#document-fragment
+div
+#document
+| <svg svg>
+| <br>
+| <foo>
+
+#data
+</p><foo>
+#errors
+4: HTML end tag “p” in a foreign namespace context.
+(1:1) Unexpected </p> from in body insertion mode
+(1:10) Unexpected EOF
+#document-fragment
+svg svg
+#document
+| <p>
+| <svg foo>
+
+#data
+</br><foo>
+#errors
+5: HTML end tag “br” in a foreign namespace context.
+(1:1) Unexpected </br> from in body insertion mode
+(1:11) Unexpected EOF
+#document-fragment
+svg svg
+#document
+| <br>
+| <svg foo>
+
+#data
+<body><foo>
+#errors
+6: HTML start tag “body” in a foreign namespace context.
+(1:1) Unexpected <body> from in body insertion mode
+(1:12) Unexpected EOF
+#document-fragment
+svg svg
+#document
+| <svg foo>
+
+#data
+<p><foo>
+#errors
+3: HTML start tag “p” in a foreign namespace context.
+(1:9) Unexpected EOF
+#document-fragment
+svg svg
+#document
+| <p>
+|   <foo>
+
+#data
+<p></p><foo>
+#errors
+3: HTML start tag “p” in a foreign namespace context.
+(1:13) Unexpected EOF
+#document-fragment
+svg svg
+#document
+| <p>
+| <svg foo>
diff --git a/tests/data/tree-construction/html5test-com.dat b/tests/data/tree-construction/html5test-com.dat
new file mode 100644
index 00000000..48d0bf95
--- /dev/null
+++ b/tests/data/tree-construction/html5test-com.dat
@@ -0,0 +1,301 @@
+#data
+<div<div>
+#errors
+(1,9): expected-doctype-but-got-start-tag
+(1,9): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div<div>
+
+#data
+<div foo<bar=''>
+#errors
+(1,9): invalid-character-in-attribute-name
+(1,16): expected-doctype-but-got-start-tag
+(1,16): expected-closing-tag-but-got-eof
+#new-errors
+(1:9) unexpected-character-in-attribute-name
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       foo<bar=""
+
+#data
+<div foo=`bar`>
+#errors
+(1,10): equals-in-unquoted-attribute-value
+(1,14): unexpected-character-in-unquoted-attribute-value
+(1,15): expected-doctype-but-got-start-tag
+(1,15): expected-closing-tag-but-got-eof
+#new-errors
+(1:10) unexpected-character-in-unquoted-attribute-value
+(1:14) unexpected-character-in-unquoted-attribute-value
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       foo="`bar`"
+
+#data
+<div \"foo=''>
+#errors
+(1,7): invalid-character-in-attribute-name
+(1,14): expected-doctype-but-got-start-tag
+(1,14): expected-closing-tag-but-got-eof
+#new-errors
+(1:7) unexpected-character-in-attribute-name
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       \"foo=""
+
+#data
+<a href='\nbar'></a>
+#errors
+(1,16): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <a>
+|       href="\nbar"
+
+#data
+<!DOCTYPE html>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+
+#data
+&lang;&rang;
+#errors
+(1,6): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "⟨⟩"
+
+#data
+&apos;
+#errors
+(1,6): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "'"
+
+#data
+&ImaginaryI;
+#errors
+(1,12): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "ⅈ"
+
+#data
+&Kopf;
+#errors
+(1,6): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "𝕂"
+
+#data
+&notinva;
+#errors
+(1,9): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "∉"
+
+#data
+<?import namespace="foo" implementation="#bar">
+#errors
+(1,1): expected-tag-name-but-got-question-mark
+(1,47): expected-doctype-but-got-eof
+#new-errors
+(1:2) unexpected-question-mark-instead-of-tag-name
+#document
+| <!-- ?import namespace="foo" implementation="#bar" -->
+| <html>
+|   <head>
+|   <body>
+
+#data
+<!--foo--bar-->
+#errors
+(1,15): expected-doctype-but-got-eof
+#document
+| <!-- foo--bar -->
+| <html>
+|   <head>
+|   <body>
+
+#data
+<![CDATA[x]]>
+#errors
+(1,2): expected-dashes-or-doctype
+(1,13): expected-doctype-but-got-eof
+#new-errors
+(1:9) cdata-in-html-content
+#document
+| <!-- [CDATA[x]] -->
+| <html>
+|   <head>
+|   <body>
+
+#data
+<textarea><!--</textarea>--></textarea>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+(1,39): unexpected-end-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <textarea>
+|       "<!--"
+|     "-->"
+
+#data
+<textarea><!--</textarea>-->
+#errors
+(1,10): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <textarea>
+|       "<!--"
+|     "-->"
+
+#data
+<style><!--</style>--></style>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,30): unexpected-end-tag
+#document
+| <html>
+|   <head>
+|     <style>
+|       "<!--"
+|   <body>
+|     "-->"
+
+#data
+<style><!--</style>-->
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|     <style>
+|       "<!--"
+|   <body>
+|     "-->"
+
+#data
+<ul><li>A </li> <li>B</li></ul>
+#errors
+(1,4): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <ul>
+|       <li>
+|         "A "
+|       " "
+|       <li>
+|         "B"
+
+#data
+<table><form><input type=hidden><input></form><div></div></table>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,13): unexpected-form-in-table
+(1,32): unexpected-hidden-input-in-table
+(1,39): unexpected-start-tag-implies-table-voodoo
+(1,46): unexpected-end-tag-implies-table-voodoo
+(1,46): unexpected-end-tag
+(1,51): unexpected-start-tag-implies-table-voodoo
+(1,57): unexpected-end-tag-implies-table-voodoo
+#document
+| <html>
+|   <head>
+|   <body>
+|     <input>
+|     <div>
+|     <table>
+|       <form>
+|       <input>
+|         type="hidden"
+
+#data
+<i>A<b>B<p></i>C</b>D
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,15): adoption-agency-1.3
+(1,20): adoption-agency-1.3
+#document
+| <html>
+|   <head>
+|   <body>
+|     <i>
+|       "A"
+|       <b>
+|         "B"
+|     <b>
+|     <p>
+|       <b>
+|         <i>
+|         "C"
+|       "D"
+
+#data
+<div></div>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+
+#data
+<svg></svg>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+
+#data
+<math></math>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <math math>
diff --git a/tests/data/tree-construction/inbody01.dat b/tests/data/tree-construction/inbody01.dat
new file mode 100644
index 00000000..10f6520f
--- /dev/null
+++ b/tests/data/tree-construction/inbody01.dat
@@ -0,0 +1,54 @@
+#data
+<button>1</foo>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,15): unexpected-end-tag
+(1,15): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <button>
+|       "1"
+
+#data
+<foo>1<p>2</foo>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,16): unexpected-end-tag
+(1,16): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <foo>
+|       "1"
+|       <p>
+|         "2"
+
+#data
+<dd>1</foo>
+#errors
+(1,4): expected-doctype-but-got-start-tag
+(1,11): unexpected-end-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <dd>
+|       "1"
+
+#data
+<foo>1<dd>2</foo>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,17): unexpected-end-tag
+(1,17): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <foo>
+|       "1"
+|       <dd>
+|         "2"
diff --git a/tests/data/tree-construction/isindex.dat b/tests/data/tree-construction/isindex.dat
new file mode 100644
index 00000000..733f82ea
--- /dev/null
+++ b/tests/data/tree-construction/isindex.dat
@@ -0,0 +1,49 @@
+#data
+<isindex>
+#errors
+(1,9): expected-doctype-but-got-start-tag
+(1,9): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <isindex>
+
+#data
+<isindex name="A" action="B" prompt="C" foo="D">
+#errors
+(1,48): expected-doctype-but-got-start-tag
+(1,48): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <isindex>
+|       action="B"
+|       foo="D"
+|       name="A"
+|       prompt="C"
+
+#data
+<form><isindex>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,15): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <form>
+|       <isindex>
+
+#data
+<!doctype html><isindex>x</isindex>x
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <isindex>
+|       "x"
+|     "x"
diff --git a/tests/data/tree-construction/main-element.dat b/tests/data/tree-construction/main-element.dat
new file mode 100644
index 00000000..4b103bb0
--- /dev/null
+++ b/tests/data/tree-construction/main-element.dat
@@ -0,0 +1,46 @@
+#data
+<!doctype html><p>foo<main>bar<p>baz
+#errors
+(1,36): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       "foo"
+|     <main>
+|       "bar"
+|       <p>
+|         "baz"
+
+#data
+<!doctype html><main><p>foo</main>bar
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <main>
+|       <p>
+|         "foo"
+|     "bar"
+
+#data
+<!DOCTYPE html>xxx<svg><x><g><a><main><b>
+#errors
+ * (1,42) unexpected HTML-like start tag token in foreign content
+ * (1,42) unexpected end of file
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     "xxx"
+|     <svg svg>
+|       <svg x>
+|         <svg g>
+|           <svg a>
+|             <svg main>
+|     <b>
diff --git a/tests/data/tree-construction/math.dat b/tests/data/tree-construction/math.dat
new file mode 100644
index 00000000..d6a8ae56
--- /dev/null
+++ b/tests/data/tree-construction/math.dat
@@ -0,0 +1,104 @@
+#data
+<math><tr><td><mo><tr>
+#errors
+(1,22): unexpected-start-tag
+(1,23): expected-closing-tag-but-got-eof
+#document-fragment
+td
+#document
+| <math math>
+|   <math tr>
+|     <math td>
+|       <math mo>
+
+#data
+<math><tr><td><mo><tr>
+#errors
+(1,6): foster-parenting-start-tag
+(1,22): expected-tr-in-table-scope
+(1,23): expected-closing-tag-but-got-eof
+#document-fragment
+tr
+#document
+| <math math>
+|   <math tr>
+|     <math td>
+|       <math mo>
+
+#data
+<math><thead><mo><tbody>
+#errors
+(1,6): foster-parenting-start-tag
+(1,24): expected-table-part-in-table-scope
+(1,25): expected-closing-tag-but-got-eof
+#document-fragment
+thead
+#document
+| <math math>
+|   <math thead>
+|     <math mo>
+
+#data
+<math><tfoot><mo><tbody>
+#errors
+(1,6): foster-parenting-start-tag
+(1,24): expected-table-part-in-table-scope
+(1,25): expected-closing-tag-but-got-eof
+#document-fragment
+tfoot
+#document
+| <math math>
+|   <math tfoot>
+|     <math mo>
+
+#data
+<math><tbody><mo><tfoot>
+#errors
+(1,6): foster-parenting-start-tag
+(1,24): expected-table-part-in-table-scope
+(1,25): expected-closing-tag-but-got-eof
+#document-fragment
+tbody
+#document
+| <math math>
+|   <math tbody>
+|     <math mo>
+
+#data
+<math><tbody><mo></table>
+#errors
+(1,6): foster-parenting-start-tag
+(1,25): unexpected-end-tag-in-math
+(1,26): expected-closing-tag-but-got-eof
+#document-fragment
+tbody
+#document
+| <math math>
+|   <math tbody>
+|     <math mo>
+
+#data
+<math><thead><mo></table>
+#errors
+(1,6): foster-parenting-start-tag
+(1,25): unexpected-end-tag-in-math
+(1,26): expected-closing-tag-but-got-eof
+#document-fragment
+tbody
+#document
+| <math math>
+|   <math thead>
+|     <math mo>
+
+#data
+<math><tfoot><mo></table>
+#errors
+(1,6): foster-parenting-start-tag
+(1,25): unexpected-end-tag-in-math
+(1,26): expected-closing-tag-but-got-eof
+#document-fragment
+tbody
+#document
+| <math math>
+|   <math tfoot>
+|     <math mo>
diff --git a/tests/data/tree-construction/menuitem-element.dat b/tests/data/tree-construction/menuitem-element.dat
new file mode 100644
index 00000000..f7c8e2c3
--- /dev/null
+++ b/tests/data/tree-construction/menuitem-element.dat
@@ -0,0 +1,241 @@
+#data
+<menuitem>
+#errors
+10: Start tag seen without seeing a doctype first. Expected “<!DOCTYPE html>”.
+10: End of file seen and there were open elements.
+#document
+| <html>
+|   <head>
+|   <body>
+|     <menuitem>
+
+#data
+</menuitem>
+#errors
+11: End tag seen without seeing a doctype first. Expected “<!DOCTYPE html>”.
+11: Stray end tag “menuitem”.
+#document
+| <html>
+|   <head>
+|   <body>
+
+#data
+<!DOCTYPE html><body><menuitem>A
+#errors
+32: End of file seen and there were open elements.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <menuitem>
+|       "A"
+
+#data
+<!DOCTYPE html><body><menuitem>A<menuitem>B
+#errors
+43: End of file seen and there were open elements.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <menuitem>
+|       "A"
+|       <menuitem>
+|         "B"
+
+#data
+<!DOCTYPE html><body><menuitem>A<menu>B</menu>
+#errors
+46: End of file seen and there were open elements.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <menuitem>
+|       "A"
+|       <menu>
+|         "B"
+
+#data
+<!DOCTYPE html><body><menuitem>A<hr>B
+#errors
+37: End of file seen and there were open elements.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <menuitem>
+|       "A"
+|       <hr>
+|       "B"
+
+#data
+<!DOCTYPE html><li><menuitem><li>
+#errors
+33: End tag “li” implied, but there were open elements.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <li>
+|       <menuitem>
+|     <li>
+
+#data
+<!DOCTYPE html><menuitem><p></menuitem>x
+#errors
+39: Stray end tag “menuitem”.
+40: End of file seen and there were open elements.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <menuitem>
+|       <p>
+|         "x"
+
+#data
+<!DOCTYPE html><p><b></p><menuitem>
+#errors
+25: End tag “p” seen, but there were open elements.
+35: End of file seen and there were open elements.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <b>
+|     <b>
+|       <menuitem>
+
+#data
+<!DOCTYPE html><menuitem><asdf></menuitem>x
+#errors
+42: End tag “menuitem” seen, but there were open elements.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <menuitem>
+|       <asdf>
+|     "x"
+
+#data
+<!DOCTYPE html></menuitem>
+#errors
+26: Stray end tag “menuitem”.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+
+#data
+<!DOCTYPE html><html></menuitem>
+#errors
+26: Stray end tag “menuitem”.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+
+#data
+<!DOCTYPE html><head></menuitem>
+#errors
+26: Stray end tag “menuitem”.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+
+#data
+<!DOCTYPE html><select><menuitem></select>
+#errors
+1:34: ERROR: End tag 'select' isn't allowed here. Currently open tags: html, body, select, menuitem.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <menuitem>
+
+#data
+<!DOCTYPE html><option><menuitem>
+#errors
+33: End of file seen and there were open elements.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <option>
+|       <menuitem>
+
+#data
+<!DOCTYPE html><menuitem><option>
+#errors
+33: End of file seen and there were open elements.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <menuitem>
+|       <option>
+
+#data
+<!DOCTYPE html><menuitem></body>
+#errors
+32: End tag for  “body” seen, but there were unclosed elements.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <menuitem>
+
+#data
+<!DOCTYPE html><menuitem></html>
+#errors
+32: End tag for  “html” seen, but there were unclosed elements.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <menuitem>
+
+#data
+<!DOCTYPE html><menuitem><p>
+#errors
+28: End of file seen and there were open elements.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <menuitem>
+|       <p>
+
+#data
+<!DOCTYPE html><menuitem><li>
+#errors
+29: End of file seen and there were open elements.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <menuitem>
+|       <li>
diff --git a/tests/data/tree-construction/namespace-sensitivity.dat b/tests/data/tree-construction/namespace-sensitivity.dat
new file mode 100644
index 00000000..050dca75
--- /dev/null
+++ b/tests/data/tree-construction/namespace-sensitivity.dat
@@ -0,0 +1,22 @@
+#data
+<body><table><tr><td><svg><td><foreignObject><span></td>Foo
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,56): unexpected-end-tag
+(1,60): foster-parenting-character
+(1,60): foster-parenting-character
+(1,60): foster-parenting-character
+(1,60): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     "Foo"
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             <svg svg>
+|               <svg td>
+|                 <svg foreignObject>
+|                   <span>
diff --git a/tests/data/tree-construction/noscript01.dat b/tests/data/tree-construction/noscript01.dat
new file mode 100644
index 00000000..ec3496ce
--- /dev/null
+++ b/tests/data/tree-construction/noscript01.dat
@@ -0,0 +1,237 @@
+#data
+<head><noscript><!doctype html><!--foo--></noscript>
+#errors
+Line: 1 Col: 6 Unexpected start tag (head). Expected DOCTYPE.
+Line: 1 Col: 31 Unexpected DOCTYPE. Ignored.
+#script-off
+#document
+| <html>
+|   <head>
+|     <noscript>
+|       <!-- foo -->
+|   <body>
+
+#data
+<head><noscript><html class="foo"><!--foo--></noscript>
+#errors
+Line: 1 Col: 6 Unexpected start tag (head). Expected DOCTYPE.
+Line: 1 Col: 34 html needs to be the first start tag.
+#script-off
+#document
+| <html>
+|   class="foo"
+|   <head>
+|     <noscript>
+|       <!-- foo -->
+|   <body>
+
+#data
+<head><noscript></noscript>
+#errors
+(1,6): expected-doctype-but-got-tag
+#script-off
+#document
+| <html>
+|   <head>
+|     <noscript>
+|   <body>
+
+#data
+<head><noscript>   </noscript>
+#errors
+Line: 1 Col: 6 Unexpected start tag (head). Expected DOCTYPE.
+#script-off
+#document
+| <html>
+|   <head>
+|     <noscript>
+|       "   "
+|   <body>
+
+#data
+<head><noscript><!--foo--></noscript>
+#errors
+(1,6): expected-doctype-but-got-tag
+#script-off
+#document
+| <html>
+|   <head>
+|     <noscript>
+|       <!-- foo -->
+|   <body>
+
+#data
+<head><noscript><basefont><!--foo--></noscript>
+#errors
+Line: 1 Col: 6 Unexpected start tag (head). Expected DOCTYPE.
+#script-off
+#document
+| <html>
+|   <head>
+|     <noscript>
+|       <basefont>
+|       <!-- foo -->
+|   <body>
+
+#data
+<head><noscript><bgsound><!--foo--></noscript>
+#errors
+Line: 1 Col: 6 Unexpected start tag (head). Expected DOCTYPE.
+#script-off
+#document
+| <html>
+|   <head>
+|     <noscript>
+|       <bgsound>
+|       <!-- foo -->
+|   <body>
+
+#data
+<head><noscript><link><!--foo--></noscript>
+#errors
+Line: 1 Col: 6 Unexpected start tag (head). Expected DOCTYPE.
+#script-off
+#document
+| <html>
+|   <head>
+|     <noscript>
+|       <link>
+|       <!-- foo -->
+|   <body>
+
+#data
+<head><noscript><meta><!--foo--></noscript>
+#errors
+Line: 1 Col: 6 Unexpected start tag (head). Expected DOCTYPE.
+#script-off
+#document
+| <html>
+|   <head>
+|     <noscript>
+|       <meta>
+|       <!-- foo -->
+|   <body>
+
+#data
+<head><noscript><noframes>XXX</noscript></noframes></noscript>
+#errors
+Line: 1 Col: 6 Unexpected start tag (head). Expected DOCTYPE.
+#script-off
+#document
+| <html>
+|   <head>
+|     <noscript>
+|       <noframes>
+|         "XXX</noscript>"
+|   <body>
+
+#data
+<head><noscript><style>XXX</style></noscript>
+#errors
+Line: 1 Col: 6 Unexpected start tag (head). Expected DOCTYPE.
+#script-off
+#document
+| <html>
+|   <head>
+|     <noscript>
+|       <style>
+|         "XXX"
+|   <body>
+
+#data
+<head><noscript></br><!--foo--></noscript>
+#errors
+Line: 1 Col: 6 Unexpected start tag (head). Expected DOCTYPE.
+Line: 1 Col: 21 Element br not allowed in a inhead-noscript context
+Line: 1 Col: 21 Unexpected end tag (br). Treated as br element.
+Line: 1 Col: 42 Unexpected end tag (noscript). Ignored.
+#script-off
+#document
+| <html>
+|   <head>
+|     <noscript>
+|   <body>
+|     <br>
+|     <!-- foo -->
+
+#data
+<head><noscript><head class="foo"><!--foo--></noscript>
+#errors
+Line: 1 Col: 6 Unexpected start tag (head). Expected DOCTYPE.
+Line: 1 Col: 34 Unexpected start tag (head).
+#script-off
+#document
+| <html>
+|   <head>
+|     <noscript>
+|       <!-- foo -->
+|   <body>
+
+#data
+<head><noscript><noscript class="foo"><!--foo--></noscript>
+#errors
+Line: 1 Col: 6 Unexpected start tag (head). Expected DOCTYPE.
+Line: 1 Col: 34 Unexpected start tag (noscript).
+#script-off
+#document
+| <html>
+|   <head>
+|     <noscript>
+|       <!-- foo -->
+|   <body>
+
+#data
+<head><noscript></p><!--foo--></noscript>
+#errors
+Line: 1 Col: 6 Unexpected start tag (head). Expected DOCTYPE.
+Line: 1 Col: 20 Unexpected end tag (p). Ignored.
+#script-off
+#document
+| <html>
+|   <head>
+|     <noscript>
+|       <!-- foo -->
+|   <body>
+
+#data
+<head><noscript><p><!--foo--></noscript>
+#errors
+Line: 1 Col: 6 Unexpected start tag (head). Expected DOCTYPE.
+Line: 1 Col: 19 Element p not allowed in a inhead-noscript context
+Line: 1 Col: 40 Unexpected end tag (noscript). Ignored.
+#script-off
+#document
+| <html>
+|   <head>
+|     <noscript>
+|   <body>
+|     <p>
+|       <!-- foo -->
+
+#data
+<head><noscript>XXX<!--foo--></noscript></head>
+#errors
+Line: 1 Col: 6 Unexpected start tag (head). Expected DOCTYPE.
+Line: 1 Col: 19 Unexpected non-space character. Expected inhead-noscript content
+Line: 1 Col: 30 Unexpected end tag (noscript). Ignored.
+Line: 1 Col: 37 Unexpected end tag (head). Ignored.
+#script-off
+#document
+| <html>
+|   <head>
+|     <noscript>
+|   <body>
+|     "XXX"
+|     <!-- foo -->
+
+#data
+<head><noscript>
+#errors
+(1,6): expected-doctype-but-got-tag
+(1,6): eof-in-head-noscript
+#script-off
+#document
+| <html>
+|   <head>
+|     <noscript>
+|   <body>
diff --git a/tests/data/tree-construction/pending-spec-changes-plain-text-unsafe.dat b/tests/data/tree-construction/pending-spec-changes-plain-text-unsafe.dat
new file mode 100644
index 0000000000000000000000000000000000000000..2c546d40b8b1d8a918878a64d19d36dc7fe29204
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/tests/data/tree-construction/pending-spec-changes.dat b/tests/data/tree-construction/pending-spec-changes.dat
new file mode 100644
index 00000000..1647d7f2
--- /dev/null
+++ b/tests/data/tree-construction/pending-spec-changes.dat
@@ -0,0 +1,46 @@
+#data
+<input type="hidden"><frameset>
+#errors
+(1,21): expected-doctype-but-got-start-tag
+(1,31): unexpected-start-tag
+(1,31): eof-in-frameset
+#document
+| <html>
+|   <head>
+|   <frameset>
+
+#data
+<!DOCTYPE html><table><caption><svg>foo</table>bar
+#errors
+(1,47): unexpected-end-tag
+(1,47): end-table-tag-in-caption
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <caption>
+|         <svg svg>
+|           "foo"
+|     "bar"
+
+#data
+<table><tr><td><svg><desc><td></desc><circle>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,30): unexpected-cell-end-tag
+(1,37): unexpected-end-tag
+(1,45): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             <svg svg>
+|               <svg desc>
+|           <td>
+|             <circle>
diff --git a/tests/data/tree-construction/plain-text-unsafe.dat b/tests/data/tree-construction/plain-text-unsafe.dat
new file mode 100644
index 0000000000000000000000000000000000000000..e904eff0b73aab1f2611501a76bb865e4b086d60
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ap-R@7_Kvb=?SLB|w05{9%dEsgwf+Uo*4h35

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HcmV?d00001

diff --git a/tests/data/tree-construction/quirks01.dat b/tests/data/tree-construction/quirks01.dat
new file mode 100644
index 00000000..bc58de5c
--- /dev/null
+++ b/tests/data/tree-construction/quirks01.dat
@@ -0,0 +1,53 @@
+#data
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN"
+"http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd"><p><table>
+#errors
+(2,54): unknown-doctype
+(2,64): eof-in-table
+#document
+| <!DOCTYPE html "-//W3C//DTD XHTML 1.0 Frameset//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd">
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|     <table>
+
+#data
+<!DOCTYPE html SYSTEM "http://www.ibm.com/data/dtd/v11/ibmxhtml1-transitional.dtd"><p><table>
+#errors
+(1,83): unknown-doctype
+(1,93): eof-in-table
+#document
+| <!DOCTYPE html "" "http://www.ibm.com/data/dtd/v11/ibmxhtml1-transitional.dtd">
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <table>
+
+#data
+<!DOCTYPE html PUBLIC "html"><p><table>
+#errors
+(1,30): unknown-doctype
+(1,39): eof-in-table
+#document
+| <!DOCTYPE html "html" "">
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <table>
+
+#data
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"
+   "http://www.w3.org/TR/html4/strict.dtd"><p><table>
+#errors
+(2,43): unknown-doctype
+(2,53): eof-in-table
+#document
+| <!DOCTYPE html "-//W3C//DTD HTML 3.2//EN" "http://www.w3.org/TR/html4/strict.dtd">
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <table>
diff --git a/tests/data/tree-construction/ruby.dat b/tests/data/tree-construction/ruby.dat
new file mode 100644
index 00000000..f4e5e4e4
--- /dev/null
+++ b/tests/data/tree-construction/ruby.dat
@@ -0,0 +1,302 @@
+#data
+<html><ruby>a<rb>b<rb></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <ruby>
+|       "a"
+|       <rb>
+|         "b"
+|       <rb>
+
+#data
+<html><ruby>a<rb>b<rt></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <ruby>
+|       "a"
+|       <rb>
+|         "b"
+|       <rt>
+
+#data
+<html><ruby>a<rb>b<rtc></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <ruby>
+|       "a"
+|       <rb>
+|         "b"
+|       <rtc>
+
+#data
+<html><ruby>a<rb>b<rp></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <ruby>
+|       "a"
+|       <rb>
+|         "b"
+|       <rp>
+
+#data
+<html><ruby>a<rb>b<span></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,31): unexpected-end-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <ruby>
+|       "a"
+|       <rb>
+|         "b"
+|         <span>
+
+#data
+<html><ruby>a<rt>b<rb></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <ruby>
+|       "a"
+|       <rt>
+|         "b"
+|       <rb>
+
+#data
+<html><ruby>a<rt>b<rt></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <ruby>
+|       "a"
+|       <rt>
+|         "b"
+|       <rt>
+
+#data
+<html><ruby>a<rt>b<rtc></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <ruby>
+|       "a"
+|       <rt>
+|         "b"
+|       <rtc>
+
+#data
+<html><ruby>a<rt>b<rp></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <ruby>
+|       "a"
+|       <rt>
+|         "b"
+|       <rp>
+
+#data
+<html><ruby>a<rt>b<span></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,31): unexpected-end-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <ruby>
+|       "a"
+|       <rt>
+|         "b"
+|         <span>
+
+#data
+<html><ruby>a<rtc>b<rb></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <ruby>
+|       "a"
+|       <rtc>
+|         "b"
+|       <rb>
+
+#data
+<html><ruby>a<rtc>b<rt>c<rt>d</ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <ruby>
+|       "a"
+|       <rtc>
+|         "b"
+|         <rt>
+|           "c"
+|         <rt>
+|           "d"
+
+#data
+<html><ruby>a<rtc>b<rtc></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <ruby>
+|       "a"
+|       <rtc>
+|         "b"
+|       <rtc>
+
+#data
+<html><ruby>a<rtc>b<rp></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <ruby>
+|       "a"
+|       <rtc>
+|         "b"
+|         <rp>
+
+#data
+<html><ruby>a<rtc>b<span></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,32): unexpected-end-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <ruby>
+|       "a"
+|       <rtc>
+|         "b"
+|         <span>
+
+#data
+<html><ruby>a<rp>b<rb></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <ruby>
+|       "a"
+|       <rp>
+|         "b"
+|       <rb>
+
+#data
+<html><ruby>a<rp>b<rt></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <ruby>
+|       "a"
+|       <rp>
+|         "b"
+|       <rt>
+
+#data
+<html><ruby>a<rp>b<rtc></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <ruby>
+|       "a"
+|       <rp>
+|         "b"
+|       <rtc>
+
+#data
+<html><ruby>a<rp>b<rp></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <ruby>
+|       "a"
+|       <rp>
+|         "b"
+|       <rp>
+
+#data
+<html><ruby>a<rp>b<span></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,31): unexpected-end-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <ruby>
+|       "a"
+|       <rp>
+|         "b"
+|         <span>
+
+#data
+<html><ruby><rtc><ruby>a<rb>b<rt></ruby></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <ruby>
+|       <rtc>
+|         <ruby>
+|           "a"
+|           <rb>
+|             "b"
+|           <rt>
diff --git a/tests/data/tree-construction/scriptdata01.dat b/tests/data/tree-construction/scriptdata01.dat
new file mode 100644
index 00000000..6abcb657
--- /dev/null
+++ b/tests/data/tree-construction/scriptdata01.dat
@@ -0,0 +1,372 @@
+#data
+FOO<script>'Hello'</script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <script>
+|       "'Hello'"
+|     "BAR"
+
+#data
+FOO<script></script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <script>
+|     "BAR"
+
+#data
+FOO<script></script >BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <script>
+|     "BAR"
+
+#data
+FOO<script></script/>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,21): self-closing-flag-on-end-tag
+#new-errors
+(1:21) end-tag-with-trailing-solidus
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <script>
+|     "BAR"
+
+#data
+FOO<script></script/ >BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,20): unexpected-character-after-solidus-in-tag
+#new-errors
+(1:21) unexpected-solidus-in-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <script>
+|     "BAR"
+
+#data
+FOO<script type="text/plain"></scriptx>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,42): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <script>
+|       type="text/plain"
+|       "</scriptx>BAR"
+
+#data
+FOO<script></script foo=">" dd>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,31): attributes-in-end-tag
+#new-errors
+(1:31) end-tag-with-attributes
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <script>
+|     "BAR"
+
+#data
+FOO<script>'<'</script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <script>
+|       "'<'"
+|     "BAR"
+
+#data
+FOO<script>'<!'</script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <script>
+|       "'<!'"
+|     "BAR"
+
+#data
+FOO<script>'<!-'</script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <script>
+|       "'<!-'"
+|     "BAR"
+
+#data
+FOO<script>'<!--'</script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <script>
+|       "'<!--'"
+|     "BAR"
+
+#data
+FOO<script>'<!---'</script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <script>
+|       "'<!---'"
+|     "BAR"
+
+#data
+FOO<script>'<!-->'</script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <script>
+|       "'<!-->'"
+|     "BAR"
+
+#data
+FOO<script>'<!-- potato'</script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <script>
+|       "'<!-- potato'"
+|     "BAR"
+
+#data
+FOO<script>'<!-- <sCrIpt'</script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <script>
+|       "'<!-- <sCrIpt'"
+|     "BAR"
+
+#data
+FOO<script type="text/plain">'<!-- <sCrIpt>'</script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,56): expected-script-data-but-got-eof
+(1,56): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:57) eof-in-script-html-comment-like-text
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <script>
+|       type="text/plain"
+|       "'<!-- <sCrIpt>'</script>BAR"
+
+#data
+FOO<script type="text/plain">'<!-- <sCrIpt> -'</script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,58): expected-script-data-but-got-eof
+(1,58): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:59) eof-in-script-html-comment-like-text
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <script>
+|       type="text/plain"
+|       "'<!-- <sCrIpt> -'</script>BAR"
+
+#data
+FOO<script type="text/plain">'<!-- <sCrIpt> --'</script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,59): expected-script-data-but-got-eof
+(1,59): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:60) eof-in-script-html-comment-like-text
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <script>
+|       type="text/plain"
+|       "'<!-- <sCrIpt> --'</script>BAR"
+
+#data
+FOO<script>'<!-- <sCrIpt> -->'</script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <script>
+|       "'<!-- <sCrIpt> -->'"
+|     "BAR"
+
+#data
+FOO<script type="text/plain">'<!-- <sCrIpt> --!>'</script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,61): expected-script-data-but-got-eof
+(1,61): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:62) eof-in-script-html-comment-like-text
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <script>
+|       type="text/plain"
+|       "'<!-- <sCrIpt> --!>'</script>BAR"
+
+#data
+FOO<script type="text/plain">'<!-- <sCrIpt> -- >'</script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,61): expected-script-data-but-got-eof
+(1,61): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:62) eof-in-script-html-comment-like-text
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <script>
+|       type="text/plain"
+|       "'<!-- <sCrIpt> -- >'</script>BAR"
+
+#data
+FOO<script type="text/plain">'<!-- <sCrIpt '</script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,56): expected-script-data-but-got-eof
+(1,56): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:57) eof-in-script-html-comment-like-text
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <script>
+|       type="text/plain"
+|       "'<!-- <sCrIpt '</script>BAR"
+
+#data
+FOO<script type="text/plain">'<!-- <sCrIpt/'</script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+(1,56): expected-script-data-but-got-eof
+(1,56): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:57) eof-in-script-html-comment-like-text
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <script>
+|       type="text/plain"
+|       "'<!-- <sCrIpt/'</script>BAR"
+
+#data
+FOO<script type="text/plain">'<!-- <sCrIpt\'</script>BAR
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <script>
+|       type="text/plain"
+|       "'<!-- <sCrIpt\'"
+|     "BAR"
+
+#data
+FOO<script type="text/plain">'<!-- <sCrIpt/'</script>BAR</script>QUX
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <script>
+|       type="text/plain"
+|       "'<!-- <sCrIpt/'</script>BAR"
+|     "QUX"
+
+#data
+FOO<script><!--<script>-></script>--></script>QUX
+#errors
+(1,3): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "FOO"
+|     <script>
+|       "<!--<script>-></script>-->"
+|     "QUX"
diff --git a/tests/data/tree-construction/search-element.dat b/tests/data/tree-construction/search-element.dat
new file mode 100644
index 00000000..2866d7ec
--- /dev/null
+++ b/tests/data/tree-construction/search-element.dat
@@ -0,0 +1,46 @@
+#data
+<!doctype html><p>foo<search>bar<p>baz
+#errors
+(1,38): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       "foo"
+|     <search>
+|       "bar"
+|       <p>
+|         "baz"
+
+#data
+<!doctype html><search><p>foo</search>bar
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <search>
+|       <p>
+|         "foo"
+|     "bar"
+
+#data
+<!DOCTYPE html>xxx<svg><x><g><a><search><b>
+#errors
+ * (1,44) unexpected HTML-like start tag token in foreign content
+ * (1,44) unexpected end of file
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     "xxx"
+|     <svg svg>
+|       <svg x>
+|         <svg g>
+|           <svg a>
+|             <svg search>
+|     <b>
diff --git a/tests/data/tree-construction/svg.dat b/tests/data/tree-construction/svg.dat
new file mode 100644
index 00000000..a452e7af
--- /dev/null
+++ b/tests/data/tree-construction/svg.dat
@@ -0,0 +1,104 @@
+#data
+<svg><tr><td><title><tr>
+#errors
+(1:21) Unexpected <tr> tag
+(1:25) Unexpected EOF
+#document-fragment
+td
+#document
+| <svg svg>
+|   <svg tr>
+|     <svg td>
+|       <svg title>
+
+#data
+<svg><tr><td><title><tr>
+#errors
+(1:1) Unexpected <svg> tag
+(1:21) Unexpected <tr> tag
+(1:25) Unexpected EOF
+#document-fragment
+tr
+#document
+| <svg svg>
+|   <svg tr>
+|     <svg td>
+|       <svg title>
+
+#data
+<svg><thead><title><tbody>
+#errors
+(1:1) Unexpected <svg> tag
+(1:20) Unexpected <tbody> tag
+(1:27) Unexpected EOF
+#document-fragment
+thead
+#document
+| <svg svg>
+|   <svg thead>
+|     <svg title>
+
+#data
+<svg><tfoot><title><tbody>
+#errors
+(1:1) Unexpected <svg> tag
+(1:20) Unexpected <tbody> tag
+(1:27) Unexpected EOF
+#document-fragment
+tfoot
+#document
+| <svg svg>
+|   <svg tfoot>
+|     <svg title>
+
+#data
+<svg><tbody><title><tfoot>
+#errors
+(1:1) Unexpected <svg> tag
+(1:20) Unexpected <tfoot> tag
+(1:27) Unexpected EOF
+#document-fragment
+tbody
+#document
+| <svg svg>
+|   <svg tbody>
+|     <svg title>
+
+#data
+<svg><tbody><title></table>
+#errors
+(1:1) Unexpected <svg> tag
+(1:20) Unexpected </table> tag
+(1:28) Unexpected EOF
+#document-fragment
+tbody
+#document
+| <svg svg>
+|   <svg tbody>
+|     <svg title>
+
+#data
+<svg><thead><title></table>
+#errors
+(1:1) Unexpected <svg> tag
+(1:20) Unexpected </table> tag
+(1:28) Unexpected EOF
+#document-fragment
+tbody
+#document
+| <svg svg>
+|   <svg thead>
+|     <svg title>
+
+#data
+<svg><tfoot><title></table>
+#errors
+(1:1) Unexpected <svg> tag
+(1:20) Unexpected </table> tag
+(1:28) Unexpected EOF
+#document-fragment
+tbody
+#document
+| <svg svg>
+|   <svg tfoot>
+|     <svg title>
diff --git a/tests/data/tree-construction/tables01.dat b/tests/data/tree-construction/tables01.dat
new file mode 100644
index 00000000..40798881
--- /dev/null
+++ b/tests/data/tree-construction/tables01.dat
@@ -0,0 +1,323 @@
+#data
+<table><th>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,11): unexpected-cell-in-table-body
+(1,11): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <th>
+
+#data
+<table><td>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,11): unexpected-cell-in-table-body
+(1,11): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+
+#data
+<table><col foo='bar'>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,22): eof-in-table
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <colgroup>
+|         <col>
+|           foo="bar"
+
+#data
+<table><colgroup></html>foo
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,24): unexpected-end-tag
+(1,27): foster-parenting-character-in-table
+(1,27): foster-parenting-character-in-table
+(1,27): foster-parenting-character-in-table
+(1,27): eof-in-table
+#document
+| <html>
+|   <head>
+|   <body>
+|     "foo"
+|     <table>
+|       <colgroup>
+
+#data
+<table></table><p>foo
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|     <p>
+|       "foo"
+
+#data
+<table></body></caption></col></colgroup></html></tbody></td></tfoot></th></thead></tr><td>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,14): unexpected-end-tag
+(1,24): unexpected-end-tag
+(1,30): unexpected-end-tag
+(1,41): unexpected-end-tag
+(1,48): unexpected-end-tag
+(1,56): unexpected-end-tag
+(1,61): unexpected-end-tag
+(1,69): unexpected-end-tag
+(1,74): unexpected-end-tag
+(1,82): unexpected-end-tag
+(1,87): unexpected-end-tag
+(1,91): unexpected-cell-in-table-body
+(1,91): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+
+#data
+<table><select><option>3</select></table>
+#errors
+1:1: ERROR: Expected a doctype token
+1:8: ERROR: Start tag 'select' isn't allowed here. Currently open tags: html, body, table.
+1:16: ERROR: Start tag 'option' isn't allowed here. Currently open tags: html, body, table, select.
+1:24: ERROR: Character tokens aren't legal here
+1:25: ERROR: End tag 'select' isn't allowed here. Currently open tags: html, body, table, select, option.
+#document
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <option>
+|         "3"
+|     <table>
+
+#data
+<table><select><table></table></select></table>
+#errors
+1:1: ERROR: Expected a doctype token
+1:8: ERROR: Start tag 'select' isn't allowed here. Currently open tags: html, body, table.
+1:16: ERROR: Start tag 'table' isn't allowed here. Currently open tags: html, body, table, select.
+1:31: ERROR: End tag 'select' isn't allowed here. Currently open tags: html, body.
+1:40: ERROR: End tag 'table' isn't allowed here. Currently open tags: html, body.
+#document
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|     <table>
+|     <table>
+
+#data
+<table><select></table>
+#errors
+1:1: ERROR: Expected a doctype token
+1:8: ERROR: Start tag 'select' isn't allowed here. Currently open tags: html, body, table.
+#document
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|     <table>
+
+#data
+<table><select><option>A<tr><td>B</td></tr></table>
+#errors
+1:1: ERROR: Expected a doctype token
+1:8: ERROR: Start tag 'select' isn't allowed here. Currently open tags: html, body, table.
+1:16: ERROR: Start tag 'option' isn't allowed here. Currently open tags: html, body, table, select.
+1:24: ERROR: Character tokens aren't legal here
+#document
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <option>
+|         "A"
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             "B"
+
+#data
+<table><td></body></caption></col></colgroup></html>foo
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,11): unexpected-cell-in-table-body
+(1,18): unexpected-end-tag
+(1,28): unexpected-end-tag
+(1,34): unexpected-end-tag
+(1,45): unexpected-end-tag
+(1,52): unexpected-end-tag
+(1,55): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             "foo"
+
+#data
+<table><td>A</table>B
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,11): unexpected-cell-in-table-body
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             "A"
+|     "B"
+
+#data
+<table><tr><caption>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,20): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|       <caption>
+
+#data
+<table><tr></body></caption></col></colgroup></html></td></th><td>foo
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,18): unexpected-end-tag-in-table-row
+(1,28): unexpected-end-tag-in-table-row
+(1,34): unexpected-end-tag-in-table-row
+(1,45): unexpected-end-tag-in-table-row
+(1,52): unexpected-end-tag-in-table-row
+(1,57): unexpected-end-tag-in-table-row
+(1,62): unexpected-end-tag-in-table-row
+(1,69): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             "foo"
+
+#data
+<table><td><tr>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,11): unexpected-cell-in-table-body
+(1,15): eof-in-table
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|         <tr>
+
+#data
+<table><td><button><td>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,11): unexpected-cell-in-table-body
+(1,23): unexpected-cell-end-tag
+(1,23): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             <button>
+|           <td>
+
+#data
+<table><tr><td><svg><desc><td>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,30): unexpected-cell-end-tag
+(1,30): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             <svg svg>
+|               <svg desc>
+|           <td>
+
+#data
+<div><table><svg><foreignObject><select><table><s>
+#errors
+1:1: Expected a doctype token
+1:13: 'svg' tag isn't allowed here. Currently open tags: html, body, div, table.
+1:33: 'select' tag isn't allowed here. Currently open tags: html, body, div, table, svg, foreignobject.
+1:41: 'table' tag isn't allowed here. Currently open tags: html, body, div, table, svg, foreignobject, select.
+1:48: 's' tag isn't allowed here. Currently open tags: html, body, div, table.
+1:51: Premature end of file. Currently open tags: html, body, div, table, s.
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       <svg svg>
+|         <svg foreignObject>
+|           <select>
+|       <table>
+|       <s>
+|       <table>
+
+#data
+<table>a<!doctype html>
+#errors
+(1,1): expected-doctype-but-got-start-tag
+(1,8): illegal-character-token
+(1,9): illegal-doctype
+(1,24): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     "a"
+|     <table>
diff --git a/tests/data/tree-construction/template.dat b/tests/data/tree-construction/template.dat
new file mode 100644
index 00000000..45fb507c
--- /dev/null
+++ b/tests/data/tree-construction/template.dat
@@ -0,0 +1,1673 @@
+#data
+<body><template>Hello</template>
+#errors
+no doctype
+#document
+| <html>
+|   <head>
+|   <body>
+|     <template>
+|       content
+|         "Hello"
+
+#data
+<template>Hello</template>
+#errors
+no doctype
+#document
+| <html>
+|   <head>
+|     <template>
+|       content
+|         "Hello"
+|   <body>
+
+#data
+<template></template><div></div>
+#errors
+no doctype
+#document
+| <html>
+|   <head>
+|     <template>
+|       content
+|   <body>
+|     <div>
+
+#data
+<html><template>Hello</template>
+#errors
+no doctype
+#document
+| <html>
+|   <head>
+|     <template>
+|       content
+|         "Hello"
+|   <body>
+
+#data
+<head><template><div></div></template></head>
+#errors
+no doctype
+#document
+| <html>
+|   <head>
+|     <template>
+|       content
+|         <div>
+|   <body>
+
+#data
+<div><template><div><span></template><b>
+#errors
+ * (1,6) missing DOCTYPE
+ * (1,38) mismatched template end tag
+ * (1,41) unexpected end of file
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       <template>
+|         content
+|           <div>
+|             <span>
+|       <b>
+
+#data
+<div><template></div>Hello
+#errors
+ * (1,6) missing DOCTYPE
+ * (1,22) unexpected token in template
+ * (1,27) unexpected end of file in template
+ * (1,27) unexpected end of file
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       <template>
+|         content
+|           "Hello"
+
+#data
+<div></template></div>
+#errors
+ * (1,6) missing DOCTYPE
+ * (1,17) unexpected template end tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+
+#data
+<table><template></template></table>
+#errors
+no doctype
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <template>
+|         content
+
+#data
+<table><template></template></div>
+#errors
+ * (1,8) missing DOCTYPE
+ * (1,35) unexpected token in table - foster parenting
+ * (1,35) unexpected end tag
+ * (1,35) unexpected end of file
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <template>
+|         content
+
+#data
+<table><div><template></template></div>
+#errors
+ * (1,8) missing DOCTYPE
+ * (1,13) unexpected token in table - foster parenting
+ * (1,40) unexpected token in table - foster parenting
+ * (1,40) unexpected end of file
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       <template>
+|         content
+|     <table>
+
+#data
+<table><template></template><div></div>
+#errors
+no doctype
+bad div in table
+bad /div in table
+eof in table
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|     <table>
+|       <template>
+|         content
+
+#data
+<table>   <template></template></table>
+#errors
+no doctype
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       "   "
+|       <template>
+|         content
+
+#data
+<table><tbody><template></template></tbody>
+#errors
+no doctype
+eof in table
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <template>
+|           content
+
+#data
+<table><tbody><template></tbody></template>
+#errors
+no doctype
+bad /tbody
+eof in table
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <template>
+|           content
+
+#data
+<table><tbody><template></template></tbody></table>
+#errors
+no doctype
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <template>
+|           content
+
+#data
+<table><thead><template></template></thead>
+#errors
+no doctype
+eof in table
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <thead>
+|         <template>
+|           content
+
+#data
+<table><tfoot><template></template></tfoot>
+#errors
+no doctype
+eof in table
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tfoot>
+|         <template>
+|           content
+
+#data
+<select><template></template></select>
+#errors
+no doctype
+#document
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <template>
+|         content
+
+#data
+<select><template><option></option></template></select>
+#errors
+no doctype
+#document
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <template>
+|         content
+|           <option>
+
+#data
+<template><option></option></select><option></option></template>
+#errors
+no doctype
+bad /select
+#document
+| <html>
+|   <head>
+|     <template>
+|       content
+|         <option>
+|         <option>
+|   <body>
+
+#data
+<select><template></template><option></select>
+#errors
+no doctype
+#document
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <template>
+|         content
+|       <option>
+
+#data
+<select><option><template></template></select>
+#errors
+no doctype
+#document
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <option>
+|         <template>
+|           content
+
+#data
+<select><template>
+#errors
+no doctype
+eof in template
+eof in select
+#document
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <template>
+|         content
+
+#data
+<select><option></option><template>
+#errors
+no doctype
+eof in template
+eof in select
+#document
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <option>
+|       <template>
+|         content
+
+#data
+<select><option></option><template><option>
+#errors
+no doctype
+eof in template
+eof in select
+#document
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <option>
+|       <template>
+|         content
+|           <option>
+
+#data
+<table><thead><template><td></template></table>
+#errors
+ * (1,8) missing DOCTYPE
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <thead>
+|         <template>
+|           content
+|             <td>
+
+#data
+<table><template><thead></template></table>
+#errors
+no doctype
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <template>
+|         content
+|           <thead>
+
+#data
+<body><table><template><td></tr><div></template></table>
+#errors
+no doctype
+bad </tr>
+missing </div>
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <template>
+|         content
+|           <td>
+|             <div>
+
+#data
+<table><template><thead></template></thead></table>
+#errors
+no doctype
+bad /thead after /template
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <template>
+|         content
+|           <thead>
+
+#data
+<table><thead><template><tr></template></table>
+#errors
+no doctype
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <thead>
+|         <template>
+|           content
+|             <tr>
+
+#data
+<table><template><tr></template></table>
+#errors
+no doctype
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <template>
+|         content
+|           <tr>
+
+#data
+<table><tr><template><td>
+#errors
+no doctype
+eof in template
+eof in table
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <template>
+|             content
+|               <td>
+
+#data
+<table><template><tr><template><td></template></tr></template></table>
+#errors
+no doctype
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <template>
+|         content
+|           <tr>
+|             <template>
+|               content
+|                 <td>
+
+#data
+<table><template><tr><template><td></td></template></tr></template></table>
+#errors
+no doctype
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <template>
+|         content
+|           <tr>
+|             <template>
+|               content
+|                 <td>
+
+#data
+<table><template><td></template>
+#errors
+no doctype
+eof in table
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <template>
+|         content
+|           <td>
+
+#data
+<body><template><td></td></template>
+#errors
+no doctype
+#document
+| <html>
+|   <head>
+|   <body>
+|     <template>
+|       content
+|         <td>
+
+#data
+<body><template><template><tr></tr></template><td></td></template>
+#errors
+no doctype
+#document
+| <html>
+|   <head>
+|   <body>
+|     <template>
+|       content
+|         <template>
+|           content
+|             <tr>
+|         <td>
+
+#data
+<table><colgroup><template><col>
+#errors
+no doctype
+eof in template
+eof in table
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <colgroup>
+|         <template>
+|           content
+|             <col>
+
+#data
+<frameset><template><frame></frame></template></frameset>
+#errors
+ * (1,11) missing DOCTYPE
+ * (1,21) unexpected start tag token
+ * (1,36) unexpected end tag token
+ * (1,47) unexpected end tag token
+#document
+| <html>
+|   <head>
+|   <frameset>
+|     <frame>
+
+#data
+<template><frame></frame></frameset><frame></frame></template>
+#errors
+ * (1,11) missing DOCTYPE
+ * (1,18) unexpected start tag
+ * (1,26) unexpected end tag
+ * (1,37) unexpected end tag
+ * (1,44) unexpected start tag
+ * (1,52) unexpected end tag
+#document
+| <html>
+|   <head>
+|     <template>
+|       content
+|   <body>
+
+#data
+<template><div><frameset><span></span></div><span></span></template>
+#errors
+no doctype
+bad frameset
+#document
+| <html>
+|   <head>
+|     <template>
+|       content
+|         <div>
+|           <span>
+|         <span>
+|   <body>
+
+#data
+<body><template><div><frameset><span></span></div><span></span></template></body>
+#errors
+no doctype
+bad frameset
+#document
+| <html>
+|   <head>
+|   <body>
+|     <template>
+|       content
+|         <div>
+|           <span>
+|         <span>
+
+#data
+<body><template><script>var i = 1;</script><td></td></template>
+#errors
+no doctype
+#document
+| <html>
+|   <head>
+|   <body>
+|     <template>
+|       content
+|         <script>
+|           "var i = 1;"
+|         <td>
+
+#data
+<body><template><tr><div></div></tr></template>
+#errors
+no doctype
+foster-parented div
+foster-parented /div
+#document
+| <html>
+|   <head>
+|   <body>
+|     <template>
+|       content
+|         <tr>
+|         <div>
+
+#data
+<body><template><tr></tr><td></td></template>
+#errors
+no doctype
+unexpected <td>
+#document
+| <html>
+|   <head>
+|   <body>
+|     <template>
+|       content
+|         <tr>
+|         <tr>
+|           <td>
+
+#data
+<body><template><td></td></tr><td></td></template>
+#errors
+no doctype
+bad </tr>
+#document
+| <html>
+|   <head>
+|   <body>
+|     <template>
+|       content
+|         <td>
+|         <td>
+
+#data
+<body><template><td></td><tbody><td></td></template>
+#errors
+no doctype
+bad <tbody>
+#document
+| <html>
+|   <head>
+|   <body>
+|     <template>
+|       content
+|         <td>
+|         <td>
+
+#data
+<body><template><td></td><caption></caption><td></td></template>
+#errors
+ * (1,7) missing DOCTYPE
+ * (1,35) unexpected start tag in table row
+ * (1,45) unexpected end tag in table row
+#document
+| <html>
+|   <head>
+|   <body>
+|     <template>
+|       content
+|         <td>
+|         <td>
+
+#data
+<body><template><td></td><colgroup></caption><td></td></template>
+#errors
+ * (1,7) missing DOCTYPE
+ * (1,36) unexpected start tag in table row
+ * (1,46) unexpected end tag in table row
+#document
+| <html>
+|   <head>
+|   <body>
+|     <template>
+|       content
+|         <td>
+|         <td>
+
+#data
+<body><template><td></td></table><td></td></template>
+#errors
+no doctype
+bad </table>
+#document
+| <html>
+|   <head>
+|   <body>
+|     <template>
+|       content
+|         <td>
+|         <td>
+
+#data
+<body><template><tr></tr><tbody><tr></tr></template>
+#errors
+no doctype
+bad <tbody>
+#document
+| <html>
+|   <head>
+|   <body>
+|     <template>
+|       content
+|         <tr>
+|         <tr>
+
+#data
+<body><template><tr></tr><caption><tr></tr></template>
+#errors
+no doctype
+bad <caption>
+#document
+| <html>
+|   <head>
+|   <body>
+|     <template>
+|       content
+|         <tr>
+|         <tr>
+
+#data
+<body><template><tr></tr></table><tr></tr></template>
+#errors
+no doctype
+bad </table>
+#document
+| <html>
+|   <head>
+|   <body>
+|     <template>
+|       content
+|         <tr>
+|         <tr>
+
+#data
+<body><template><thead></thead><caption></caption><tbody></tbody></template>
+#errors
+no doctype
+#document
+| <html>
+|   <head>
+|   <body>
+|     <template>
+|       content
+|         <thead>
+|         <caption>
+|         <tbody>
+
+#data
+<body><template><thead></thead></table><tbody></tbody></template></body>
+#errors
+no doctype
+bad </table>
+#document
+| <html>
+|   <head>
+|   <body>
+|     <template>
+|       content
+|         <thead>
+|         <tbody>
+
+#data
+<body><template><div><tr></tr></div></template>
+#errors
+no doctype
+bad tr
+bad /tr
+#document
+| <html>
+|   <head>
+|   <body>
+|     <template>
+|       content
+|         <div>
+
+#data
+<body><template><em>Hello</em></template>
+#errors
+no doctype
+#document
+| <html>
+|   <head>
+|   <body>
+|     <template>
+|       content
+|         <em>
+|           "Hello"
+
+#data
+<body><template><!--comment--></template>
+#errors
+no doctype
+#document
+| <html>
+|   <head>
+|   <body>
+|     <template>
+|       content
+|         <!-- comment -->
+
+#data
+<body><template><style></style><td></td></template>
+#errors
+no doctype
+#document
+| <html>
+|   <head>
+|   <body>
+|     <template>
+|       content
+|         <style>
+|         <td>
+
+#data
+<body><template><meta><td></td></template>
+#errors
+no doctype
+#document
+| <html>
+|   <head>
+|   <body>
+|     <template>
+|       content
+|         <meta>
+|         <td>
+
+#data
+<body><template><link><td></td></template>
+#errors
+no doctype
+#document
+| <html>
+|   <head>
+|   <body>
+|     <template>
+|       content
+|         <link>
+|         <td>
+
+#data
+<body><table><colgroup><template><col></col></template></colgroup></table></body>
+#errors
+no doctype
+bad /col
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <colgroup>
+|         <template>
+|           content
+|             <col>
+
+#data
+<body a=b><template><div></div><body c=d><div></div></body></template></body>
+#errors
+no doctype
+bad <body>
+bad </body>
+#document
+| <html>
+|   <head>
+|   <body>
+|     a="b"
+|     <template>
+|       content
+|         <div>
+|         <div>
+
+#data
+<html a=b><template><div><html b=c><span></template>
+#errors
+no doctype
+bad <html>
+missing end tags in template
+#document
+| <html>
+|   a="b"
+|   <head>
+|     <template>
+|       content
+|         <div>
+|           <span>
+|   <body>
+
+#data
+<html a=b><template><col></col><html b=c><col></col></template>
+#errors
+no doctype
+bad /col
+bad html
+bad /col
+#document
+| <html>
+|   a="b"
+|   <head>
+|     <template>
+|       content
+|         <col>
+|         <col>
+|   <body>
+
+#data
+<html a=b><template><frame></frame><html b=c><frame></frame></template>
+#errors
+no doctype
+bad frame
+bad /frame
+bad html
+bad frame
+bad /frame
+#document
+| <html>
+|   a="b"
+|   <head>
+|     <template>
+|       content
+|   <body>
+
+#data
+<body><template><tr></tr><template></template><td></td></template>
+#errors
+no doctype
+unexpected <td>
+#document
+| <html>
+|   <head>
+|   <body>
+|     <template>
+|       content
+|         <tr>
+|         <template>
+|           content
+|         <tr>
+|           <td>
+
+#data
+<body><template><thead></thead><template><tr></tr></template><tr></tr><tfoot></tfoot></template>
+#errors
+no doctype
+#document
+| <html>
+|   <head>
+|   <body>
+|     <template>
+|       content
+|         <thead>
+|         <template>
+|           content
+|             <tr>
+|         <tbody>
+|           <tr>
+|         <tfoot>
+
+#data
+<body><template><template><b><template></template></template>text</template>
+#errors
+no doctype
+missing </b>
+#document
+| <html>
+|   <head>
+|   <body>
+|     <template>
+|       content
+|         <template>
+|           content
+|             <b>
+|               <template>
+|                 content
+|         "text"
+
+#data
+<body><template><col><colgroup>
+#errors
+no doctype
+bad colgroup
+eof in template
+#document
+| <html>
+|   <head>
+|   <body>
+|     <template>
+|       content
+|         <col>
+
+#data
+<body><template><col></colgroup>
+#errors
+no doctype
+bogus /colgroup
+eof in template
+#document
+| <html>
+|   <head>
+|   <body>
+|     <template>
+|       content
+|         <col>
+
+#data
+<body><template><col><colgroup></template></body>
+#errors
+no doctype
+bad colgroup
+#document
+| <html>
+|   <head>
+|   <body>
+|     <template>
+|       content
+|         <col>
+
+#data
+<body><template><col><div>
+#errors
+ * (1,7) missing DOCTYPE
+ * (1,27) unexpected token
+ * (1,27) unexpected end of file in template
+#document
+| <html>
+|   <head>
+|   <body>
+|     <template>
+|       content
+|         <col>
+
+#data
+<body><template><col></div>
+#errors
+no doctype
+bad /div
+eof in template
+#document
+| <html>
+|   <head>
+|   <body>
+|     <template>
+|       content
+|         <col>
+
+#data
+<body><template><col>Hello
+#errors
+no doctype
+(1,27): foster-parenting-character
+(1,27): foster-parenting-character
+(1,27): foster-parenting-character
+(1,27): foster-parenting-character
+(1,27): foster-parenting-character
+eof in template
+#document
+| <html>
+|   <head>
+|   <body>
+|     <template>
+|       content
+|         <col>
+
+#data
+<body><template><i><menu>Foo</i>
+#errors
+no doctype
+missing /menu
+eof in template
+#document
+| <html>
+|   <head>
+|   <body>
+|     <template>
+|       content
+|         <i>
+|         <menu>
+|           <i>
+|             "Foo"
+
+#data
+<body><template></div><div>Foo</div><template></template><tr></tr>
+#errors
+no doctype
+bogus /div
+bogus tr
+bogus /tr
+eof in template
+#document
+| <html>
+|   <head>
+|   <body>
+|     <template>
+|       content
+|         <div>
+|           "Foo"
+|         <template>
+|           content
+
+#data
+<body><div><template></div><tr><td>Foo</td></tr></template>
+#errors
+ * (1,7) missing DOCTYPE
+ * (1,28) unexpected token in template
+ * (1,60) unexpected end of file
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       <template>
+|         content
+|           <tr>
+|             <td>
+|               "Foo"
+
+#data
+<template></figcaption><sub><table></table>
+#errors
+no doctype
+bad /figcaption
+eof in template
+#document
+| <html>
+|   <head>
+|     <template>
+|       content
+|         <sub>
+|           <table>
+|   <body>
+
+#data
+<template><template>
+#errors
+no doctype
+eof in template
+eof in template
+#document
+| <html>
+|   <head>
+|     <template>
+|       content
+|         <template>
+|           content
+|   <body>
+
+#data
+<template><div>
+#errors
+no doctype
+eof in template
+#document
+| <html>
+|   <head>
+|     <template>
+|       content
+|         <div>
+|   <body>
+
+#data
+<template><template><div>
+#errors
+no doctype
+eof in template
+eof in template
+#document
+| <html>
+|   <head>
+|     <template>
+|       content
+|         <template>
+|           content
+|             <div>
+|   <body>
+
+#data
+<template><template><table>
+#errors
+no doctype
+eof in template
+eof in template
+#document
+| <html>
+|   <head>
+|     <template>
+|       content
+|         <template>
+|           content
+|             <table>
+|   <body>
+
+#data
+<template><template><tbody>
+#errors
+no doctype
+eof in template
+eof in template
+#document
+| <html>
+|   <head>
+|     <template>
+|       content
+|         <template>
+|           content
+|             <tbody>
+|   <body>
+
+#data
+<template><template><tr>
+#errors
+no doctype
+eof in template
+eof in template
+#document
+| <html>
+|   <head>
+|     <template>
+|       content
+|         <template>
+|           content
+|             <tr>
+|   <body>
+
+#data
+<template><template><td>
+#errors
+no doctype
+eof in template
+eof in template
+#document
+| <html>
+|   <head>
+|     <template>
+|       content
+|         <template>
+|           content
+|             <td>
+|   <body>
+
+#data
+<template><template><caption>
+#errors
+no doctype
+eof in template
+eof in template
+#document
+| <html>
+|   <head>
+|     <template>
+|       content
+|         <template>
+|           content
+|             <caption>
+|   <body>
+
+#data
+<template><template><colgroup>
+#errors
+no doctype
+eof in template
+eof in template
+#document
+| <html>
+|   <head>
+|     <template>
+|       content
+|         <template>
+|           content
+|             <colgroup>
+|   <body>
+
+#data
+<template><template><col>
+#errors
+no doctype
+eof in template
+eof in template
+#document
+| <html>
+|   <head>
+|     <template>
+|       content
+|         <template>
+|           content
+|             <col>
+|   <body>
+
+#data
+<template><template><tbody><select>
+#errors
+ * (1,11) missing DOCTYPE
+ * (1,36) unexpected token in table - foster parenting
+ * (1,36) unexpected end of file in template
+ * (1,36) unexpected end of file in template
+#document
+| <html>
+|   <head>
+|     <template>
+|       content
+|         <template>
+|           content
+|             <tbody>
+|             <select>
+|   <body>
+
+#data
+<template><template><table>Foo
+#errors
+no doctype
+foster-parenting text F
+foster-parenting text o
+foster-parenting text o
+eof
+eof
+#document
+| <html>
+|   <head>
+|     <template>
+|       content
+|         <template>
+|           content
+|             "Foo"
+|             <table>
+|   <body>
+
+#data
+<template><template><frame>
+#errors
+no doctype
+bad tag
+eof
+eof
+#document
+| <html>
+|   <head>
+|     <template>
+|       content
+|         <template>
+|           content
+|   <body>
+
+#data
+<template><template><script>var i
+#errors
+no doctype
+eof in script
+eof in template
+eof in template
+#document
+| <html>
+|   <head>
+|     <template>
+|       content
+|         <template>
+|           content
+|             <script>
+|               "var i"
+|   <body>
+
+#data
+<template><template><style>var i
+#errors
+no doctype
+eof in style
+eof in template
+eof in template
+#document
+| <html>
+|   <head>
+|     <template>
+|       content
+|         <template>
+|           content
+|             <style>
+|               "var i"
+|   <body>
+
+#data
+<template><table></template><body><span>Foo
+#errors
+no doctype
+missing /table
+bad eof
+#document
+| <html>
+|   <head>
+|     <template>
+|       content
+|         <table>
+|   <body>
+|     <span>
+|       "Foo"
+
+#data
+<template><td></template><body><span>Foo
+#errors
+no doctype
+bad eof
+#document
+| <html>
+|   <head>
+|     <template>
+|       content
+|         <td>
+|   <body>
+|     <span>
+|       "Foo"
+
+#data
+<template><object></template><body><span>Foo
+#errors
+no doctype
+missing /object
+bad eof
+#document
+| <html>
+|   <head>
+|     <template>
+|       content
+|         <object>
+|   <body>
+|     <span>
+|       "Foo"
+
+#data
+<template><svg><template>
+#errors
+no doctype
+eof in template
+#document
+| <html>
+|   <head>
+|     <template>
+|       content
+|         <svg svg>
+|           <svg template>
+|   <body>
+
+#data
+<template><svg><foo><template><foreignObject><div></template><div>
+#errors
+no doctype
+ugly template closure
+bad eof
+#document
+| <html>
+|   <head>
+|     <template>
+|       content
+|         <svg svg>
+|           <svg foo>
+|             <svg template>
+|               <svg foreignObject>
+|                 <div>
+|   <body>
+|     <div>
+
+#data
+<dummy><template><span></dummy>
+#errors
+no doctype
+bad end tag </dummy>
+eof in template
+eof in dummy
+#document
+| <html>
+|   <head>
+|   <body>
+|     <dummy>
+|       <template>
+|         content
+|           <span>
+
+#data
+<body><table><tr><td><select><template>Foo</template><caption>A</table>
+#errors
+no doctype
+(1,62): unexpected-caption-in-select-in-table
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             <select>
+|               <template>
+|                 content
+|                   "Foo"
+|       <caption>
+|         "A"
+
+#data
+<body></body><template>
+#errors
+no doctype
+(1,23): template-after-body
+(1,24): eof-in-template
+#document
+| <html>
+|   <head>
+|   <body>
+|     <template>
+|       content
+
+#data
+<head></head><template>
+#errors
+no doctype
+(1,23): template-after-head
+(1,24): eof-in-template
+#document
+| <html>
+|   <head>
+|     <template>
+|       content
+|   <body>
+
+#data
+<head></head><template>Foo</template>
+#errors
+no doctype
+(1,23): template-after-head
+#document
+| <html>
+|   <head>
+|     <template>
+|       content
+|         "Foo"
+|   <body>
+
+#data
+<html><head></head><template></template><head>
+#errors
+no doctype
+template-after-head
+head-after-head
+#document
+| <html>
+|   <head>
+|     <template>
+|       content
+|   <body>
+
+#data
+<!DOCTYPE HTML><dummy><table><template><table><template><table><script>
+#errors
+eof script
+eof template
+eof template
+eof table
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <dummy>
+|       <table>
+|         <template>
+|           content
+|             <table>
+|               <template>
+|                 content
+|                   <table>
+|                     <script>
+
+#data
+<template><a><table><a>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+(1,23): foster-parenting-start-tag
+(1,23): unexpected-start-tag
+(1,23): formatting-element-not-in-scope
+(1,24): eof-in-template
+#document
+| <html>
+|   <head>
+|     <template>
+|       content
+|         <a>
+|           <a>
+|           <table>
+|   <body>
+
+#data
+<template><form><input name="q"></form><div>second</div></template>
+#errors
+#document-fragment
+template
+#document
+| <template>
+|   content
+|     <form>
+|       <input>
+|         name="q"
+|     <div>
+|       "second"
+
+#data
+<!DOCTYPE HTML><template><tr><td>cell</td></tr></template>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <template>
+|       content
+|         <tr>
+|           <td>
+|             "cell"
+|   <body>
+
+#data
+<!DOCTYPE HTML><template> <tr> <td>cell</td> </tr> </template>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <template>
+|       content
+|         " "
+|         <tr>
+|           " "
+|           <td>
+|             "cell"
+|           " "
+|         " "
+|   <body>
+
+#data
+<!DOCTYPE HTML><template><tr><td>cell</td></tr>a</template>
+#errors
+(1,59): foster-parenting-character
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <template>
+|       content
+|         <tr>
+|           <td>
+|             "cell"
+|         "a"
+|   <body>
diff --git a/tests/data/tree-construction/tests1.dat b/tests/data/tree-construction/tests1.dat
new file mode 100644
index 00000000..15d496eb
--- /dev/null
+++ b/tests/data/tree-construction/tests1.dat
@@ -0,0 +1,1958 @@
+#data
+Test
+#errors
+(1,0): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "Test"
+
+#data
+<p>One<p>Two
+#errors
+(1,3): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       "One"
+|     <p>
+|       "Two"
+
+#data
+Line1<br>Line2<br>Line3<br>Line4
+#errors
+(1,0): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "Line1"
+|     <br>
+|     "Line2"
+|     <br>
+|     "Line3"
+|     <br>
+|     "Line4"
+
+#data
+<html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+
+#data
+<head>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+
+#data
+<body>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+
+#data
+<html><head>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+
+#data
+<html><head></head>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+
+#data
+<html><head></head><body>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+
+#data
+<html><head></head><body></body>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+
+#data
+<html><head><body></body></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+
+#data
+<html><head></body></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+
+#data
+<html><head><body></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+
+#data
+<html><body></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+
+#data
+<body></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+
+#data
+<head></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+
+#data
+</head>
+#errors
+(1,7): expected-doctype-but-got-end-tag
+#document
+| <html>
+|   <head>
+|   <body>
+
+#data
+</body>
+#errors
+(1,7): expected-doctype-but-got-end-tag element.
+#document
+| <html>
+|   <head>
+|   <body>
+
+#data
+</html>
+#errors
+(1,7): expected-doctype-but-got-end-tag element.
+#document
+| <html>
+|   <head>
+|   <body>
+
+#data
+<b><table><td><i></table>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,14): unexpected-cell-in-table-body
+(1,25): unexpected-cell-end-tag
+(1,25): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <b>
+|       <table>
+|         <tbody>
+|           <tr>
+|             <td>
+|               <i>
+
+#data
+<b><table><td></b><i></table>X
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,14): unexpected-cell-in-table-body
+(1,18): unexpected-end-tag
+(1,29): unexpected-cell-end-tag
+(1,30): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <b>
+|       <table>
+|         <tbody>
+|           <tr>
+|             <td>
+|               <i>
+|       "X"
+
+#data
+<h1>Hello<h2>World
+#errors
+(1,4): expected-doctype-but-got-start-tag
+(1,13): unexpected-start-tag
+(1,18): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <h1>
+|       "Hello"
+|     <h2>
+|       "World"
+
+#data
+<a><p>X<a>Y</a>Z</p></a>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,10): unexpected-start-tag-implies-end-tag
+(1,10): adoption-agency-1.3
+(1,24): unexpected-end-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <a>
+|     <p>
+|       <a>
+|         "X"
+|       <a>
+|         "Y"
+|       "Z"
+
+#data
+<b><button>foo</b>bar
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,18): adoption-agency-1.3
+(1,21): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <b>
+|     <button>
+|       <b>
+|         "foo"
+|       "bar"
+
+#data
+<!DOCTYPE html><span><button>foo</span>bar
+#errors
+(1,39): unexpected-end-tag
+(1,42): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <span>
+|       <button>
+|         "foobar"
+
+#data
+<p><b><div><marquee></p></b></div>X
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,11): unexpected-end-tag
+(1,24): unexpected-end-tag
+(1,28): unexpected-end-tag
+(1,34): end-tag-too-early
+(1,35): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <b>
+|     <div>
+|       <b>
+|         <marquee>
+|           <p>
+|           "X"
+
+#data
+<script><div></script></div><title><p></title><p><p>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,28): unexpected-end-tag
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<div>"
+|     <title>
+|       "<p>"
+|   <body>
+|     <p>
+|     <p>
+
+#data
+<!--><div>--<!-->
+#errors
+(1,5): incorrect-comment
+(1,10): expected-doctype-but-got-start-tag
+(1,17): incorrect-comment
+(1,17): expected-closing-tag-but-got-eof
+#new-errors
+(1:5) abrupt-closing-of-empty-comment
+(1:17) abrupt-closing-of-empty-comment
+#document
+| <!--  -->
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       "--"
+|       <!--  -->
+
+#data
+<p><hr></p>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,11): unexpected-end-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|     <hr>
+|     <p>
+
+#data
+<select><b><option><select><option></b></select>X
+#errors
+1:1: ERROR: Expected a doctype token
+1:20: ERROR: Start tag 'select' isn't allowed here. Currently open tags: html, body, select, b, option.
+1:36: ERROR: End tag 'b' isn't allowed here. Currently open tags: html, body, b, select, option.
+1:50: ERROR: Premature end of file. Currently open tags: html, body, b.
+#document
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <b>
+|         <option>
+|     <b>
+|       <option>
+|     "X"
+
+#data
+<a><table><td><a><table></table><a></tr><a></table><b>X</b>C<a>Y
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,14): unexpected-cell-in-table-body
+(1,35): unexpected-start-tag-implies-end-tag
+(1,40): unexpected-cell-end-tag
+(1,43): unexpected-start-tag-implies-table-voodoo
+(1,43): unexpected-start-tag-implies-end-tag
+(1,43): unexpected-end-tag
+(1,63): unexpected-start-tag-implies-end-tag
+(1,64): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <a>
+|       <a>
+|       <table>
+|         <tbody>
+|           <tr>
+|             <td>
+|               <a>
+|                 <table>
+|               <a>
+|     <a>
+|       <b>
+|         "X"
+|       "C"
+|     <a>
+|       "Y"
+
+#data
+<a X>0<b>1<a Y>2
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,15): unexpected-start-tag-implies-end-tag
+(1,15): adoption-agency-1.3
+(1,16): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <a>
+|       x=""
+|       "0"
+|       <b>
+|         "1"
+|     <b>
+|       <a>
+|         y=""
+|         "2"
+
+#data
+<!-----><font><div>hello<table>excite!<b>me!<th><i>please!</tr><!--X-->
+#errors
+(1,14): expected-doctype-but-got-start-tag
+(1,41): unexpected-start-tag-implies-table-voodoo
+(1,48): foster-parenting-character-in-table
+(1,48): foster-parenting-character-in-table
+(1,48): foster-parenting-character-in-table
+(1,48): foster-parenting-character-in-table
+(1,48): foster-parenting-character-in-table
+(1,48): foster-parenting-character-in-table
+(1,48): foster-parenting-character-in-table
+(1,48): foster-parenting-character-in-table
+(1,48): foster-parenting-character-in-table
+(1,48): foster-parenting-character-in-table
+(1,48): unexpected-cell-in-table-body
+(1,63): unexpected-cell-end-tag
+(1,71): eof-in-table
+#document
+| <!-- - -->
+| <html>
+|   <head>
+|   <body>
+|     <font>
+|       <div>
+|         "helloexcite!"
+|         <b>
+|           "me!"
+|         <table>
+|           <tbody>
+|             <tr>
+|               <th>
+|                 <i>
+|                   "please!"
+|             <!-- X -->
+
+#data
+<!DOCTYPE html><li>hello<li>world<ul>how<li>do</ul>you</body><!--do-->
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <li>
+|       "hello"
+|     <li>
+|       "world"
+|       <ul>
+|         "how"
+|         <li>
+|           "do"
+|       "you"
+|   <!-- do -->
+
+#data
+<!DOCTYPE html>A<option>B<optgroup>C<select>D</option>E
+#errors
+(1,54): unexpected-end-tag-in-select
+(1,55): eof-in-select
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     "A"
+|     <option>
+|       "B"
+|     <optgroup>
+|       "C"
+|       <select>
+|         "DE"
+
+#data
+<
+#errors
+(1,1): expected-tag-name
+(1,1): expected-doctype-but-got-chars
+#new-errors
+(1:2) eof-before-tag-name
+#document
+| <html>
+|   <head>
+|   <body>
+|     "<"
+
+#data
+<#
+#errors
+(1,1): expected-tag-name
+(1,1): expected-doctype-but-got-chars
+#new-errors
+(1:2) invalid-first-character-of-tag-name
+#document
+| <html>
+|   <head>
+|   <body>
+|     "<#"
+
+#data
+</
+#errors
+(1,2): expected-closing-tag-but-got-eof
+(1,2): expected-doctype-but-got-chars
+#new-errors
+(1:3) eof-before-tag-name
+#document
+| <html>
+|   <head>
+|   <body>
+|     "</"
+
+#data
+</#
+#errors
+(1,2): expected-closing-tag-but-got-char
+(1,3): expected-doctype-but-got-eof
+#new-errors
+(1:3) invalid-first-character-of-tag-name
+#document
+| <!-- # -->
+| <html>
+|   <head>
+|   <body>
+
+#data
+<?
+#errors
+(1,1): expected-tag-name-but-got-question-mark
+(1,2): expected-doctype-but-got-eof
+#new-errors
+(1:2) unexpected-question-mark-instead-of-tag-name
+#document
+| <!-- ? -->
+| <html>
+|   <head>
+|   <body>
+
+#data
+<?#
+#errors
+(1,1): expected-tag-name-but-got-question-mark
+(1,3): expected-doctype-but-got-eof
+#new-errors
+(1:2) unexpected-question-mark-instead-of-tag-name
+#document
+| <!-- ?# -->
+| <html>
+|   <head>
+|   <body>
+
+#data
+<!
+#errors
+(1,2): expected-dashes-or-doctype
+(1,2): expected-doctype-but-got-eof
+#new-errors
+(1:3) incorrectly-opened-comment
+#document
+| <!--  -->
+| <html>
+|   <head>
+|   <body>
+
+#data
+<!#
+#errors
+(1,2): expected-dashes-or-doctype
+(1,3): expected-doctype-but-got-eof
+#new-errors
+(1:3) incorrectly-opened-comment
+#document
+| <!-- # -->
+| <html>
+|   <head>
+|   <body>
+
+#data
+<?COMMENT?>
+#errors
+(1,1): expected-tag-name-but-got-question-mark
+(1,11): expected-doctype-but-got-eof
+#new-errors
+(1:2) unexpected-question-mark-instead-of-tag-name
+#document
+| <!-- ?COMMENT? -->
+| <html>
+|   <head>
+|   <body>
+
+#data
+<!COMMENT>
+#errors
+(1,2): expected-dashes-or-doctype
+(1,10): expected-doctype-but-got-eof
+#new-errors
+(1:3) incorrectly-opened-comment
+#document
+| <!-- COMMENT -->
+| <html>
+|   <head>
+|   <body>
+
+#data
+</ COMMENT >
+#errors
+(1,2): expected-closing-tag-but-got-char
+(1,12): expected-doctype-but-got-eof
+#new-errors
+(1:3) invalid-first-character-of-tag-name
+#document
+| <!--  COMMENT  -->
+| <html>
+|   <head>
+|   <body>
+
+#data
+<?COM--MENT?>
+#errors
+(1,1): expected-tag-name-but-got-question-mark
+(1,13): expected-doctype-but-got-eof
+#new-errors
+(1:2) unexpected-question-mark-instead-of-tag-name
+#document
+| <!-- ?COM--MENT? -->
+| <html>
+|   <head>
+|   <body>
+
+#data
+<!COM--MENT>
+#errors
+(1,2): expected-dashes-or-doctype
+(1,12): expected-doctype-but-got-eof
+#new-errors
+(1:3) incorrectly-opened-comment
+#document
+| <!-- COM--MENT -->
+| <html>
+|   <head>
+|   <body>
+
+#data
+</ COM--MENT >
+#errors
+(1,2): expected-closing-tag-but-got-char
+(1,14): expected-doctype-but-got-eof
+#new-errors
+(1:3) invalid-first-character-of-tag-name
+#document
+| <!--  COM--MENT  -->
+| <html>
+|   <head>
+|   <body>
+
+#data
+<!DOCTYPE html><style> EOF
+#errors
+(1,26): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <style>
+|       " EOF"
+|   <body>
+
+#data
+<!DOCTYPE html><script> <!-- </script> --> </script> EOF
+#errors
+(1,52): unexpected-end-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       " <!-- "
+|     " "
+|   <body>
+|     "-->  EOF"
+
+#data
+<b><p></b>TEST
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,10): adoption-agency-1.3
+#document
+| <html>
+|   <head>
+|   <body>
+|     <b>
+|     <p>
+|       <b>
+|       "TEST"
+
+#data
+<p id=a><b><p id=b></b>TEST
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,19): unexpected-end-tag
+(1,23): adoption-agency-1.2
+#document
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       id="a"
+|       <b>
+|     <p>
+|       id="b"
+|       "TEST"
+
+#data
+<b id=a><p><b id=b></p></b>TEST
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,23): unexpected-end-tag
+(1,27): adoption-agency-1.2
+(1,31): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <b>
+|       id="a"
+|       <p>
+|         <b>
+|           id="b"
+|       "TEST"
+
+#data
+<!DOCTYPE html><title>U-test</title><body><div><p>Test<u></p></div></body>
+#errors
+(1,61): unexpected-end-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <title>
+|       "U-test"
+|   <body>
+|     <div>
+|       <p>
+|         "Test"
+|         <u>
+
+#data
+<!DOCTYPE html><font><table></font></table></font>
+#errors
+(1,35): unexpected-end-tag-implies-table-voodoo
+(1,35): unexpected-end-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <font>
+|       <table>
+
+#data
+<font><p>hello<b>cruel</font>world
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,29): adoption-agency-1.3
+(1,29): adoption-agency-1.3
+(1,34): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <font>
+|     <p>
+|       <font>
+|         "hello"
+|         <b>
+|           "cruel"
+|       <b>
+|         "world"
+
+#data
+<b>Test</i>Test
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,11): unexpected-end-tag
+(1,15): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <b>
+|       "TestTest"
+
+#data
+<b>A<cite>B<div>C
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,17): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <b>
+|       "A"
+|       <cite>
+|         "B"
+|         <div>
+|           "C"
+
+#data
+<b>A<cite>B<div>C</cite>D
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,24): unexpected-end-tag
+(1,25): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <b>
+|       "A"
+|       <cite>
+|         "B"
+|         <div>
+|           "CD"
+
+#data
+<b>A<cite>B<div>C</b>D
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,21): adoption-agency-1.3
+(1,22): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <b>
+|       "A"
+|       <cite>
+|         "B"
+|     <div>
+|       <b>
+|         "C"
+|       "D"
+
+#data
+
+#errors
+(1,0): expected-doctype-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+
+#data
+<DIV>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,5): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+
+#data
+<DIV> abc
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,9): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       " abc"
+
+#data
+<DIV> abc <B>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,13): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       " abc "
+|       <b>
+
+#data
+<DIV> abc <B> def
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,17): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       " abc "
+|       <b>
+|         " def"
+
+#data
+<DIV> abc <B> def <I>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,21): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       " abc "
+|       <b>
+|         " def "
+|         <i>
+
+#data
+<DIV> abc <B> def <I> ghi
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,25): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       " abc "
+|       <b>
+|         " def "
+|         <i>
+|           " ghi"
+
+#data
+<DIV> abc <B> def <I> ghi <P>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,29): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       " abc "
+|       <b>
+|         " def "
+|         <i>
+|           " ghi "
+|           <p>
+
+#data
+<DIV> abc <B> def <I> ghi <P> jkl
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,33): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       " abc "
+|       <b>
+|         " def "
+|         <i>
+|           " ghi "
+|           <p>
+|             " jkl"
+
+#data
+<DIV> abc <B> def <I> ghi <P> jkl </B>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,38): adoption-agency-1.3
+(1,38): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       " abc "
+|       <b>
+|         " def "
+|         <i>
+|           " ghi "
+|       <i>
+|         <p>
+|           <b>
+|             " jkl "
+
+#data
+<DIV> abc <B> def <I> ghi <P> jkl </B> mno
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,38): adoption-agency-1.3
+(1,42): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       " abc "
+|       <b>
+|         " def "
+|         <i>
+|           " ghi "
+|       <i>
+|         <p>
+|           <b>
+|             " jkl "
+|           " mno"
+
+#data
+<DIV> abc <B> def <I> ghi <P> jkl </B> mno </I>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,38): adoption-agency-1.3
+(1,47): adoption-agency-1.3
+(1,47): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       " abc "
+|       <b>
+|         " def "
+|         <i>
+|           " ghi "
+|       <i>
+|       <p>
+|         <i>
+|           <b>
+|             " jkl "
+|           " mno "
+
+#data
+<DIV> abc <B> def <I> ghi <P> jkl </B> mno </I> pqr
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,38): adoption-agency-1.3
+(1,47): adoption-agency-1.3
+(1,51): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       " abc "
+|       <b>
+|         " def "
+|         <i>
+|           " ghi "
+|       <i>
+|       <p>
+|         <i>
+|           <b>
+|             " jkl "
+|           " mno "
+|         " pqr"
+
+#data
+<DIV> abc <B> def <I> ghi <P> jkl </B> mno </I> pqr </P>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,38): adoption-agency-1.3
+(1,47): adoption-agency-1.3
+(1,56): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       " abc "
+|       <b>
+|         " def "
+|         <i>
+|           " ghi "
+|       <i>
+|       <p>
+|         <i>
+|           <b>
+|             " jkl "
+|           " mno "
+|         " pqr "
+
+#data
+<DIV> abc <B> def <I> ghi <P> jkl </B> mno </I> pqr </P> stu
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,38): adoption-agency-1.3
+(1,47): adoption-agency-1.3
+(1,60): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       " abc "
+|       <b>
+|         " def "
+|         <i>
+|           " ghi "
+|       <i>
+|       <p>
+|         <i>
+|           <b>
+|             " jkl "
+|           " mno "
+|         " pqr "
+|       " stu"
+
+#data
+<test attribute---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------->
+#errors
+(1,1040): expected-doctype-but-got-start-tag
+(1,1040): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <test>
+|       attribute----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------=""
+
+#data
+<a href="blah">aba<table><a href="foo">br<tr><td></td></tr>x</table>aoe
+#errors
+(1,15): expected-doctype-but-got-start-tag
+(1,39): unexpected-start-tag-implies-table-voodoo
+(1,39): unexpected-start-tag-implies-end-tag
+(1,39): unexpected-end-tag
+(1,45): foster-parenting-character-in-table
+(1,45): foster-parenting-character-in-table
+(1,68): foster-parenting-character-in-table
+(1,71): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <a>
+|       href="blah"
+|       "aba"
+|       <a>
+|         href="foo"
+|         "br"
+|       <a>
+|         href="foo"
+|         "x"
+|       <table>
+|         <tbody>
+|           <tr>
+|             <td>
+|     <a>
+|       href="foo"
+|       "aoe"
+
+#data
+<a href="blah">aba<table><tr><td><a href="foo">br</td></tr>x</table>aoe
+#errors
+(1,15): expected-doctype-but-got-start-tag
+(1,54): unexpected-cell-end-tag
+(1,68): unexpected text in table
+(1,71): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <a>
+|       href="blah"
+|       "abax"
+|       <table>
+|         <tbody>
+|           <tr>
+|             <td>
+|               <a>
+|                 href="foo"
+|                 "br"
+|       "aoe"
+
+#data
+<table><a href="blah">aba<tr><td><a href="foo">br</td></tr>x</table>aoe
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,22): unexpected-start-tag-implies-table-voodoo
+(1,29): foster-parenting-character-in-table
+(1,29): foster-parenting-character-in-table
+(1,29): foster-parenting-character-in-table
+(1,54): unexpected-cell-end-tag
+(1,68): foster-parenting-character-in-table
+(1,71): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <a>
+|       href="blah"
+|       "aba"
+|     <a>
+|       href="blah"
+|       "x"
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             <a>
+|               href="foo"
+|               "br"
+|     <a>
+|       href="blah"
+|       "aoe"
+
+#data
+<a href=a>aa<marquee>aa<a href=b>bb</marquee>aa
+#errors
+(1,10): expected-doctype-but-got-start-tag
+(1,45): end-tag-too-early
+(1,47): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <a>
+|       href="a"
+|       "aa"
+|       <marquee>
+|         "aa"
+|         <a>
+|           href="b"
+|           "bb"
+|       "aa"
+
+#data
+<wbr><strike><code></strike><code><strike></code>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,28): adoption-agency-1.3
+(1,49): adoption-agency-1.3
+(1,49): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <wbr>
+|     <strike>
+|       <code>
+|     <code>
+|       <code>
+|         <strike>
+
+#data
+<!DOCTYPE html><spacer>foo
+#errors
+(1,26): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <spacer>
+|       "foo"
+
+#data
+<title><meta></title><link><title><meta></title>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|     <title>
+|       "<meta>"
+|     <link>
+|     <title>
+|       "<meta>"
+|   <body>
+
+#data
+<style><!--</style><meta><script>--><link></script>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|     <style>
+|       "<!--"
+|     <meta>
+|     <script>
+|       "--><link>"
+|   <body>
+
+#data
+<head><meta></head><link>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,25): unexpected-start-tag-out-of-my-head
+#document
+| <html>
+|   <head>
+|     <meta>
+|     <link>
+|   <body>
+
+#data
+<table><tr><tr><td><td><span><th><span>X</table>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,33): unexpected-cell-end-tag
+(1,48): unexpected-cell-end-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|         <tr>
+|           <td>
+|           <td>
+|             <span>
+|           <th>
+|             <span>
+|               "X"
+
+#data
+<body><body><base><link><meta><title><p></title><body><p></body>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,12): unexpected-start-tag
+(1,54): unexpected-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <base>
+|     <link>
+|     <meta>
+|     <title>
+|       "<p>"
+|     <p>
+
+#data
+<textarea><p></textarea>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <textarea>
+|       "<p>"
+
+#data
+<p><image></p>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,10): unexpected-start-tag-treated-as
+#document
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <img>
+
+#data
+<a><table><a></table><p><a><div><a>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,13): unexpected-start-tag-implies-table-voodoo
+(1,13): unexpected-start-tag-implies-end-tag
+(1,13): adoption-agency-1.3
+(1,27): unexpected-start-tag-implies-end-tag
+(1,27): adoption-agency-1.2
+(1,32): unexpected-end-tag
+(1,35): unexpected-start-tag-implies-end-tag
+(1,35): adoption-agency-1.2
+(1,35): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <a>
+|       <a>
+|       <table>
+|     <p>
+|       <a>
+|     <div>
+|       <a>
+
+#data
+<head></p><meta><p>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,10): unexpected-end-tag
+#document
+| <html>
+|   <head>
+|     <meta>
+|   <body>
+|     <p>
+
+#data
+<head></html><meta><p>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,19): expected-eof-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <meta>
+|     <p>
+
+#data
+<b><table><td></b><i></table>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,14): unexpected-cell-in-table-body
+(1,18): unexpected-end-tag
+(1,29): unexpected-cell-end-tag
+(1,29): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <b>
+|       <table>
+|         <tbody>
+|           <tr>
+|             <td>
+|               <i>
+
+#data
+<h1><h2>
+#errors
+(1,4): expected-doctype-but-got-start-tag
+(1,8): unexpected-start-tag
+(1,8): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <h1>
+|     <h2>
+
+#data
+<a><p><a></a></p></a>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,9): unexpected-start-tag-implies-end-tag
+(1,9): adoption-agency-1.3
+(1,21): unexpected-end-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <a>
+|     <p>
+|       <a>
+|       <a>
+
+#data
+<b><button></b></button></b>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,15): adoption-agency-1.3
+(1,28): unexpected-end-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <b>
+|     <button>
+|       <b>
+
+#data
+<p><b><div><marquee></p></b></div>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,11): unexpected-end-tag
+(1,24): unexpected-end-tag
+(1,28): unexpected-end-tag
+(1,34): end-tag-too-early
+(1,34): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <b>
+|     <div>
+|       <b>
+|         <marquee>
+|           <p>
+
+#data
+<script></script></div><title></title><p><p>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,23): unexpected-end-tag
+#document
+| <html>
+|   <head>
+|     <script>
+|     <title>
+|   <body>
+|     <p>
+|     <p>
+
+#data
+<select><b><option><select><option></b></select>
+#errors
+1:1: ERROR: Expected a doctype token
+1:20: ERROR: Start tag 'select' isn't allowed here. Currently open tags: html, body, select, b, option.
+1:36: ERROR: End tag 'b' isn't allowed here. Currently open tags: html, body, b, select, option.
+1:49: ERROR: Premature end of file. Currently open tags: html, body, b.
+#document
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <b>
+|         <option>
+|     <b>
+|       <option>
+
+#data
+<html><head><title></title><body></body></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|     <title>
+|   <body>
+
+#data
+<a><table><td><a><table></table><a></tr><a></table><a>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,14): unexpected-cell-in-table-body
+(1,35): unexpected-start-tag-implies-end-tag
+(1,40): unexpected-cell-end-tag
+(1,43): unexpected-start-tag-implies-table-voodoo
+(1,43): unexpected-start-tag-implies-end-tag
+(1,43): unexpected-end-tag
+(1,54): unexpected-start-tag-implies-end-tag
+(1,54): adoption-agency-1.2
+(1,54): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <a>
+|       <a>
+|       <table>
+|         <tbody>
+|           <tr>
+|             <td>
+|               <a>
+|                 <table>
+|               <a>
+|     <a>
+
+#data
+<ul><li></li><div><li></div><li><li><div><li><address><li><b><em></b><li></ul>
+#errors
+(1,4): expected-doctype-but-got-start-tag
+(1,45): end-tag-too-early
+(1,58): end-tag-too-early
+(1,69): adoption-agency-1.3
+#document
+| <html>
+|   <head>
+|   <body>
+|     <ul>
+|       <li>
+|       <div>
+|         <li>
+|       <li>
+|       <li>
+|         <div>
+|       <li>
+|         <address>
+|       <li>
+|         <b>
+|           <em>
+|       <li>
+
+#data
+<ul><li><ul></li><li>a</li></ul></li></ul>
+#errors
+(1,4): expected-doctype-but-got-start-tag
+(1,17): unexpected-end-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <ul>
+|       <li>
+|         <ul>
+|           <li>
+|             "a"
+
+#data
+<frameset><frame><frameset><frame></frameset><noframes></noframes></frameset>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <frameset>
+|     <frame>
+|     <frameset>
+|       <frame>
+|     <noframes>
+
+#data
+<h1><table><td><h3></table><h3></h1>
+#errors
+(1,4): expected-doctype-but-got-start-tag
+(1,15): unexpected-cell-in-table-body
+(1,27): unexpected-cell-end-tag
+(1,31): unexpected-start-tag
+(1,36): end-tag-too-early
+#document
+| <html>
+|   <head>
+|   <body>
+|     <h1>
+|       <table>
+|         <tbody>
+|           <tr>
+|             <td>
+|               <h3>
+|     <h3>
+
+#data
+<table><colgroup><col><colgroup><col><col><col><colgroup><col><col><thead><tr><td></table>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <colgroup>
+|         <col>
+|       <colgroup>
+|         <col>
+|         <col>
+|         <col>
+|       <colgroup>
+|         <col>
+|         <col>
+|       <thead>
+|         <tr>
+|           <td>
+
+#data
+<table><col><tbody><col><tr><col><td><col></table><col>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,37): unexpected-cell-in-table-body
+(1,55): unexpected-start-tag-ignored
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <colgroup>
+|         <col>
+|       <tbody>
+|       <colgroup>
+|         <col>
+|       <tbody>
+|         <tr>
+|       <colgroup>
+|         <col>
+|       <tbody>
+|         <tr>
+|           <td>
+|       <colgroup>
+|         <col>
+
+#data
+<table><colgroup><tbody><colgroup><tr><colgroup><td><colgroup></table><colgroup>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,52): unexpected-cell-in-table-body
+(1,80): unexpected-start-tag-ignored
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <colgroup>
+|       <tbody>
+|       <colgroup>
+|       <tbody>
+|         <tr>
+|       <colgroup>
+|       <tbody>
+|         <tr>
+|           <td>
+|       <colgroup>
+
+#data
+</strong></b></em></i></u></strike></s></blink></tt></pre></big></small></font></select></h1></h2></h3></h4></h5></h6></body></br></a></img></title></span></style></script></table></th></td></tr></frame></area></link></param></hr></input></col></base></meta></basefont></bgsound></embed></spacer></p></dd></dt></caption></colgroup></tbody></tfoot></thead></address></blockquote></center></dir></div></dl></fieldset></listing></menu></ol></ul></li></nobr></wbr></form></button></marquee></object></html></frameset></head></iframe></image></isindex></noembed></noframes></noscript></optgroup></option></plaintext></textarea>
+#errors
+(1,9): expected-doctype-but-got-end-tag
+(1,9): unexpected-end-tag-before-html
+(1,13): unexpected-end-tag-before-html
+(1,18): unexpected-end-tag-before-html
+(1,22): unexpected-end-tag-before-html
+(1,26): unexpected-end-tag-before-html
+(1,35): unexpected-end-tag-before-html
+(1,39): unexpected-end-tag-before-html
+(1,47): unexpected-end-tag-before-html
+(1,52): unexpected-end-tag-before-html
+(1,58): unexpected-end-tag-before-html
+(1,64): unexpected-end-tag-before-html
+(1,72): unexpected-end-tag-before-html
+(1,79): unexpected-end-tag-before-html
+(1,88): unexpected-end-tag-before-html
+(1,93): unexpected-end-tag-before-html
+(1,98): unexpected-end-tag-before-html
+(1,103): unexpected-end-tag-before-html
+(1,108): unexpected-end-tag-before-html
+(1,113): unexpected-end-tag-before-html
+(1,118): unexpected-end-tag-before-html
+(1,130): unexpected-end-tag-after-body
+(1,130): unexpected-end-tag-treated-as
+(1,134): unexpected-end-tag
+(1,140): unexpected-end-tag
+(1,148): unexpected-end-tag
+(1,155): unexpected-end-tag
+(1,163): unexpected-end-tag
+(1,172): unexpected-end-tag
+(1,180): unexpected-end-tag
+(1,185): unexpected-end-tag
+(1,190): unexpected-end-tag
+(1,195): unexpected-end-tag
+(1,203): unexpected-end-tag
+(1,210): unexpected-end-tag
+(1,217): unexpected-end-tag
+(1,225): unexpected-end-tag
+(1,230): unexpected-end-tag
+(1,238): unexpected-end-tag
+(1,244): unexpected-end-tag
+(1,251): unexpected-end-tag
+(1,258): unexpected-end-tag
+(1,269): unexpected-end-tag
+(1,279): unexpected-end-tag
+(1,287): unexpected-end-tag
+(1,296): unexpected-end-tag
+(1,300): unexpected-end-tag
+(1,305): unexpected-end-tag
+(1,310): unexpected-end-tag
+(1,320): unexpected-end-tag
+(1,331): unexpected-end-tag
+(1,339): unexpected-end-tag
+(1,347): unexpected-end-tag
+(1,355): unexpected-end-tag
+(1,365): end-tag-too-early
+(1,378): end-tag-too-early
+(1,387): end-tag-too-early
+(1,393): end-tag-too-early
+(1,399): end-tag-too-early
+(1,404): end-tag-too-early
+(1,415): end-tag-too-early
+(1,425): end-tag-too-early
+(1,432): end-tag-too-early
+(1,437): end-tag-too-early
+(1,442): end-tag-too-early
+(1,447): unexpected-end-tag
+(1,454): unexpected-end-tag
+(1,460): unexpected-end-tag
+(1,467): unexpected-end-tag
+(1,476): end-tag-too-early
+(1,486): end-tag-too-early
+(1,495): end-tag-too-early
+(1,513): expected-eof-but-got-end-tag
+(1,513): unexpected-end-tag
+(1,520): unexpected-end-tag
+(1,529): unexpected-end-tag
+(1,537): unexpected-end-tag
+(1,547): unexpected-end-tag
+(1,557): unexpected-end-tag
+(1,568): unexpected-end-tag
+(1,579): unexpected-end-tag
+(1,590): unexpected-end-tag
+(1,599): unexpected-end-tag
+(1,611): unexpected-end-tag
+(1,622): unexpected-end-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <br>
+|     <p>
+
+#data
+<table><tr></strong></b></em></i></u></strike></s></blink></tt></pre></big></small></font></select></h1></h2></h3></h4></h5></h6></body></br></a></img></title></span></style></script></table></th></td></tr></frame></area></link></param></hr></input></col></base></meta></basefont></bgsound></embed></spacer></p></dd></dt></caption></colgroup></tbody></tfoot></thead></address></blockquote></center></dir></div></dl></fieldset></listing></menu></ol></ul></li></nobr></wbr></form></button></marquee></object></html></frameset></head></iframe></image></isindex></noembed></noframes></noscript></optgroup></option></plaintext></textarea>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,20): unexpected-end-tag-implies-table-voodoo
+(1,20): unexpected-end-tag
+(1,24): unexpected-end-tag-implies-table-voodoo
+(1,24): unexpected-end-tag
+(1,29): unexpected-end-tag-implies-table-voodoo
+(1,29): unexpected-end-tag
+(1,33): unexpected-end-tag-implies-table-voodoo
+(1,33): unexpected-end-tag
+(1,37): unexpected-end-tag-implies-table-voodoo
+(1,37): unexpected-end-tag
+(1,46): unexpected-end-tag-implies-table-voodoo
+(1,46): unexpected-end-tag
+(1,50): unexpected-end-tag-implies-table-voodoo
+(1,50): unexpected-end-tag
+(1,58): unexpected-end-tag-implies-table-voodoo
+(1,58): unexpected-end-tag
+(1,63): unexpected-end-tag-implies-table-voodoo
+(1,63): unexpected-end-tag
+(1,69): unexpected-end-tag-implies-table-voodoo
+(1,69): end-tag-too-early
+(1,75): unexpected-end-tag-implies-table-voodoo
+(1,75): unexpected-end-tag
+(1,83): unexpected-end-tag-implies-table-voodoo
+(1,83): unexpected-end-tag
+(1,90): unexpected-end-tag-implies-table-voodoo
+(1,90): unexpected-end-tag
+(1,99): unexpected-end-tag-implies-table-voodoo
+(1,99): unexpected-end-tag
+(1,104): unexpected-end-tag-implies-table-voodoo
+(1,104): end-tag-too-early
+(1,109): unexpected-end-tag-implies-table-voodoo
+(1,109): end-tag-too-early
+(1,114): unexpected-end-tag-implies-table-voodoo
+(1,114): end-tag-too-early
+(1,119): unexpected-end-tag-implies-table-voodoo
+(1,119): end-tag-too-early
+(1,124): unexpected-end-tag-implies-table-voodoo
+(1,124): end-tag-too-early
+(1,129): unexpected-end-tag-implies-table-voodoo
+(1,129): end-tag-too-early
+(1,136): unexpected-end-tag-in-table-row
+(1,141): unexpected-end-tag-implies-table-voodoo
+(1,141): unexpected-end-tag-treated-as
+(1,145): unexpected-end-tag-implies-table-voodoo
+(1,145): unexpected-end-tag
+(1,151): unexpected-end-tag-implies-table-voodoo
+(1,151): unexpected-end-tag
+(1,159): unexpected-end-tag-implies-table-voodoo
+(1,159): unexpected-end-tag
+(1,166): unexpected-end-tag-implies-table-voodoo
+(1,166): unexpected-end-tag
+(1,174): unexpected-end-tag-implies-table-voodoo
+(1,174): unexpected-end-tag
+(1,183): unexpected-end-tag-implies-table-voodoo
+(1,183): unexpected-end-tag
+(1,196): unexpected-end-tag
+(1,201): unexpected-end-tag
+(1,206): unexpected-end-tag
+(1,214): unexpected-end-tag
+(1,221): unexpected-end-tag
+(1,228): unexpected-end-tag
+(1,236): unexpected-end-tag
+(1,241): unexpected-end-tag
+(1,249): unexpected-end-tag
+(1,255): unexpected-end-tag
+(1,262): unexpected-end-tag
+(1,269): unexpected-end-tag
+(1,280): unexpected-end-tag
+(1,290): unexpected-end-tag
+(1,298): unexpected-end-tag
+(1,307): unexpected-end-tag
+(1,311): unexpected-end-tag
+(1,316): unexpected-end-tag
+(1,321): unexpected-end-tag
+(1,331): unexpected-end-tag
+(1,342): unexpected-end-tag
+(1,350): unexpected-end-tag
+(1,358): unexpected-end-tag
+(1,366): unexpected-end-tag
+(1,376): end-tag-too-early
+(1,389): end-tag-too-early
+(1,398): end-tag-too-early
+(1,404): end-tag-too-early
+(1,410): end-tag-too-early
+(1,415): end-tag-too-early
+(1,426): end-tag-too-early
+(1,436): end-tag-too-early
+(1,443): end-tag-too-early
+(1,448): end-tag-too-early
+(1,453): end-tag-too-early
+(1,458): unexpected-end-tag
+(1,465): unexpected-end-tag
+(1,471): unexpected-end-tag
+(1,478): unexpected-end-tag
+(1,487): end-tag-too-early
+(1,497): end-tag-too-early
+(1,506): end-tag-too-early
+(1,524): expected-eof-but-got-end-tag
+(1,524): unexpected-end-tag
+(1,531): unexpected-end-tag
+(1,540): unexpected-end-tag
+(1,548): unexpected-end-tag
+(1,558): unexpected-end-tag
+(1,568): unexpected-end-tag
+(1,579): unexpected-end-tag
+(1,590): unexpected-end-tag
+(1,601): unexpected-end-tag
+(1,610): unexpected-end-tag
+(1,622): unexpected-end-tag
+(1,633): unexpected-end-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <br>
+|     <table>
+|       <tbody>
+|         <tr>
+|     <p>
+
+#data
+<frameset>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+(1,10): eof-in-frameset
+#document
+| <html>
+|   <head>
+|   <frameset>
diff --git a/tests/data/tree-construction/tests10.dat b/tests/data/tree-construction/tests10.dat
new file mode 100644
index 00000000..3b311e4e
--- /dev/null
+++ b/tests/data/tree-construction/tests10.dat
@@ -0,0 +1,853 @@
+#data
+<!DOCTYPE html><svg></svg>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+
+#data
+<!DOCTYPE html><svg></svg><![CDATA[a]]>
+#errors
+(1,28) expected-dashes-or-doctype
+#new-errors
+(1:35) cdata-in-html-content
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|     <!-- [CDATA[a]] -->
+
+#data
+<!DOCTYPE html><body><svg></svg>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+
+#data
+<!DOCTYPE html><body><select><svg></svg></select>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <svg svg>
+
+#data
+<!DOCTYPE html><body><select><option><svg></svg></option></select>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <option>
+|         <svg svg>
+
+#data
+<!DOCTYPE html><body><table><svg></svg></table>
+#errors
+(1,33) foster-parenting-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|     <table>
+
+#data
+<!DOCTYPE html><body><table><svg><g>foo</g></svg></table>
+#errors
+(1,33) foster-parenting-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       <svg g>
+|         "foo"
+|     <table>
+
+#data
+<!DOCTYPE html><body><table><svg><g>foo</g><g>bar</g></svg></table>
+#errors
+(1,33) foster-parenting-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       <svg g>
+|         "foo"
+|       <svg g>
+|         "bar"
+|     <table>
+
+#data
+<!DOCTYPE html><body><table><tbody><svg><g>foo</g><g>bar</g></svg></tbody></table>
+#errors
+(1,40) foster-parenting-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       <svg g>
+|         "foo"
+|       <svg g>
+|         "bar"
+|     <table>
+|       <tbody>
+
+#data
+<!DOCTYPE html><body><table><tbody><tr><svg><g>foo</g><g>bar</g></svg></tr></tbody></table>
+#errors
+(1,44) foster-parenting-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       <svg g>
+|         "foo"
+|       <svg g>
+|         "bar"
+|     <table>
+|       <tbody>
+|         <tr>
+
+#data
+<!DOCTYPE html><body><table><tbody><tr><td><svg><g>foo</g><g>bar</g></svg></td></tr></tbody></table>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             <svg svg>
+|               <svg g>
+|                 "foo"
+|               <svg g>
+|                 "bar"
+
+#data
+<!DOCTYPE html><body><table><tbody><tr><td><svg><g>foo</g><g>bar</g></svg><p>baz</td></tr></tbody></table>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             <svg svg>
+|               <svg g>
+|                 "foo"
+|               <svg g>
+|                 "bar"
+|             <p>
+|               "baz"
+
+#data
+<!DOCTYPE html><body><table><caption><svg><g>foo</g><g>bar</g></svg><p>baz</caption></table>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <caption>
+|         <svg svg>
+|           <svg g>
+|             "foo"
+|           <svg g>
+|             "bar"
+|         <p>
+|           "baz"
+
+#data
+<!DOCTYPE html><body><table><caption><svg><g>foo</g><g>bar</g><p>baz</table><p>quux
+#errors
+(1,65) unexpected-html-element-in-foreign-content
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <caption>
+|         <svg svg>
+|           <svg g>
+|             "foo"
+|           <svg g>
+|             "bar"
+|         <p>
+|           "baz"
+|     <p>
+|       "quux"
+
+#data
+<!DOCTYPE html><body><table><caption><svg><g>foo</g><g>bar</g>baz</table><p>quux
+#errors
+(1,73) unexpected-end-tag
+(1,73) expected-one-end-tag-but-got-another
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <caption>
+|         <svg svg>
+|           <svg g>
+|             "foo"
+|           <svg g>
+|             "bar"
+|           "baz"
+|     <p>
+|       "quux"
+
+#data
+<!DOCTYPE html><body><table><colgroup><svg><g>foo</g><g>bar</g><p>baz</table><p>quux
+#errors
+(1,43) foster-parenting-start-tag svg
+(1,66) unexpected HTML-like start tag token in foreign content
+(1,66) foster-parenting-start-tag
+(1,67) foster-parenting-character
+(1,68) foster-parenting-character
+(1,69) foster-parenting-character
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       <svg g>
+|         "foo"
+|       <svg g>
+|         "bar"
+|     <p>
+|       "baz"
+|     <table>
+|       <colgroup>
+|     <p>
+|       "quux"
+
+#data
+<!DOCTYPE html><body><table><tr><td><select><svg><g>foo</g><g>bar</g><p>baz</table><p>quux
+#errors
+1:70: ERROR: Start tag 'p' isn't allowed here. Currently open tags: html, body, table, tbody, tr, td, select, svg.
+1:76: ERROR: End tag 'table' isn't allowed here. Currently open tags: html, body, table, tbody, tr, td, select.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             <select>
+|               <svg svg>
+|                 <svg g>
+|                   "foo"
+|                 <svg g>
+|                   "bar"
+|               <p>
+|                 "baz"
+|     <p>
+|       "quux"
+
+#data
+<!DOCTYPE html><body><table><select><svg><g>foo</g><g>bar</g><p>baz</table><p>quux
+#errors
+1:29: ERROR: Start tag 'select' isn't allowed here. Currently open tags: html, body, table.
+1:37: ERROR: Start tag 'svg' isn't allowed here. Currently open tags: html, body, table, select.
+1:62: ERROR: Start tag 'p' isn't allowed here. Currently open tags: html, body, table, select, svg.
+1:62: ERROR: Start tag 'p' isn't allowed here. Currently open tags: html, body, table, select.
+1:65: ERROR: Character tokens aren't legal here
+1:66: ERROR: Character tokens aren't legal here
+1:67: ERROR: Character tokens aren't legal here
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <svg svg>
+|         <svg g>
+|           "foo"
+|         <svg g>
+|           "bar"
+|       <p>
+|         "baz"
+|     <table>
+|     <p>
+|       "quux"
+
+#data
+<!DOCTYPE html><body></body></html><svg><g>foo</g><g>bar</g><p>baz
+#errors
+(1,40) expected-eof-but-got-start-tag
+(1,63) unexpected-html-element-in-foreign-content
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       <svg g>
+|         "foo"
+|       <svg g>
+|         "bar"
+|     <p>
+|       "baz"
+
+#data
+<!DOCTYPE html><body></body><svg><g>foo</g><g>bar</g><p>baz
+#errors
+(1,33) unexpected-start-tag-after-body
+(1,56) unexpected-html-element-in-foreign-content
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       <svg g>
+|         "foo"
+|       <svg g>
+|         "bar"
+|     <p>
+|       "baz"
+
+#data
+<!DOCTYPE html><frameset><svg><g></g><g></g><p><span>
+#errors
+(1,30) unexpected-start-tag-in-frameset
+(1,33) unexpected-start-tag-in-frameset
+(1,37) unexpected-end-tag-in-frameset
+(1,40) unexpected-start-tag-in-frameset
+(1,44) unexpected-end-tag-in-frameset
+(1,47) unexpected-start-tag-in-frameset
+(1,53) unexpected-start-tag-in-frameset
+(1,53) eof-in-frameset
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <frameset>
+
+#data
+<!DOCTYPE html><frameset></frameset><svg><g></g><g></g><p><span>
+#errors
+(1,41) unexpected-start-tag-after-frameset
+(1,44) unexpected-start-tag-after-frameset
+(1,48) unexpected-end-tag-after-frameset
+(1,51) unexpected-start-tag-after-frameset
+(1,55) unexpected-end-tag-after-frameset
+(1,58) unexpected-start-tag-after-frameset
+(1,64) unexpected-start-tag-after-frameset
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <frameset>
+
+#data
+<!DOCTYPE html><body xlink:href=foo><svg xlink:href=foo></svg>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     xlink:href="foo"
+|     <svg svg>
+|       xlink href="foo"
+
+#data
+<!DOCTYPE html><body xlink:href=foo xml:lang=en><svg><g xml:lang=en xlink:href=foo></g></svg>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     xlink:href="foo"
+|     xml:lang="en"
+|     <svg svg>
+|       <svg g>
+|         xlink href="foo"
+|         xml lang="en"
+
+#data
+<!DOCTYPE html><body xlink:href=foo xml:lang=en><svg><g xml:lang=en xlink:href=foo /></svg>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     xlink:href="foo"
+|     xml:lang="en"
+|     <svg svg>
+|       <svg g>
+|         xlink href="foo"
+|         xml lang="en"
+
+#data
+<!DOCTYPE html><body xlink:href=foo xml:lang=en><svg><g xml:lang=en xlink:href=foo />bar</svg>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     xlink:href="foo"
+|     xml:lang="en"
+|     <svg svg>
+|       <svg g>
+|         xlink href="foo"
+|         xml lang="en"
+|       "bar"
+
+#data
+<svg></path>
+#errors
+(1,5) expected-doctype-but-got-start-tag
+(1,12) unexpected-end-tag
+(1,12) unexpected-end-tag
+(1,12) expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+
+#data
+<div><svg></div>a
+#errors
+(1,5) expected-doctype-but-got-start-tag
+(1,16) unexpected-end-tag
+(1,16) end-tag-too-early
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       <svg svg>
+|     "a"
+
+#data
+<div><svg><path></div>a
+#errors
+(1,5) expected-doctype-but-got-start-tag
+(1,22) unexpected-end-tag
+(1,22) end-tag-too-early
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       <svg svg>
+|         <svg path>
+|     "a"
+
+#data
+<div><svg><path></svg><path>
+#errors
+(1,5) expected-doctype-but-got-start-tag
+(1,22) unexpected-end-tag
+(1,28) expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       <svg svg>
+|         <svg path>
+|       <path>
+
+#data
+<div><svg><path><foreignObject><math></div>a
+#errors
+(1,5) expected-doctype-but-got-start-tag
+(1,43) unexpected-end-tag
+(1,43) end-tag-too-early
+(1,44) expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       <svg svg>
+|         <svg path>
+|           <svg foreignObject>
+|             <math math>
+|               "a"
+
+#data
+<div><svg><path><foreignObject><p></div>a
+#errors
+(1,5) expected-doctype-but-got-start-tag
+(1,40) end-tag-too-early
+(1,41) expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       <svg svg>
+|         <svg path>
+|           <svg foreignObject>
+|             <p>
+|               "a"
+
+#data
+<!DOCTYPE html><svg><desc><div><svg><ul>a
+#errors
+(1,40) unexpected-html-element-in-foreign-content
+(1,41) expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       <svg desc>
+|         <div>
+|           <svg svg>
+|           <ul>
+|             "a"
+
+#data
+<!DOCTYPE html><svg><desc><svg><ul>a
+#errors
+(1,35) unexpected-html-element-in-foreign-content
+(1,36) expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       <svg desc>
+|         <svg svg>
+|         <ul>
+|           "a"
+
+#data
+<!DOCTYPE html><p><svg><desc><p>
+#errors
+(1,32) expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <svg svg>
+|         <svg desc>
+|           <p>
+
+#data
+<!DOCTYPE html><p><svg><title><p>
+#errors
+(1,33) expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <svg svg>
+|         <svg title>
+|           <p>
+
+#data
+<div><svg><path><foreignObject><p></foreignObject><p>
+#errors
+(1,5) expected-doctype-but-got-start-tag
+(1,50) unexpected-end-tag
+(1,53) expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       <svg svg>
+|         <svg path>
+|           <svg foreignObject>
+|             <p>
+|             <p>
+
+#data
+<math><mi><div><object><div><span></span></div></object></div></mi><mi>
+#errors
+(1,6) expected-doctype-but-got-start-tag
+(1,71) expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math mi>
+|         <div>
+|           <object>
+|             <div>
+|               <span>
+|       <math mi>
+
+#data
+<math><mi><svg><foreignObject><div><div></div></div></foreignObject></svg></mi><mi>
+#errors
+(1,6) expected-doctype-but-got-start-tag
+(1,83) expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math mi>
+|         <svg svg>
+|           <svg foreignObject>
+|             <div>
+|               <div>
+|       <math mi>
+
+#data
+<svg><script></script><path>
+#errors
+(1,5) expected-doctype-but-got-start-tag
+(1,28) expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       <svg script>
+|       <svg path>
+
+#data
+<table><svg></svg><tr>
+#errors
+(1,7) expected-doctype-but-got-start-tag
+(1,12) unexpected-start-tag-implies-table-voodoo
+(1,22) eof-in-table
+#document
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|     <table>
+|       <tbody>
+|         <tr>
+
+#data
+<math><mi><mglyph>
+#errors
+(1,6) expected-doctype-but-got-start-tag
+(1,18) expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math mi>
+|         <math mglyph>
+
+#data
+<math><mi><malignmark>
+#errors
+(1,6) expected-doctype-but-got-start-tag
+(1,22) expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math mi>
+|         <math malignmark>
+
+#data
+<math><mo><mglyph>
+#errors
+(1,6) expected-doctype-but-got-start-tag
+(1,18) expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math mo>
+|         <math mglyph>
+
+#data
+<math><mo><malignmark>
+#errors
+(1,6) expected-doctype-but-got-start-tag
+(1,22) expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math mo>
+|         <math malignmark>
+
+#data
+<math><mn><mglyph>
+#errors
+(1,6) expected-doctype-but-got-start-tag
+(1,18) expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math mn>
+|         <math mglyph>
+
+#data
+<math><mn><malignmark>
+#errors
+(1,6) expected-doctype-but-got-start-tag
+(1,22) expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math mn>
+|         <math malignmark>
+
+#data
+<math><ms><mglyph>
+#errors
+(1,6) expected-doctype-but-got-start-tag
+(1,18) expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math ms>
+|         <math mglyph>
+
+#data
+<math><ms><malignmark>
+#errors
+(1,6) expected-doctype-but-got-start-tag
+(1,22) expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math ms>
+|         <math malignmark>
+
+#data
+<math><mtext><mglyph>
+#errors
+(1,6) expected-doctype-but-got-start-tag
+(1,21) expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math mtext>
+|         <math mglyph>
+
+#data
+<math><mtext><malignmark>
+#errors
+(1,6) expected-doctype-but-got-start-tag
+(1,25) expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math mtext>
+|         <math malignmark>
+
+#data
+<math><annotation-xml><svg></svg></annotation-xml><mi>
+#errors
+(1,6) expected-doctype-but-got-start-tag
+(1,54) expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math annotation-xml>
+|         <svg svg>
+|       <math mi>
+
+#data
+<math><annotation-xml><svg><foreignObject><div><math><mi></mi></math><span></span></div></foreignObject><path></path></svg></annotation-xml><mi>
+#errors
+(1,6) expected-doctype-but-got-start-tag
+(1,144) expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math annotation-xml>
+|         <svg svg>
+|           <svg foreignObject>
+|             <div>
+|               <math math>
+|                 <math mi>
+|               <span>
+|           <svg path>
+|       <math mi>
+
+#data
+<math><annotation-xml><svg><foreignObject><math><mi><svg></svg></mi><mo></mo></math><span></span></foreignObject><path></path></svg></annotation-xml><mi>
+#errors
+(1,6) expected-doctype-but-got-start-tag
+(1,153) expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math annotation-xml>
+|         <svg svg>
+|           <svg foreignObject>
+|             <math math>
+|               <math mi>
+|                 <svg svg>
+|               <math mo>
+|             <span>
+|           <svg path>
+|       <math mi>
diff --git a/tests/data/tree-construction/tests11.dat b/tests/data/tree-construction/tests11.dat
new file mode 100644
index 00000000..b9901e79
--- /dev/null
+++ b/tests/data/tree-construction/tests11.dat
@@ -0,0 +1,523 @@
+#data
+<!DOCTYPE html><body><svg attributeName='' attributeType='' baseFrequency='' baseProfile='' calcMode='' clipPathUnits='' diffuseConstant='' edgeMode='' filterUnits='' glyphRef='' gradientTransform='' gradientUnits='' kernelMatrix='' kernelUnitLength='' keyPoints='' keySplines='' keyTimes='' lengthAdjust='' limitingConeAngle='' markerHeight='' markerUnits='' markerWidth='' maskContentUnits='' maskUnits='' numOctaves='' pathLength='' patternContentUnits='' patternTransform='' patternUnits='' pointsAtX='' pointsAtY='' pointsAtZ='' preserveAlpha='' preserveAspectRatio='' primitiveUnits='' refX='' refY='' repeatCount='' repeatDur='' requiredExtensions='' requiredFeatures='' specularConstant='' specularExponent='' spreadMethod='' startOffset='' stdDeviation='' stitchTiles='' surfaceScale='' systemLanguage='' tableValues='' targetX='' targetY='' textLength='' viewBox='' viewTarget='' xChannelSelector='' yChannelSelector='' zoomAndPan=''></svg>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       attributeName=""
+|       attributeType=""
+|       baseFrequency=""
+|       baseProfile=""
+|       calcMode=""
+|       clipPathUnits=""
+|       diffuseConstant=""
+|       edgeMode=""
+|       filterUnits=""
+|       glyphRef=""
+|       gradientTransform=""
+|       gradientUnits=""
+|       kernelMatrix=""
+|       kernelUnitLength=""
+|       keyPoints=""
+|       keySplines=""
+|       keyTimes=""
+|       lengthAdjust=""
+|       limitingConeAngle=""
+|       markerHeight=""
+|       markerUnits=""
+|       markerWidth=""
+|       maskContentUnits=""
+|       maskUnits=""
+|       numOctaves=""
+|       pathLength=""
+|       patternContentUnits=""
+|       patternTransform=""
+|       patternUnits=""
+|       pointsAtX=""
+|       pointsAtY=""
+|       pointsAtZ=""
+|       preserveAlpha=""
+|       preserveAspectRatio=""
+|       primitiveUnits=""
+|       refX=""
+|       refY=""
+|       repeatCount=""
+|       repeatDur=""
+|       requiredExtensions=""
+|       requiredFeatures=""
+|       specularConstant=""
+|       specularExponent=""
+|       spreadMethod=""
+|       startOffset=""
+|       stdDeviation=""
+|       stitchTiles=""
+|       surfaceScale=""
+|       systemLanguage=""
+|       tableValues=""
+|       targetX=""
+|       targetY=""
+|       textLength=""
+|       viewBox=""
+|       viewTarget=""
+|       xChannelSelector=""
+|       yChannelSelector=""
+|       zoomAndPan=""
+
+#data
+<!DOCTYPE html><BODY><SVG ATTRIBUTENAME='' ATTRIBUTETYPE='' BASEFREQUENCY='' BASEPROFILE='' CALCMODE='' CLIPPATHUNITS='' DIFFUSECONSTANT='' EDGEMODE='' FILTERUNITS='' GLYPHREF='' GRADIENTTRANSFORM='' GRADIENTUNITS='' KERNELMATRIX='' KERNELUNITLENGTH='' KEYPOINTS='' KEYSPLINES='' KEYTIMES='' LENGTHADJUST='' LIMITINGCONEANGLE='' MARKERHEIGHT='' MARKERUNITS='' MARKERWIDTH='' MASKCONTENTUNITS='' MASKUNITS='' NUMOCTAVES='' PATHLENGTH='' PATTERNCONTENTUNITS='' PATTERNTRANSFORM='' PATTERNUNITS='' POINTSATX='' POINTSATY='' POINTSATZ='' PRESERVEALPHA='' PRESERVEASPECTRATIO='' PRIMITIVEUNITS='' REFX='' REFY='' REPEATCOUNT='' REPEATDUR='' REQUIREDEXTENSIONS='' REQUIREDFEATURES='' SPECULARCONSTANT='' SPECULAREXPONENT='' SPREADMETHOD='' STARTOFFSET='' STDDEVIATION='' STITCHTILES='' SURFACESCALE='' SYSTEMLANGUAGE='' TABLEVALUES='' TARGETX='' TARGETY='' TEXTLENGTH='' VIEWBOX='' VIEWTARGET='' XCHANNELSELECTOR='' YCHANNELSELECTOR='' ZOOMANDPAN=''></SVG>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       attributeName=""
+|       attributeType=""
+|       baseFrequency=""
+|       baseProfile=""
+|       calcMode=""
+|       clipPathUnits=""
+|       diffuseConstant=""
+|       edgeMode=""
+|       filterUnits=""
+|       glyphRef=""
+|       gradientTransform=""
+|       gradientUnits=""
+|       kernelMatrix=""
+|       kernelUnitLength=""
+|       keyPoints=""
+|       keySplines=""
+|       keyTimes=""
+|       lengthAdjust=""
+|       limitingConeAngle=""
+|       markerHeight=""
+|       markerUnits=""
+|       markerWidth=""
+|       maskContentUnits=""
+|       maskUnits=""
+|       numOctaves=""
+|       pathLength=""
+|       patternContentUnits=""
+|       patternTransform=""
+|       patternUnits=""
+|       pointsAtX=""
+|       pointsAtY=""
+|       pointsAtZ=""
+|       preserveAlpha=""
+|       preserveAspectRatio=""
+|       primitiveUnits=""
+|       refX=""
+|       refY=""
+|       repeatCount=""
+|       repeatDur=""
+|       requiredExtensions=""
+|       requiredFeatures=""
+|       specularConstant=""
+|       specularExponent=""
+|       spreadMethod=""
+|       startOffset=""
+|       stdDeviation=""
+|       stitchTiles=""
+|       surfaceScale=""
+|       systemLanguage=""
+|       tableValues=""
+|       targetX=""
+|       targetY=""
+|       textLength=""
+|       viewBox=""
+|       viewTarget=""
+|       xChannelSelector=""
+|       yChannelSelector=""
+|       zoomAndPan=""
+
+#data
+<!DOCTYPE html><body><svg attributename='' attributetype='' basefrequency='' baseprofile='' calcmode='' clippathunits='' diffuseconstant='' edgemode='' filterunits='' filterres='' glyphref='' gradienttransform='' gradientunits='' kernelmatrix='' kernelunitlength='' keypoints='' keysplines='' keytimes='' lengthadjust='' limitingconeangle='' markerheight='' markerunits='' markerwidth='' maskcontentunits='' maskunits='' numoctaves='' pathlength='' patterncontentunits='' patterntransform='' patternunits='' pointsatx='' pointsaty='' pointsatz='' preservealpha='' preserveaspectratio='' primitiveunits='' refx='' refy='' repeatcount='' repeatdur='' requiredextensions='' requiredfeatures='' specularconstant='' specularexponent='' spreadmethod='' startoffset='' stddeviation='' stitchtiles='' surfacescale='' systemlanguage='' tablevalues='' targetx='' targety='' textlength='' viewbox='' viewtarget='' xchannelselector='' ychannelselector='' zoomandpan=''></svg>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       attributeName=""
+|       attributeType=""
+|       baseFrequency=""
+|       baseProfile=""
+|       calcMode=""
+|       clipPathUnits=""
+|       diffuseConstant=""
+|       edgeMode=""
+|       filterUnits=""
+|       filterres=""
+|       glyphRef=""
+|       gradientTransform=""
+|       gradientUnits=""
+|       kernelMatrix=""
+|       kernelUnitLength=""
+|       keyPoints=""
+|       keySplines=""
+|       keyTimes=""
+|       lengthAdjust=""
+|       limitingConeAngle=""
+|       markerHeight=""
+|       markerUnits=""
+|       markerWidth=""
+|       maskContentUnits=""
+|       maskUnits=""
+|       numOctaves=""
+|       pathLength=""
+|       patternContentUnits=""
+|       patternTransform=""
+|       patternUnits=""
+|       pointsAtX=""
+|       pointsAtY=""
+|       pointsAtZ=""
+|       preserveAlpha=""
+|       preserveAspectRatio=""
+|       primitiveUnits=""
+|       refX=""
+|       refY=""
+|       repeatCount=""
+|       repeatDur=""
+|       requiredExtensions=""
+|       requiredFeatures=""
+|       specularConstant=""
+|       specularExponent=""
+|       spreadMethod=""
+|       startOffset=""
+|       stdDeviation=""
+|       stitchTiles=""
+|       surfaceScale=""
+|       systemLanguage=""
+|       tableValues=""
+|       targetX=""
+|       targetY=""
+|       textLength=""
+|       viewBox=""
+|       viewTarget=""
+|       xChannelSelector=""
+|       yChannelSelector=""
+|       zoomAndPan=""
+
+#data
+<!DOCTYPE html><body><math attributeName='' attributeType='' baseFrequency='' baseProfile='' calcMode='' clipPathUnits='' diffuseConstant='' edgeMode='' filterUnits='' glyphRef='' gradientTransform='' gradientUnits='' kernelMatrix='' kernelUnitLength='' keyPoints='' keySplines='' keyTimes='' lengthAdjust='' limitingConeAngle='' markerHeight='' markerUnits='' markerWidth='' maskContentUnits='' maskUnits='' numOctaves='' pathLength='' patternContentUnits='' patternTransform='' patternUnits='' pointsAtX='' pointsAtY='' pointsAtZ='' preserveAlpha='' preserveAspectRatio='' primitiveUnits='' refX='' refY='' repeatCount='' repeatDur='' requiredExtensions='' requiredFeatures='' specularConstant='' specularExponent='' spreadMethod='' startOffset='' stdDeviation='' stitchTiles='' surfaceScale='' systemLanguage='' tableValues='' targetX='' targetY='' textLength='' viewBox='' viewTarget='' xChannelSelector='' yChannelSelector='' zoomAndPan=''></math>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       attributename=""
+|       attributetype=""
+|       basefrequency=""
+|       baseprofile=""
+|       calcmode=""
+|       clippathunits=""
+|       diffuseconstant=""
+|       edgemode=""
+|       filterunits=""
+|       glyphref=""
+|       gradienttransform=""
+|       gradientunits=""
+|       kernelmatrix=""
+|       kernelunitlength=""
+|       keypoints=""
+|       keysplines=""
+|       keytimes=""
+|       lengthadjust=""
+|       limitingconeangle=""
+|       markerheight=""
+|       markerunits=""
+|       markerwidth=""
+|       maskcontentunits=""
+|       maskunits=""
+|       numoctaves=""
+|       pathlength=""
+|       patterncontentunits=""
+|       patterntransform=""
+|       patternunits=""
+|       pointsatx=""
+|       pointsaty=""
+|       pointsatz=""
+|       preservealpha=""
+|       preserveaspectratio=""
+|       primitiveunits=""
+|       refx=""
+|       refy=""
+|       repeatcount=""
+|       repeatdur=""
+|       requiredextensions=""
+|       requiredfeatures=""
+|       specularconstant=""
+|       specularexponent=""
+|       spreadmethod=""
+|       startoffset=""
+|       stddeviation=""
+|       stitchtiles=""
+|       surfacescale=""
+|       systemlanguage=""
+|       tablevalues=""
+|       targetx=""
+|       targety=""
+|       textlength=""
+|       viewbox=""
+|       viewtarget=""
+|       xchannelselector=""
+|       ychannelselector=""
+|       zoomandpan=""
+
+#data
+<!DOCTYPE html><body><svg contentScriptType='' contentStyleType='' externalResourcesRequired='' filterRes=''></svg>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       contentscripttype=""
+|       contentstyletype=""
+|       externalresourcesrequired=""
+|       filterres=""
+
+#data
+<!DOCTYPE html><body><svg CONTENTSCRIPTTYPE='' CONTENTSTYLETYPE='' EXTERNALRESOURCESREQUIRED='' FILTERRES=''></svg>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       contentscripttype=""
+|       contentstyletype=""
+|       externalresourcesrequired=""
+|       filterres=""
+
+#data
+<!DOCTYPE html><body><svg contentscripttype='' contentstyletype='' externalresourcesrequired='' filterres=''></svg>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       contentscripttype=""
+|       contentstyletype=""
+|       externalresourcesrequired=""
+|       filterres=""
+
+#data
+<!DOCTYPE html><body><math contentScriptType='' contentStyleType='' externalResourcesRequired='' filterRes=''></math>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       contentscripttype=""
+|       contentstyletype=""
+|       externalresourcesrequired=""
+|       filterres=""
+
+#data
+<!DOCTYPE html><body><svg><altGlyph /><altGlyphDef /><altGlyphItem /><animateColor /><animateMotion /><animateTransform /><clipPath /><feBlend /><feColorMatrix /><feComponentTransfer /><feComposite /><feConvolveMatrix /><feDiffuseLighting /><feDisplacementMap /><feDistantLight /><feFlood /><feFuncA /><feFuncB /><feFuncG /><feFuncR /><feGaussianBlur /><feImage /><feMerge /><feMergeNode /><feMorphology /><feOffset /><fePointLight /><feSpecularLighting /><feSpotLight /><feTile /><feTurbulence /><foreignObject /><glyphRef /><linearGradient /><radialGradient /><textPath /></svg>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       <svg altGlyph>
+|       <svg altGlyphDef>
+|       <svg altGlyphItem>
+|       <svg animateColor>
+|       <svg animateMotion>
+|       <svg animateTransform>
+|       <svg clipPath>
+|       <svg feBlend>
+|       <svg feColorMatrix>
+|       <svg feComponentTransfer>
+|       <svg feComposite>
+|       <svg feConvolveMatrix>
+|       <svg feDiffuseLighting>
+|       <svg feDisplacementMap>
+|       <svg feDistantLight>
+|       <svg feFlood>
+|       <svg feFuncA>
+|       <svg feFuncB>
+|       <svg feFuncG>
+|       <svg feFuncR>
+|       <svg feGaussianBlur>
+|       <svg feImage>
+|       <svg feMerge>
+|       <svg feMergeNode>
+|       <svg feMorphology>
+|       <svg feOffset>
+|       <svg fePointLight>
+|       <svg feSpecularLighting>
+|       <svg feSpotLight>
+|       <svg feTile>
+|       <svg feTurbulence>
+|       <svg foreignObject>
+|       <svg glyphRef>
+|       <svg linearGradient>
+|       <svg radialGradient>
+|       <svg textPath>
+
+#data
+<!DOCTYPE html><body><svg><altglyph /><altglyphdef /><altglyphitem /><animatecolor /><animatemotion /><animatetransform /><clippath /><feblend /><fecolormatrix /><fecomponenttransfer /><fecomposite /><feconvolvematrix /><fediffuselighting /><fedisplacementmap /><fedistantlight /><feflood /><fefunca /><fefuncb /><fefuncg /><fefuncr /><fegaussianblur /><feimage /><femerge /><femergenode /><femorphology /><feoffset /><fepointlight /><fespecularlighting /><fespotlight /><fetile /><feturbulence /><foreignobject /><glyphref /><lineargradient /><radialgradient /><textpath /></svg>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       <svg altGlyph>
+|       <svg altGlyphDef>
+|       <svg altGlyphItem>
+|       <svg animateColor>
+|       <svg animateMotion>
+|       <svg animateTransform>
+|       <svg clipPath>
+|       <svg feBlend>
+|       <svg feColorMatrix>
+|       <svg feComponentTransfer>
+|       <svg feComposite>
+|       <svg feConvolveMatrix>
+|       <svg feDiffuseLighting>
+|       <svg feDisplacementMap>
+|       <svg feDistantLight>
+|       <svg feFlood>
+|       <svg feFuncA>
+|       <svg feFuncB>
+|       <svg feFuncG>
+|       <svg feFuncR>
+|       <svg feGaussianBlur>
+|       <svg feImage>
+|       <svg feMerge>
+|       <svg feMergeNode>
+|       <svg feMorphology>
+|       <svg feOffset>
+|       <svg fePointLight>
+|       <svg feSpecularLighting>
+|       <svg feSpotLight>
+|       <svg feTile>
+|       <svg feTurbulence>
+|       <svg foreignObject>
+|       <svg glyphRef>
+|       <svg linearGradient>
+|       <svg radialGradient>
+|       <svg textPath>
+
+#data
+<!DOCTYPE html><BODY><SVG><ALTGLYPH /><ALTGLYPHDEF /><ALTGLYPHITEM /><ANIMATECOLOR /><ANIMATEMOTION /><ANIMATETRANSFORM /><CLIPPATH /><FEBLEND /><FECOLORMATRIX /><FECOMPONENTTRANSFER /><FECOMPOSITE /><FECONVOLVEMATRIX /><FEDIFFUSELIGHTING /><FEDISPLACEMENTMAP /><FEDISTANTLIGHT /><FEFLOOD /><FEFUNCA /><FEFUNCB /><FEFUNCG /><FEFUNCR /><FEGAUSSIANBLUR /><FEIMAGE /><FEMERGE /><FEMERGENODE /><FEMORPHOLOGY /><FEOFFSET /><FEPOINTLIGHT /><FESPECULARLIGHTING /><FESPOTLIGHT /><FETILE /><FETURBULENCE /><FOREIGNOBJECT /><GLYPHREF /><LINEARGRADIENT /><RADIALGRADIENT /><TEXTPATH /></SVG>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       <svg altGlyph>
+|       <svg altGlyphDef>
+|       <svg altGlyphItem>
+|       <svg animateColor>
+|       <svg animateMotion>
+|       <svg animateTransform>
+|       <svg clipPath>
+|       <svg feBlend>
+|       <svg feColorMatrix>
+|       <svg feComponentTransfer>
+|       <svg feComposite>
+|       <svg feConvolveMatrix>
+|       <svg feDiffuseLighting>
+|       <svg feDisplacementMap>
+|       <svg feDistantLight>
+|       <svg feFlood>
+|       <svg feFuncA>
+|       <svg feFuncB>
+|       <svg feFuncG>
+|       <svg feFuncR>
+|       <svg feGaussianBlur>
+|       <svg feImage>
+|       <svg feMerge>
+|       <svg feMergeNode>
+|       <svg feMorphology>
+|       <svg feOffset>
+|       <svg fePointLight>
+|       <svg feSpecularLighting>
+|       <svg feSpotLight>
+|       <svg feTile>
+|       <svg feTurbulence>
+|       <svg foreignObject>
+|       <svg glyphRef>
+|       <svg linearGradient>
+|       <svg radialGradient>
+|       <svg textPath>
+
+#data
+<!DOCTYPE html><body><math><altGlyph /><altGlyphDef /><altGlyphItem /><animateColor /><animateMotion /><animateTransform /><clipPath /><feBlend /><feColorMatrix /><feComponentTransfer /><feComposite /><feConvolveMatrix /><feDiffuseLighting /><feDisplacementMap /><feDistantLight /><feFlood /><feFuncA /><feFuncB /><feFuncG /><feFuncR /><feGaussianBlur /><feImage /><feMerge /><feMergeNode /><feMorphology /><feOffset /><fePointLight /><feSpecularLighting /><feSpotLight /><feTile /><feTurbulence /><foreignObject /><glyphRef /><linearGradient /><radialGradient /><textPath /></math>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math altglyph>
+|       <math altglyphdef>
+|       <math altglyphitem>
+|       <math animatecolor>
+|       <math animatemotion>
+|       <math animatetransform>
+|       <math clippath>
+|       <math feblend>
+|       <math fecolormatrix>
+|       <math fecomponenttransfer>
+|       <math fecomposite>
+|       <math feconvolvematrix>
+|       <math fediffuselighting>
+|       <math fedisplacementmap>
+|       <math fedistantlight>
+|       <math feflood>
+|       <math fefunca>
+|       <math fefuncb>
+|       <math fefuncg>
+|       <math fefuncr>
+|       <math fegaussianblur>
+|       <math feimage>
+|       <math femerge>
+|       <math femergenode>
+|       <math femorphology>
+|       <math feoffset>
+|       <math fepointlight>
+|       <math fespecularlighting>
+|       <math fespotlight>
+|       <math fetile>
+|       <math feturbulence>
+|       <math foreignobject>
+|       <math glyphref>
+|       <math lineargradient>
+|       <math radialgradient>
+|       <math textpath>
+
+#data
+<!DOCTYPE html><body><svg><solidColor /></svg>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       <svg solidcolor>
diff --git a/tests/data/tree-construction/tests12.dat b/tests/data/tree-construction/tests12.dat
new file mode 100644
index 00000000..63107d27
--- /dev/null
+++ b/tests/data/tree-construction/tests12.dat
@@ -0,0 +1,62 @@
+#data
+<!DOCTYPE html><body><p>foo<math><mtext><i>baz</i></mtext><annotation-xml><svg><desc><b>eggs</b></desc><g><foreignObject><P>spam<TABLE><tr><td><img></td></table></foreignObject></g><g>quux</g></svg></annotation-xml></math>bar
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       "foo"
+|       <math math>
+|         <math mtext>
+|           <i>
+|             "baz"
+|         <math annotation-xml>
+|           <svg svg>
+|             <svg desc>
+|               <b>
+|                 "eggs"
+|             <svg g>
+|               <svg foreignObject>
+|                 <p>
+|                   "spam"
+|                 <table>
+|                   <tbody>
+|                     <tr>
+|                       <td>
+|                         <img>
+|             <svg g>
+|               "quux"
+|       "bar"
+
+#data
+<!DOCTYPE html><body>foo<math><mtext><i>baz</i></mtext><annotation-xml><svg><desc><b>eggs</b></desc><g><foreignObject><P>spam<TABLE><tr><td><img></td></table></foreignObject></g><g>quux</g></svg></annotation-xml></math>bar
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     "foo"
+|     <math math>
+|       <math mtext>
+|         <i>
+|           "baz"
+|       <math annotation-xml>
+|         <svg svg>
+|           <svg desc>
+|             <b>
+|               "eggs"
+|           <svg g>
+|             <svg foreignObject>
+|               <p>
+|                 "spam"
+|               <table>
+|                 <tbody>
+|                   <tr>
+|                     <td>
+|                       <img>
+|           <svg g>
+|             "quux"
+|     "bar"
diff --git a/tests/data/tree-construction/tests14.dat b/tests/data/tree-construction/tests14.dat
new file mode 100644
index 00000000..a08b7649
--- /dev/null
+++ b/tests/data/tree-construction/tests14.dat
@@ -0,0 +1,75 @@
+#data
+<!DOCTYPE html><html><body><xyz:abc></xyz:abc>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <xyz:abc>
+
+#data
+<!DOCTYPE html><html><body><xyz:abc></xyz:abc><span></span>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <xyz:abc>
+|     <span>
+
+#data
+<!DOCTYPE html><html><html abc:def=gh><xyz:abc></xyz:abc>
+#errors
+(1,38): non-html-root
+#document
+| <!DOCTYPE html>
+| <html>
+|   abc:def="gh"
+|   <head>
+|   <body>
+|     <xyz:abc>
+
+#data
+<!DOCTYPE html><html xml:lang=bar><html xml:lang=foo>
+#errors
+(1,53): non-html-root
+#document
+| <!DOCTYPE html>
+| <html>
+|   xml:lang="bar"
+|   <head>
+|   <body>
+
+#data
+<!DOCTYPE html><html 123=456>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   123="456"
+|   <head>
+|   <body>
+
+#data
+<!DOCTYPE html><html 123=456><html 789=012>
+#errors
+(1,43): non-html-root
+#document
+| <!DOCTYPE html>
+| <html>
+|   123="456"
+|   789="012"
+|   <head>
+|   <body>
+
+#data
+<!DOCTYPE html><html><body 789=012>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     789="012"
diff --git a/tests/data/tree-construction/tests15.dat b/tests/data/tree-construction/tests15.dat
new file mode 100644
index 00000000..93d06a87
--- /dev/null
+++ b/tests/data/tree-construction/tests15.dat
@@ -0,0 +1,216 @@
+#data
+<!DOCTYPE html><p><b><i><u></p> <p>X
+#errors
+(1,31): unexpected-end-tag
+(1,36): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <b>
+|         <i>
+|           <u>
+|     <b>
+|       <i>
+|         <u>
+|           " "
+|           <p>
+|             "X"
+
+#data
+<p><b><i><u></p>
+<p>X
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,16): unexpected-end-tag
+(2,4): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <b>
+|         <i>
+|           <u>
+|     <b>
+|       <i>
+|         <u>
+|           "
+"
+|           <p>
+|             "X"
+
+#data
+<!doctype html></html> <head>
+#errors
+(1,29): expected-eof-but-got-start-tag
+(1,29): unexpected-start-tag-ignored
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     " "
+
+#data
+<!doctype html></body><meta>
+#errors
+(1,28): unexpected-start-tag-after-body
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <meta>
+
+#data
+<html></html><!-- foo -->
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+| <!--  foo  -->
+
+#data
+<!doctype html></body><title>X</title>
+#errors
+(1,29): unexpected-start-tag-after-body
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <title>
+|       "X"
+
+#data
+<!doctype html><table> X<meta></table>
+#errors
+(1,23): foster-parenting-character
+(1,24): foster-parenting-character
+(1,30): foster-parenting-start-character
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     " X"
+|     <meta>
+|     <table>
+
+#data
+<!doctype html><table> x</table>
+#errors
+(1,23): foster-parenting-character
+(1,24): foster-parenting-character
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     " x"
+|     <table>
+
+#data
+<!doctype html><table> x </table>
+#errors
+(1,23): foster-parenting-character
+(1,24): foster-parenting-character
+(1,25): foster-parenting-character
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     " x "
+|     <table>
+
+#data
+<!doctype html><table><tr> x</table>
+#errors
+(1,27): foster-parenting-character
+(1,28): foster-parenting-character
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     " x"
+|     <table>
+|       <tbody>
+|         <tr>
+
+#data
+<!doctype html><table>X<style> <tr>x </style> </table>
+#errors
+(1,23): foster-parenting-character
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     "X"
+|     <table>
+|       <style>
+|         " <tr>x "
+|       " "
+
+#data
+<!doctype html><div><table><a>foo</a> <tr><td>bar</td> </tr></table></div>
+#errors
+(1,30): foster-parenting-start-tag
+(1,31): foster-parenting-character
+(1,32): foster-parenting-character
+(1,33): foster-parenting-character
+(1,37): foster-parenting-end-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       <a>
+|         "foo"
+|       <table>
+|         " "
+|         <tbody>
+|           <tr>
+|             <td>
+|               "bar"
+|             " "
+
+#data
+<frame></frame></frame><frameset><frame><frameset><frame></frameset><noframes></frameset><noframes>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,7): unexpected-start-tag-ignored
+(1,15): unexpected-end-tag
+(1,23): unexpected-end-tag
+(1,33): unexpected-start-tag
+(1,99): expected-named-closing-tag-but-got-eof
+(1,99): eof-in-frameset
+#document
+| <html>
+|   <head>
+|   <frameset>
+|     <frame>
+|     <frameset>
+|       <frame>
+|     <noframes>
+|       "</frameset><noframes>"
+
+#data
+<!DOCTYPE html><object></html>
+#errors
+(1,30): expected-body-in-scope
+(1,30): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <object>
diff --git a/tests/data/tree-construction/tests16.dat b/tests/data/tree-construction/tests16.dat
new file mode 100644
index 00000000..05f34c13
--- /dev/null
+++ b/tests/data/tree-construction/tests16.dat
@@ -0,0 +1,2602 @@
+#data
+<!doctype html><script>
+#errors
+(1,23): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|   <body>
+
+#data
+<!doctype html><script>a
+#errors
+(1,24): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "a"
+|   <body>
+
+#data
+<!doctype html><script><
+#errors
+(1,24): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<"
+|   <body>
+
+#data
+<!doctype html><script></
+#errors
+(1,25): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "</"
+|   <body>
+
+#data
+<!doctype html><script></S
+#errors
+(1,26): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "</S"
+|   <body>
+
+#data
+<!doctype html><script></SC
+#errors
+(1,27): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "</SC"
+|   <body>
+
+#data
+<!doctype html><script></SCR
+#errors
+(1,28): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "</SCR"
+|   <body>
+
+#data
+<!doctype html><script></SCRI
+#errors
+(1,29): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "</SCRI"
+|   <body>
+
+#data
+<!doctype html><script></SCRIP
+#errors
+(1,30): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "</SCRIP"
+|   <body>
+
+#data
+<!doctype html><script></SCRIPT
+#errors
+(1,31): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "</SCRIPT"
+|   <body>
+
+#data
+<!doctype html><script></SCRIPT 
+#errors
+(1,32): expected-attribute-name-but-got-eof
+(1,32): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:33) eof-in-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|   <body>
+
+#data
+<!doctype html><script></s
+#errors
+(1,26): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "</s"
+|   <body>
+
+#data
+<!doctype html><script></sc
+#errors
+(1,27): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "</sc"
+|   <body>
+
+#data
+<!doctype html><script></scr
+#errors
+(1,28): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "</scr"
+|   <body>
+
+#data
+<!doctype html><script></scri
+#errors
+(1,29): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "</scri"
+|   <body>
+
+#data
+<!doctype html><script></scrip
+#errors
+(1,30): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "</scrip"
+|   <body>
+
+#data
+<!doctype html><script></script
+#errors
+(1,31): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "</script"
+|   <body>
+
+#data
+<!doctype html><script></script 
+#errors
+(1,32): expected-attribute-name-but-got-eof
+(1,32): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:33) eof-in-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|   <body>
+
+#data
+<!doctype html><script><!
+#errors
+(1,25): expected-script-data-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!"
+|   <body>
+
+#data
+<!doctype html><script><!a
+#errors
+(1,26): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!a"
+|   <body>
+
+#data
+<!doctype html><script><!-
+#errors
+(1,26): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!-"
+|   <body>
+
+#data
+<!doctype html><script><!-a
+#errors
+(1,27): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!-a"
+|   <body>
+
+#data
+<!doctype html><script><!--
+#errors
+(1,27): expected-named-closing-tag-but-got-eof
+(1,27): unexpected-eof-in-text-mode
+#new-errors
+(1:28) eof-in-script-html-comment-like-text
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--"
+|   <body>
+
+#data
+<!doctype html><script><!--a
+#errors
+(1,28): expected-named-closing-tag-but-got-eof
+(1,28): unexpected-eof-in-text-mode
+#new-errors
+(1:29) eof-in-script-html-comment-like-text
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--a"
+|   <body>
+
+#data
+<!doctype html><script><!--<
+#errors
+(1,28): expected-named-closing-tag-but-got-eof
+(1,28): unexpected-eof-in-text-mode
+#new-errors
+(1:29) eof-in-script-html-comment-like-text
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<"
+|   <body>
+
+#data
+<!doctype html><script><!--<a
+#errors
+(1,29): expected-named-closing-tag-but-got-eof
+(1,29): unexpected-eof-in-text-mode
+#new-errors
+(1:30) eof-in-script-html-comment-like-text
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<a"
+|   <body>
+
+#data
+<!doctype html><script><!--</
+#errors
+(1,29): expected-named-closing-tag-but-got-eof
+(1,29): unexpected-eof-in-text-mode
+#new-errors
+(1:30) eof-in-script-html-comment-like-text
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--</"
+|   <body>
+
+#data
+<!doctype html><script><!--</script
+#errors
+(1,35): expected-named-closing-tag-but-got-eof
+(1,35): unexpected-eof-in-text-mode
+#new-errors
+(1:36) eof-in-script-html-comment-like-text
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--</script"
+|   <body>
+
+#data
+<!doctype html><script><!--</script 
+#errors
+(1,36): expected-attribute-name-but-got-eof
+(1,36): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:37) eof-in-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--"
+|   <body>
+
+#data
+<!doctype html><script><!--<s
+#errors
+(1,29): expected-named-closing-tag-but-got-eof
+(1,29): unexpected-eof-in-text-mode
+#new-errors
+(1:30) eof-in-script-html-comment-like-text
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<s"
+|   <body>
+
+#data
+<!doctype html><script><!--<script
+#errors
+(1,34): expected-named-closing-tag-but-got-eof
+(1,34): unexpected-eof-in-text-mode
+#new-errors
+(1:35) eof-in-script-html-comment-like-text
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script"
+|   <body>
+
+#data
+<!doctype html><script><!--<script 
+#errors
+(1,35): eof-in-script-in-script
+(1,35): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:36) eof-in-script-html-comment-like-text
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script "
+|   <body>
+
+#data
+<!doctype html><script><!--<script <
+#errors
+(1,36): eof-in-script-in-script
+(1,36): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:37) eof-in-script-html-comment-like-text
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script <"
+|   <body>
+
+#data
+<!doctype html><script><!--<script <a
+#errors
+(1,37): eof-in-script-in-script
+(1,37): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:38) eof-in-script-html-comment-like-text
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script <a"
+|   <body>
+
+#data
+<!doctype html><script><!--<script </
+#errors
+(1,37): eof-in-script-in-script
+(1,37): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:38) eof-in-script-html-comment-like-text
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script </"
+|   <body>
+
+#data
+<!doctype html><script><!--<script </s
+#errors
+(1,38): eof-in-script-in-script
+(1,38): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:39) eof-in-script-html-comment-like-text
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script </s"
+|   <body>
+
+#data
+<!doctype html><script><!--<script </script
+#errors
+(1,43): eof-in-script-in-script
+(1,43): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:44) eof-in-script-html-comment-like-text
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script </script"
+|   <body>
+
+#data
+<!doctype html><script><!--<script </scripta
+#errors
+(1,44): eof-in-script-in-script
+(1,44): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:45) eof-in-script-html-comment-like-text
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script </scripta"
+|   <body>
+
+#data
+<!doctype html><script><!--<script </script 
+#errors
+(1,44): expected-named-closing-tag-but-got-eof
+(1,44): unexpected-eof-in-text-mode
+#new-errors
+(1:45) eof-in-script-html-comment-like-text
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script </script "
+|   <body>
+
+#data
+<!doctype html><script><!--<script </script>
+#errors
+(1,44): expected-named-closing-tag-but-got-eof
+(1,44): unexpected-eof-in-text-mode
+#new-errors
+(1:45) eof-in-script-html-comment-like-text
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script </script>"
+|   <body>
+
+#data
+<!doctype html><script><!--<script </script/
+#errors
+(1,44): expected-named-closing-tag-but-got-eof
+(1,44): unexpected-eof-in-text-mode
+#new-errors
+(1:45) eof-in-script-html-comment-like-text
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script </script/"
+|   <body>
+
+#data
+<!doctype html><script><!--<script </script <
+#errors
+(1,45): expected-named-closing-tag-but-got-eof
+(1,45): unexpected-eof-in-text-mode
+#new-errors
+(1:46) eof-in-script-html-comment-like-text
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script </script <"
+|   <body>
+
+#data
+<!doctype html><script><!--<script </script <a
+#errors
+(1,46): expected-named-closing-tag-but-got-eof
+(1,46): unexpected-eof-in-text-mode
+#new-errors
+(1:47) eof-in-script-html-comment-like-text
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script </script <a"
+|   <body>
+
+#data
+<!doctype html><script><!--<script </script </
+#errors
+(1,46): expected-named-closing-tag-but-got-eof
+(1,46): unexpected-eof-in-text-mode
+#new-errors
+(1:47) eof-in-script-html-comment-like-text
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script </script </"
+|   <body>
+
+#data
+<!doctype html><script><!--<script </script </script
+#errors
+(1,52): expected-named-closing-tag-but-got-eof
+(1,52): unexpected-eof-in-text-mode
+#new-errors
+(1:53) eof-in-script-html-comment-like-text
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script </script </script"
+|   <body>
+
+#data
+<!doctype html><script><!--<script </script </script 
+#errors
+(1,53): expected-attribute-name-but-got-eof
+(1,53): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:54) eof-in-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script </script "
+|   <body>
+
+#data
+<!doctype html><script><!--<script </script </script/
+#errors
+(1,53): unexpected-EOF-after-solidus-in-tag
+(1,53): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:54) eof-in-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script </script "
+|   <body>
+
+#data
+<!doctype html><script><!--<script </script </script>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script </script "
+|   <body>
+
+#data
+<!doctype html><script><!--<script -
+#errors
+(1,36): eof-in-script-in-script
+(1,36): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:37) eof-in-script-html-comment-like-text
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script -"
+|   <body>
+
+#data
+<!doctype html><script><!--<script -a
+#errors
+(1,37): eof-in-script-in-script
+(1,37): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:38) eof-in-script-html-comment-like-text
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script -a"
+|   <body>
+
+#data
+<!doctype html><script><!--<script -<
+#errors
+(1,37): eof-in-script-in-script
+(1,37): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:38) eof-in-script-html-comment-like-text
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script -<"
+|   <body>
+
+#data
+<!doctype html><script><!--<script --
+#errors
+(1,37): eof-in-script-in-script
+(1,37): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:38) eof-in-script-html-comment-like-text
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script --"
+|   <body>
+
+#data
+<!doctype html><script><!--<script --a
+#errors
+(1,38): eof-in-script-in-script
+(1,38): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:39) eof-in-script-html-comment-like-text
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script --a"
+|   <body>
+
+#data
+<!doctype html><script><!--<script --<
+#errors
+(1,38): eof-in-script-in-script
+(1,38): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:39) eof-in-script-html-comment-like-text
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script --<"
+|   <body>
+
+#data
+<!doctype html><script><!--<script -->
+#errors
+(1,38): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script -->"
+|   <body>
+
+#data
+<!doctype html><script><!--<script --><
+#errors
+(1,39): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script --><"
+|   <body>
+
+#data
+<!doctype html><script><!--<script --></
+#errors
+(1,40): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script --></"
+|   <body>
+
+#data
+<!doctype html><script><!--<script --></script
+#errors
+(1,46): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script --></script"
+|   <body>
+
+#data
+<!doctype html><script><!--<script --></script 
+#errors
+(1,47): expected-attribute-name-but-got-eof
+(1,47): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:48) eof-in-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script -->"
+|   <body>
+
+#data
+<!doctype html><script><!--<script --></script/
+#errors
+(1,47): unexpected-EOF-after-solidus-in-tag
+(1,47): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:48) eof-in-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script -->"
+|   <body>
+
+#data
+<!doctype html><script><!--<script --></script>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script -->"
+|   <body>
+
+#data
+<!doctype html><script><!--<script><\/script>--></script>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script><\/script>-->"
+|   <body>
+
+#data
+<!doctype html><script><!--<script></scr'+'ipt>--></script>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script></scr'+'ipt>-->"
+|   <body>
+
+#data
+<!doctype html><script><!--<script></script><script></script></script>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script></script><script></script>"
+|   <body>
+
+#data
+<!doctype html><script><!--<script></script><script></script>--><!--</script>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script></script><script></script>--><!--"
+|   <body>
+
+#data
+<!doctype html><script><!--<script></script><script></script>-- ></script>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script></script><script></script>-- >"
+|   <body>
+
+#data
+<!doctype html><script><!--<script></script><script></script>- -></script>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script></script><script></script>- ->"
+|   <body>
+
+#data
+<!doctype html><script><!--<script></script><script></script>- - ></script>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script></script><script></script>- - >"
+|   <body>
+
+#data
+<!doctype html><script><!--<script></script><script></script>-></script>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script></script><script></script>->"
+|   <body>
+
+#data
+<!doctype html><script><!--<script>--!></script>X
+#errors
+(1,49): expected-named-closing-tag-but-got-eof
+(1,49): unexpected-EOF-in-text-mode
+#new-errors
+(1:50) eof-in-script-html-comment-like-text
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script>--!></script>X"
+|   <body>
+
+#data
+<!doctype html><script><!--<scr'+'ipt></script>--></script>
+#errors
+(1,59): unexpected-end-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<scr'+'ipt>"
+|   <body>
+|     "-->"
+
+#data
+<!doctype html><script><!--<script></scr'+'ipt></script>X
+#errors
+(1,57): expected-named-closing-tag-but-got-eof
+(1,57): unexpected-eof-in-text-mode
+#new-errors
+(1:58) eof-in-script-html-comment-like-text
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script></scr'+'ipt></script>X"
+|   <body>
+
+#data
+<!doctype html><style><!--<style></style>--></style>
+#errors
+(1,52): unexpected-end-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <style>
+|       "<!--<style>"
+|   <body>
+|     "-->"
+
+#data
+<!doctype html><style><!--</style>X
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <style>
+|       "<!--"
+|   <body>
+|     "X"
+
+#data
+<!doctype html><style><!--...</style>...--></style>
+#errors
+(1,51): unexpected-end-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <style>
+|       "<!--..."
+|   <body>
+|     "...-->"
+
+#data
+<!doctype html><style><!--<br><html xmlns:v="urn:schemas-microsoft-com:vml"><!--[if !mso]><style></style>X
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <style>
+|       "<!--<br><html xmlns:v="urn:schemas-microsoft-com:vml"><!--[if !mso]><style>"
+|   <body>
+|     "X"
+
+#data
+<!doctype html><style><!--...<style><!--...--!></style>--></style>
+#errors
+(1,66): unexpected-end-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <style>
+|       "<!--...<style><!--...--!>"
+|   <body>
+|     "-->"
+
+#data
+<!doctype html><style><!--...</style><!-- --><style>@import ...</style>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <style>
+|       "<!--..."
+|     <!--   -->
+|     <style>
+|       "@import ..."
+|   <body>
+
+#data
+<!doctype html><style>...<style><!--...</style><!-- --></style>
+#errors
+(1,63): unexpected-end-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <style>
+|       "...<style><!--..."
+|     <!--   -->
+|   <body>
+
+#data
+<!doctype html><style>...<!--[if IE]><style>...</style>X
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <style>
+|       "...<!--[if IE]><style>..."
+|   <body>
+|     "X"
+
+#data
+<!doctype html><title><!--<title></title>--></title>
+#errors
+(1,52): unexpected-end-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <title>
+|       "<!--<title>"
+|   <body>
+|     "-->"
+
+#data
+<!doctype html><title>&lt;/title></title>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <title>
+|       "</title>"
+|   <body>
+
+#data
+<!doctype html><title>foo/title><link></head><body>X
+#errors
+(1,52): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <title>
+|       "foo/title><link></head><body>X"
+|   <body>
+
+#data
+<!doctype html><noscript><!--<noscript></noscript>--></noscript>
+#errors
+(1,64): unexpected-end-tag
+#script-on
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <noscript>
+|       "<!--<noscript>"
+|   <body>
+|     "-->"
+
+#data
+<!doctype html><noscript><!--<noscript></noscript>--></noscript>
+#errors
+#script-off
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <noscript>
+|       <!-- <noscript></noscript> -->
+|   <body>
+
+#data
+<!doctype html><noscript><!--</noscript>X<noscript>--></noscript>
+#errors
+#script-on
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <noscript>
+|       "<!--"
+|   <body>
+|     "X"
+|     <noscript>
+|       "-->"
+
+#data
+<!doctype html><noscript><!--</noscript>X<noscript>--></noscript>
+#errors
+#script-off
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <noscript>
+|       <!-- </noscript>X<noscript> -->
+|   <body>
+
+#data
+<!doctype html><noscript><iframe></noscript>X
+#errors
+#script-on
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <noscript>
+|       "<iframe>"
+|   <body>
+|     "X"
+
+#data
+<!doctype html><noscript><iframe></noscript>X
+#errors
+ * (1,34) unexpected token in head noscript
+ * (1,46) unexpected EOF
+#script-off
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <noscript>
+|   <body>
+|     <iframe>
+|       "</noscript>X"
+
+#data
+<!doctype html><noframes><!--<noframes></noframes>--></noframes>
+#errors
+(1,64): unexpected-end-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <noframes>
+|       "<!--<noframes>"
+|   <body>
+|     "-->"
+
+#data
+<!doctype html><noframes><body><script><!--...</script></body></noframes></html>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <noframes>
+|       "<body><script><!--...</script></body>"
+|   <body>
+
+#data
+<!doctype html><textarea><!--<textarea></textarea>--></textarea>
+#errors
+(1,64): unexpected-end-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <textarea>
+|       "<!--<textarea>"
+|     "-->"
+
+#data
+<!doctype html><textarea>&lt;/textarea></textarea>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <textarea>
+|       "</textarea>"
+
+#data
+<!doctype html><textarea>&lt;</textarea>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <textarea>
+|       "<"
+
+#data
+<!doctype html><textarea>a&lt;b</textarea>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <textarea>
+|       "a<b"
+
+#data
+<!doctype html><iframe><!--<iframe></iframe>--></iframe>
+#errors
+(1,56): unexpected-end-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <iframe>
+|       "<!--<iframe>"
+|     "-->"
+
+#data
+<!doctype html><iframe>...<!--X->...<!--/X->...</iframe>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <iframe>
+|       "...<!--X->...<!--/X->..."
+
+#data
+<!doctype html><xmp><!--<xmp></xmp>--></xmp>
+#errors
+(1,44): unexpected-end-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <xmp>
+|       "<!--<xmp>"
+|     "-->"
+
+#data
+<!doctype html><noembed><!--<noembed></noembed>--></noembed>
+#errors
+(1,60): unexpected-end-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <noembed>
+|       "<!--<noembed>"
+|     "-->"
+
+#data
+<script>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,8): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|     <script>
+|   <body>
+
+#data
+<script>a
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,9): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|     <script>
+|       "a"
+|   <body>
+
+#data
+<script><
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,9): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<"
+|   <body>
+
+#data
+<script></
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,10): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|     <script>
+|       "</"
+|   <body>
+
+#data
+<script></S
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,11): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|     <script>
+|       "</S"
+|   <body>
+
+#data
+<script></SC
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,12): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|     <script>
+|       "</SC"
+|   <body>
+
+#data
+<script></SCR
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,13): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|     <script>
+|       "</SCR"
+|   <body>
+
+#data
+<script></SCRI
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,14): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|     <script>
+|       "</SCRI"
+|   <body>
+
+#data
+<script></SCRIP
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,15): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|     <script>
+|       "</SCRIP"
+|   <body>
+
+#data
+<script></SCRIPT
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,16): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|     <script>
+|       "</SCRIPT"
+|   <body>
+
+#data
+<script></SCRIPT 
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,17): expected-attribute-name-but-got-eof
+(1,17): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:18) eof-in-tag
+#document
+| <html>
+|   <head>
+|     <script>
+|   <body>
+
+#data
+<script></s
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,11): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|     <script>
+|       "</s"
+|   <body>
+
+#data
+<script></sc
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,12): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|     <script>
+|       "</sc"
+|   <body>
+
+#data
+<script></scr
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,13): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|     <script>
+|       "</scr"
+|   <body>
+
+#data
+<script></scri
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,14): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|     <script>
+|       "</scri"
+|   <body>
+
+#data
+<script></scrip
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,15): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|     <script>
+|       "</scrip"
+|   <body>
+
+#data
+<script></script
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,16): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|     <script>
+|       "</script"
+|   <body>
+
+#data
+<script></script 
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,17): expected-attribute-name-but-got-eof
+(1,17): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:18) eof-in-tag
+#document
+| <html>
+|   <head>
+|     <script>
+|   <body>
+
+#data
+<script><!
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,10): expected-script-data-but-got-eof
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!"
+|   <body>
+
+#data
+<script><!a
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,11): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!a"
+|   <body>
+
+#data
+<script><!-
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,11): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!-"
+|   <body>
+
+#data
+<script><!-a
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,12): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!-a"
+|   <body>
+
+#data
+<script><!--
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,12): expected-named-closing-tag-but-got-eof
+(1,12): unexpected-eof-in-text-mode
+#new-errors
+(1:13) eof-in-script-html-comment-like-text
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--"
+|   <body>
+
+#data
+<script><!--a
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,13): expected-named-closing-tag-but-got-eof
+(1,13): unexpected-eof-in-text-mode
+#new-errors
+(1:14) eof-in-script-html-comment-like-text
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--a"
+|   <body>
+
+#data
+<script><!--<
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,13): expected-named-closing-tag-but-got-eof
+(1,13): unexpected-eof-in-text-mode
+#new-errors
+(1:14) eof-in-script-html-comment-like-text
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<"
+|   <body>
+
+#data
+<script><!--<a
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,14): expected-named-closing-tag-but-got-eof
+(1,14): unexpected-eof-in-text-mode
+#new-errors
+(1:15) eof-in-script-html-comment-like-text
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<a"
+|   <body>
+
+#data
+<script><!--</
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,14): expected-named-closing-tag-but-got-eof
+(1,14): unexpected-eof-in-text-mode
+#new-errors
+(1:15) eof-in-script-html-comment-like-text
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--</"
+|   <body>
+
+#data
+<script><!--</script
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,20): expected-named-closing-tag-but-got-eof
+(1,20): unexpected-eof-in-text-mode
+#new-errors
+(1:21) eof-in-script-html-comment-like-text
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--</script"
+|   <body>
+
+#data
+<script><!--</script 
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,21): expected-attribute-name-but-got-eof
+(1,21): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:22) eof-in-tag
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--"
+|   <body>
+
+#data
+<script><!--<s
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,14): expected-named-closing-tag-but-got-eof
+(1,14): unexpected-eof-in-text-mode
+#new-errors
+(1:15) eof-in-script-html-comment-like-text
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<s"
+|   <body>
+
+#data
+<script><!--<script
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,19): expected-named-closing-tag-but-got-eof
+(1,19): unexpected-eof-in-text-mode
+#new-errors
+(1:20) eof-in-script-html-comment-like-text
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script"
+|   <body>
+
+#data
+<script><!--<script 
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,20): eof-in-script-in-script
+(1,20): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:21) eof-in-script-html-comment-like-text
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script "
+|   <body>
+
+#data
+<script><!--<script <
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,21): eof-in-script-in-script
+(1,21): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:22) eof-in-script-html-comment-like-text
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script <"
+|   <body>
+
+#data
+<script><!--<script <a
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,22): eof-in-script-in-script
+(1,22): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:23) eof-in-script-html-comment-like-text
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script <a"
+|   <body>
+
+#data
+<script><!--<script </
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,22): eof-in-script-in-script
+(1,22): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:23) eof-in-script-html-comment-like-text
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script </"
+|   <body>
+
+#data
+<script><!--<script </s
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,23): eof-in-script-in-script
+(1,23): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:24) eof-in-script-html-comment-like-text
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script </s"
+|   <body>
+
+#data
+<script><!--<script </script
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,28): eof-in-script-in-script
+(1,28): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:29) eof-in-script-html-comment-like-text
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script </script"
+|   <body>
+
+#data
+<script><!--<script </scripta
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,29): eof-in-script-in-script
+(1,29): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:30) eof-in-script-html-comment-like-text
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script </scripta"
+|   <body>
+
+#data
+<script><!--<script </script 
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,29): expected-named-closing-tag-but-got-eof
+(1,29): unexpected-eof-in-text-mode
+#new-errors
+(1:30) eof-in-script-html-comment-like-text
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script </script "
+|   <body>
+
+#data
+<script><!--<script </script>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,29): expected-named-closing-tag-but-got-eof
+(1,29): unexpected-eof-in-text-mode
+#new-errors
+(1:30) eof-in-script-html-comment-like-text
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script </script>"
+|   <body>
+
+#data
+<script><!--<script </script/
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,29): expected-named-closing-tag-but-got-eof
+(1,29): unexpected-eof-in-text-mode
+#new-errors
+(1:30) eof-in-script-html-comment-like-text
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script </script/"
+|   <body>
+
+#data
+<script><!--<script </script <
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,30): expected-named-closing-tag-but-got-eof
+(1,30): unexpected-eof-in-text-mode
+#new-errors
+(1:31) eof-in-script-html-comment-like-text
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script </script <"
+|   <body>
+
+#data
+<script><!--<script </script <a
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,31): expected-named-closing-tag-but-got-eof
+(1,31): unexpected-eof-in-text-mode
+#new-errors
+(1:32) eof-in-script-html-comment-like-text
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script </script <a"
+|   <body>
+
+#data
+<script><!--<script </script </
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,31): expected-named-closing-tag-but-got-eof
+(1,31): unexpected-eof-in-text-mode
+#new-errors
+(1:32) eof-in-script-html-comment-like-text
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script </script </"
+|   <body>
+
+#data
+<script><!--<script </script </script
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,37): expected-named-closing-tag-but-got-eof
+(1,37): unexpected-eof-in-text-mode
+#new-errors
+(1:38) eof-in-script-html-comment-like-text
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script </script </script"
+|   <body>
+
+#data
+<script><!--<script </script </script 
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,38): expected-attribute-name-but-got-eof
+(1,38): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:39) eof-in-tag
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script </script "
+|   <body>
+
+#data
+<script><!--<script </script </script/
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,38): unexpected-EOF-after-solidus-in-tag
+(1,38): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:39) eof-in-tag
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script </script "
+|   <body>
+
+#data
+<script><!--<script </script </script>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script </script "
+|   <body>
+
+#data
+<script><!--<script -
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,21): eof-in-script-in-script
+(1,21): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:22) eof-in-script-html-comment-like-text
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script -"
+|   <body>
+
+#data
+<script><!--<script -a
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,22): eof-in-script-in-script
+(1,22): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:23) eof-in-script-html-comment-like-text
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script -a"
+|   <body>
+
+#data
+<script><!--<script --
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,22): eof-in-script-in-script
+(1,22): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:23) eof-in-script-html-comment-like-text
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script --"
+|   <body>
+
+#data
+<script><!--<script --a
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,23): eof-in-script-in-script
+(1,23): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:24) eof-in-script-html-comment-like-text
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script --a"
+|   <body>
+
+#data
+<script><!--<script -->
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,23): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script -->"
+|   <body>
+
+#data
+<script><!--<script --><
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,24): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script --><"
+|   <body>
+
+#data
+<script><!--<script --></
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,25): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script --></"
+|   <body>
+
+#data
+<script><!--<script --></script
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,31): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script --></script"
+|   <body>
+
+#data
+<script><!--<script --></script 
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,32): expected-attribute-name-but-got-eof
+(1,32): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:33) eof-in-tag
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script -->"
+|   <body>
+
+#data
+<script><!--<script --></script/
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,32): unexpected-EOF-after-solidus-in-tag
+(1,32): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:33) eof-in-tag
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script -->"
+|   <body>
+
+#data
+<script><!--<script --></script>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script -->"
+|   <body>
+
+#data
+<script><!--<script><\/script>--></script>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script><\/script>-->"
+|   <body>
+
+#data
+<script><!--<script></scr'+'ipt>--></script>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script></scr'+'ipt>-->"
+|   <body>
+
+#data
+<script><!--<script></script><script></script></script>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script></script><script></script>"
+|   <body>
+
+#data
+<script><!--<script></script><script></script>--><!--</script>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script></script><script></script>--><!--"
+|   <body>
+
+#data
+<script><!--<script></script><script></script>-- ></script>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script></script><script></script>-- >"
+|   <body>
+
+#data
+<script><!--<script></script><script></script>- -></script>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script></script><script></script>- ->"
+|   <body>
+
+#data
+<script><!--<script></script><script></script>- - ></script>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script></script><script></script>- - >"
+|   <body>
+
+#data
+<script><!--<script></script><script></script>-></script>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script></script><script></script>->"
+|   <body>
+
+#data
+<script><!--<script>--!></script>X
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,34): expected-named-closing-tag-but-got-eof
+(1,34): unexpected-eof-in-text-mode
+#new-errors
+(1:35) eof-in-script-html-comment-like-text
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script>--!></script>X"
+|   <body>
+
+#data
+<script><!--<scr'+'ipt></script>--></script>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,44): unexpected-end-tag
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<scr'+'ipt>"
+|   <body>
+|     "-->"
+
+#data
+<script><!--<script></scr'+'ipt></script>X
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,42): expected-named-closing-tag-but-got-eof
+(1,42): unexpected-eof-in-text-mode
+#new-errors
+(1:43) eof-in-script-html-comment-like-text
+#document
+| <html>
+|   <head>
+|     <script>
+|       "<!--<script></scr'+'ipt></script>X"
+|   <body>
+
+#data
+<style><!--<style></style>--></style>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,37): unexpected-end-tag
+#document
+| <html>
+|   <head>
+|     <style>
+|       "<!--<style>"
+|   <body>
+|     "-->"
+
+#data
+<style><!--</style>X
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|     <style>
+|       "<!--"
+|   <body>
+|     "X"
+
+#data
+<style><!--...</style>...--></style>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,36): unexpected-end-tag
+#document
+| <html>
+|   <head>
+|     <style>
+|       "<!--..."
+|   <body>
+|     "...-->"
+
+#data
+<style><!--<br><html xmlns:v="urn:schemas-microsoft-com:vml"><!--[if !mso]><style></style>X
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|     <style>
+|       "<!--<br><html xmlns:v="urn:schemas-microsoft-com:vml"><!--[if !mso]><style>"
+|   <body>
+|     "X"
+
+#data
+<style><!--...<style><!--...--!></style>--></style>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,51): unexpected-end-tag
+#document
+| <html>
+|   <head>
+|     <style>
+|       "<!--...<style><!--...--!>"
+|   <body>
+|     "-->"
+
+#data
+<style><!--...</style><!-- --><style>@import ...</style>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|     <style>
+|       "<!--..."
+|     <!--   -->
+|     <style>
+|       "@import ..."
+|   <body>
+
+#data
+<style>...<style><!--...</style><!-- --></style>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,48): unexpected-end-tag
+#document
+| <html>
+|   <head>
+|     <style>
+|       "...<style><!--..."
+|     <!--   -->
+|   <body>
+
+#data
+<style>...<!--[if IE]><style>...</style>X
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|     <style>
+|       "...<!--[if IE]><style>..."
+|   <body>
+|     "X"
+
+#data
+<title><!--<title></title>--></title>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,37): unexpected-end-tag
+#document
+| <html>
+|   <head>
+|     <title>
+|       "<!--<title>"
+|   <body>
+|     "-->"
+
+#data
+<title>&lt;/title></title>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|     <title>
+|       "</title>"
+|   <body>
+
+#data
+<title>foo/title><link></head><body>X
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,37): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|     <title>
+|       "foo/title><link></head><body>X"
+|   <body>
+
+#data
+<noscript><!--<noscript></noscript>--></noscript>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+(1,49): unexpected-end-tag
+#script-on
+#document
+| <html>
+|   <head>
+|     <noscript>
+|       "<!--<noscript>"
+|   <body>
+|     "-->"
+
+#data
+<noscript><!--<noscript></noscript>--></noscript>
+#errors
+ * (1,11) missing DOCTYPE
+#script-off
+#document
+| <html>
+|   <head>
+|     <noscript>
+|       <!-- <noscript></noscript> -->
+|   <body>
+
+#data
+<noscript><!--</noscript>X<noscript>--></noscript>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+#script-on
+#document
+| <html>
+|   <head>
+|     <noscript>
+|       "<!--"
+|   <body>
+|     "X"
+|     <noscript>
+|       "-->"
+
+#data
+<noscript><!--</noscript>X<noscript>--></noscript>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+#script-off
+#document
+| <html>
+|   <head>
+|     <noscript>
+|       <!-- </noscript>X<noscript> -->
+|   <body>
+
+#data
+<noscript><iframe></noscript>X
+#errors
+(1,10): expected-doctype-but-got-start-tag
+#script-on
+#document
+| <html>
+|   <head>
+|     <noscript>
+|       "<iframe>"
+|   <body>
+|     "X"
+
+#data
+<noscript><iframe></noscript>X
+#errors
+ * (1,11) missing DOCTYPE
+ * (1,19) unexpected token in head noscript
+ * (1,31) unexpected EOF
+#script-off
+#document
+| <html>
+|   <head>
+|     <noscript>
+|   <body>
+|     <iframe>
+|       "</noscript>X"
+
+#data
+<noframes><!--<noframes></noframes>--></noframes>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+(1,49): unexpected-end-tag
+#document
+| <html>
+|   <head>
+|     <noframes>
+|       "<!--<noframes>"
+|   <body>
+|     "-->"
+
+#data
+<noframes><body><script><!--...</script></body></noframes></html>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|     <noframes>
+|       "<body><script><!--...</script></body>"
+|   <body>
+
+#data
+<textarea><!--<textarea></textarea>--></textarea>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+(1,49): unexpected-end-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <textarea>
+|       "<!--<textarea>"
+|     "-->"
+
+#data
+<textarea>&lt;/textarea></textarea>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <textarea>
+|       "</textarea>"
+
+#data
+<iframe><!--<iframe></iframe>--></iframe>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,41): unexpected-end-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <iframe>
+|       "<!--<iframe>"
+|     "-->"
+
+#data
+<iframe>...<!--X->...<!--/X->...</iframe>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <iframe>
+|       "...<!--X->...<!--/X->..."
+
+#data
+<xmp><!--<xmp></xmp>--></xmp>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,29): unexpected-end-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <xmp>
+|       "<!--<xmp>"
+|     "-->"
+
+#data
+<noembed><!--<noembed></noembed>--></noembed>
+#errors
+(1,9): expected-doctype-but-got-start-tag
+(1,45): unexpected-end-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <noembed>
+|       "<!--<noembed>"
+|     "-->"
+
+#data
+<!doctype html><table>
+
+#errors
+(2,0): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       "
+"
+
+#data
+<!doctype html><table><td><span><font></span><span>
+#errors
+(1,26): unexpected-cell-in-table-body
+(1,45): unexpected-end-tag
+(1,51): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             <span>
+|               <font>
+|             <font>
+|               <span>
+
+#data
+<!doctype html><form><table></form><form></table></form>
+#errors
+(1,35): unexpected-end-tag-implies-table-voodoo
+(1,35): unexpected-end-tag
+(1,41): unexpected-form-in-table
+(1,56): unexpected-end-tag
+(1,56): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <form>
+|       <table>
+|         <form>
diff --git a/tests/data/tree-construction/tests17.dat b/tests/data/tree-construction/tests17.dat
new file mode 100644
index 00000000..1c472d1d
--- /dev/null
+++ b/tests/data/tree-construction/tests17.dat
@@ -0,0 +1,177 @@
+#data
+<!doctype html><table><tbody><select><tr>
+#errors
+(1,30): unexpected-start-tag
+(1,42): premature-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|     <table>
+|       <tbody>
+|         <tr>
+
+#data
+<!doctype html><table><tr><select><td>
+#errors
+(1,27): unexpected-start-tag
+(1,39): premature-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+
+#data
+<!doctype html><table><tr><td><select><td>
+#errors
+(1,42): unexpected-table-element-start-tag-in-select-in-table
+(1,42): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             <select>
+|           <td>
+
+#data
+<!doctype html><table><tr><th><select><td>
+#errors
+(1,42): unexpected-table-element-start-tag-in-select-in-table
+(1,42): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <th>
+|             <select>
+|           <td>
+
+#data
+<!doctype html><table><caption><select><tr>
+#errors
+(1,43): unexpected-table-element-start-tag-in-select-in-table
+(1,43): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <caption>
+|         <select>
+|       <tbody>
+|         <tr>
+
+#data
+<!doctype html><select><tr>
+#errors
+(1,27): unexpected-start-tag-in-select
+(1,27): eof-in-select
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <select>
+
+#data
+<!doctype html><select><td>
+#errors
+(1,27): unexpected-start-tag-in-select
+(1,27): eof-in-select
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <select>
+
+#data
+<!doctype html><select><th>
+#errors
+(1,27): unexpected-start-tag-in-select
+(1,27): eof-in-select
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <select>
+
+#data
+<!doctype html><select><tbody>
+#errors
+(1,30): unexpected-start-tag-in-select
+(1,30): eof-in-select
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <select>
+
+#data
+<!doctype html><select><thead>
+#errors
+(1,30): unexpected-start-tag-in-select
+(1,30): eof-in-select
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <select>
+
+#data
+<!doctype html><select><tfoot>
+#errors
+(1,30): unexpected-start-tag-in-select
+(1,30): eof-in-select
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <select>
+
+#data
+<!doctype html><select><caption>
+#errors
+(1,32): unexpected-start-tag-in-select
+(1,32): eof-in-select
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <select>
+
+#data
+<!doctype html><table><tr></table>a
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|     "a"
diff --git a/tests/data/tree-construction/tests18.dat b/tests/data/tree-construction/tests18.dat
new file mode 100644
index 00000000..a3bb69a1
--- /dev/null
+++ b/tests/data/tree-construction/tests18.dat
@@ -0,0 +1,572 @@
+#data
+<plaintext></plaintext>
+#errors
+11: Start tag seen without seeing a doctype first. Expected “<!DOCTYPE html>”.
+23: End of file seen and there were open elements.
+#document
+| <html>
+|   <head>
+|   <body>
+|     <plaintext>
+|       "</plaintext>"
+
+#data
+<!doctype html><plaintext></plaintext>
+#errors
+(1,38): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <plaintext>
+|       "</plaintext>"
+
+#data
+<!doctype html><html><plaintext></plaintext>
+#errors
+44: End of file seen and there were open elements.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <plaintext>
+|       "</plaintext>"
+
+#data
+<!doctype html><head><plaintext></plaintext>
+#errors
+44: End of file seen and there were open elements.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <plaintext>
+|       "</plaintext>"
+
+#data
+<!doctype html><html><noscript><plaintext></plaintext>
+#errors
+42: Bad start tag in “plaintext” in “head”.
+54: End of file seen and there were open elements.
+#script-off
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <noscript>
+|   <body>
+|     <plaintext>
+|       "</plaintext>"
+
+#data
+<!doctype html></head><plaintext></plaintext>
+#errors
+45: End of file seen and there were open elements.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <plaintext>
+|       "</plaintext>"
+
+#data
+<!doctype html><body><plaintext></plaintext>
+#errors
+44: End of file seen and there were open elements.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <plaintext>
+|       "</plaintext>"
+
+#data
+<!doctype html><table><plaintext></plaintext>
+#errors
+(1,33): foster-parenting-start-tag
+(1,46): foster-parenting-character
+(1,46): foster-parenting-character
+(1,46): foster-parenting-character
+(1,46): foster-parenting-character
+(1,46): foster-parenting-character
+(1,46): foster-parenting-character
+(1,46): foster-parenting-character
+(1,46): foster-parenting-character
+(1,46): foster-parenting-character
+(1,46): foster-parenting-character
+(1,46): foster-parenting-character
+(1,46): foster-parenting-character
+(1,46): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <plaintext>
+|       "</plaintext>"
+|     <table>
+
+#data
+<!doctype html><table><tbody><plaintext></plaintext>
+#errors
+(1,40): foster-parenting-start-tag
+(1,53): foster-parenting-character
+(1,53): foster-parenting-character
+(1,53): foster-parenting-character
+(1,53): foster-parenting-character
+(1,53): foster-parenting-character
+(1,53): foster-parenting-character
+(1,53): foster-parenting-character
+(1,53): foster-parenting-character
+(1,53): foster-parenting-character
+(1,53): foster-parenting-character
+(1,53): foster-parenting-character
+(1,53): foster-parenting-character
+(1,53): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <plaintext>
+|       "</plaintext>"
+|     <table>
+|       <tbody>
+
+#data
+<!doctype html><table><tbody><tr><plaintext></plaintext>
+#errors
+(1,44): foster-parenting-start-tag
+(1,57): foster-parenting-character
+(1,57): foster-parenting-character
+(1,57): foster-parenting-character
+(1,57): foster-parenting-character
+(1,57): foster-parenting-character
+(1,57): foster-parenting-character
+(1,57): foster-parenting-character
+(1,57): foster-parenting-character
+(1,57): foster-parenting-character
+(1,57): foster-parenting-character
+(1,57): foster-parenting-character
+(1,57): foster-parenting-character
+(1,57): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <plaintext>
+|       "</plaintext>"
+|     <table>
+|       <tbody>
+|         <tr>
+
+#data
+<!doctype html><table><td><plaintext></plaintext>
+#errors
+(1,26): unexpected-cell-in-table-body
+(1,49): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             <plaintext>
+|               "</plaintext>"
+
+#data
+<!doctype html><table><caption><plaintext></plaintext>
+#errors
+(1,54): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <caption>
+|         <plaintext>
+|           "</plaintext>"
+
+#data
+<!doctype html><table><colgroup><plaintext></plaintext>
+#errors
+(1,43): foster-parenting-start-tag
+(1,56): foster-parenting-character
+(1,56): foster-parenting-character
+(1,56): foster-parenting-character
+(1,56): foster-parenting-character
+(1,56): foster-parenting-character
+(1,56): foster-parenting-character
+(1,56): foster-parenting-character
+(1,56): foster-parenting-character
+(1,56): foster-parenting-character
+(1,56): foster-parenting-character
+(1,56): foster-parenting-character
+(1,56): foster-parenting-character
+55: End of file seen and there were open elements.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <plaintext>
+|       "</plaintext>"
+|     <table>
+|       <colgroup>
+
+#data
+<!doctype html><select><plaintext></plaintext>X
+#errors
+1:48: ERROR: Premature end of file. Currently open tags: html, body, select, plaintext.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <plaintext>
+|         "</plaintext>X"
+
+#data
+<!doctype html><table><select><plaintext>a<caption>b
+#errors
+1:23: ERROR: Start tag 'select' isn't allowed here. Currently open tags: html, body, table.
+1:31: ERROR: Start tag 'plaintext' isn't allowed here. Currently open tags: html, body, table, select.
+1:42: ERROR: Character tokens aren't legal here
+1:43: ERROR: Character tokens aren't legal here
+1:44: ERROR: Character tokens aren't legal here
+1:45: ERROR: Character tokens aren't legal here
+1:46: ERROR: Character tokens aren't legal here
+1:47: ERROR: Character tokens aren't legal here
+1:48: ERROR: Character tokens aren't legal here
+1:49: ERROR: Character tokens aren't legal here
+1:50: ERROR: Character tokens aren't legal here
+1:51: ERROR: Character tokens aren't legal here
+1:52: ERROR: Character tokens aren't legal here
+1:53: ERROR: Premature end of file. Currently open tags: html, body, table, select, plaintext.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <plaintext>
+|         "a<caption>b"
+|     <table>
+
+#data
+<!doctype html><template><plaintext>a</template>b
+#errors
+49: End of file seen and there were open elements.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <template>
+|       content
+|         <plaintext>
+|           "a</template>b"
+|   <body>
+
+#data
+<!doctype html><body></body><plaintext></plaintext>
+#errors
+39: Stray start tag “plaintext”.
+51: End of file seen and there were open elements.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <plaintext>
+|       "</plaintext>"
+
+#data
+<!doctype html><frameset><plaintext></plaintext>
+#errors
+36: Stray start tag “plaintext”.
+48: Stray end tag “plaintext”.
+48: End of file seen and there were open elements.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <frameset>
+
+#data
+<!doctype html><frameset></frameset><plaintext></plaintext>
+#errors
+47: Stray start tag “plaintext”.
+59: Stray end tag “plaintext”.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <frameset>
+
+#data
+<!doctype html><body></body></html><plaintext></plaintext>
+#errors
+46: Stray start tag “plaintext”.
+58: End of file seen and there were open elements.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <plaintext>
+|       "</plaintext>"
+
+#data
+<!doctype html><frameset></frameset></html><plaintext></plaintext>
+#errors
+54: Stray start tag “plaintext”.
+66: Stray end tag “plaintext”.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <frameset>
+
+#data
+<!doctype html><svg><plaintext>a</plaintext>b
+#errors
+45: End of file seen and there were open elements.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       <svg plaintext>
+|         "a"
+|       "b"
+
+#data
+<!doctype html><svg><title><plaintext>a</plaintext>b
+#errors
+52: End of file seen and there were open elements.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       <svg title>
+|         <plaintext>
+|           "a</plaintext>b"
+
+#data
+<!doctype html><table><tr><style></script></style>abc
+#errors
+(1,51): foster-parenting-character
+(1,52): foster-parenting-character
+(1,53): foster-parenting-character
+(1,53): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     "abc"
+|     <table>
+|       <tbody>
+|         <tr>
+|           <style>
+|             "</script>"
+
+#data
+<!doctype html><table><tr><script></style></script>abc
+#errors
+(1,52): foster-parenting-character
+(1,53): foster-parenting-character
+(1,54): foster-parenting-character
+(1,54): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     "abc"
+|     <table>
+|       <tbody>
+|         <tr>
+|           <script>
+|             "</style>"
+
+#data
+<!doctype html><table><caption><style></script></style>abc
+#errors
+(1,58): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <caption>
+|         <style>
+|           "</script>"
+|         "abc"
+
+#data
+<!doctype html><table><td><style></script></style>abc
+#errors
+(1,26): unexpected-cell-in-table-body
+(1,53): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             <style>
+|               "</script>"
+|             "abc"
+
+#data
+<!doctype html><select><script></style></script>abc
+#errors
+(1,51): eof-in-select
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <script>
+|         "</style>"
+|       "abc"
+
+#data
+<!doctype html><table><select><script></style></script>abc
+#errors
+1:23: ERROR: Start tag 'select' isn't allowed here. Currently open tags: html, body, table.
+1:56: ERROR: Character tokens aren't legal here
+1:57: ERROR: Character tokens aren't legal here
+1:58: ERROR: Character tokens aren't legal here
+1:59: ERROR: Premature end of file. Currently open tags: html, body, table, select.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <script>
+|         "</style>"
+|       "abc"
+|     <table>
+
+#data
+<!doctype html><table><tr><select><script></style></script>abc
+#errors
+1:27: ERROR: Start tag 'select' isn't allowed here. Currently open tags: html, body, table, tbody, tr.
+1:60: ERROR: Character tokens aren't legal here
+1:61: ERROR: Character tokens aren't legal here
+1:62: ERROR: Character tokens aren't legal here
+1:63: ERROR: Premature end of file. Currently open tags: html, body, table, tbody, tr, select.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <script>
+|         "</style>"
+|       "abc"
+|     <table>
+|       <tbody>
+|         <tr>
+
+#data
+<!doctype html><frameset></frameset><noframes>abc
+#errors
+(1,49): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <frameset>
+|   <noframes>
+|     "abc"
+
+#data
+<!doctype html><frameset></frameset><noframes>abc</noframes><!--abc-->
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <frameset>
+|   <noframes>
+|     "abc"
+|   <!-- abc -->
+
+#data
+<!doctype html><frameset></frameset></html><noframes>abc
+#errors
+(1,56): expected-named-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <frameset>
+|   <noframes>
+|     "abc"
+
+#data
+<!doctype html><frameset></frameset></html><noframes>abc</noframes><!--abc-->
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <frameset>
+|   <noframes>
+|     "abc"
+| <!-- abc -->
+
+#data
+<!doctype html><table><tr></tbody><tfoot>
+#errors
+(1,41): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|       <tfoot>
+
+#data
+<!doctype html><table><td><svg></svg>abc<td>
+#errors
+(1,26): unexpected-cell-in-table-body
+(1,44): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             <svg svg>
+|             "abc"
+|           <td>
diff --git a/tests/data/tree-construction/tests19.dat b/tests/data/tree-construction/tests19.dat
new file mode 100644
index 00000000..20cdeabc
--- /dev/null
+++ b/tests/data/tree-construction/tests19.dat
@@ -0,0 +1,1398 @@
+#data
+<!doctype html><math><mn DefinitionUrl="foo">
+#errors
+(1,45): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math mn>
+|         definitionURL="foo"
+
+#data
+<!doctype html><html></p><!--foo-->
+#errors
+(1,25): end-tag-after-implied-root
+#document
+| <!DOCTYPE html>
+| <html>
+|   <!-- foo -->
+|   <head>
+|   <body>
+
+#data
+<!doctype html><head></head></p><!--foo-->
+#errors
+(1,32): unexpected-end-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <!-- foo -->
+|   <body>
+
+#data
+<!doctype html><body><p><pre>
+#errors
+(1,29): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|     <pre>
+
+#data
+<!doctype html><body><p><listing>
+#errors
+(1,33): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|     <listing>
+
+#data
+<!doctype html><p><plaintext>
+#errors
+(1,29): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|     <plaintext>
+
+#data
+<!doctype html><p><h1>
+#errors
+(1,22): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|     <h1>
+
+#data
+<!doctype html><isindex type="hidden">
+#errors
+(1,38): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <isindex>
+|       type="hidden"
+
+#data
+<!doctype html><ruby><p><rp>
+#errors
+(1,28): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <ruby>
+|       <p>
+|       <rp>
+
+#data
+<!doctype html><ruby><div><span><rp>
+#errors
+(1,36): XXX-undefined-error
+(1,36): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <ruby>
+|       <div>
+|         <span>
+|           <rp>
+
+#data
+<!doctype html><ruby><div><p><rp>
+#errors
+(1,33): XXX-undefined-error
+(1,33): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <ruby>
+|       <div>
+|         <p>
+|         <rp>
+
+#data
+<!doctype html><ruby><p><rt>
+#errors
+(1,28): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <ruby>
+|       <p>
+|       <rt>
+
+#data
+<!doctype html><ruby><div><span><rt>
+#errors
+(1,36): XXX-undefined-error
+(1,36): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <ruby>
+|       <div>
+|         <span>
+|           <rt>
+
+#data
+<!doctype html><ruby><div><p><rt>
+#errors
+(1,33): XXX-undefined-error
+(1,33): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <ruby>
+|       <div>
+|         <p>
+|         <rt>
+
+#data
+<html><ruby>a<rb>b<rt></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <ruby>
+|       "a"
+|       <rb>
+|         "b"
+|       <rt>
+
+#data
+<html><ruby>a<rp>b<rt></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <ruby>
+|       "a"
+|       <rp>
+|         "b"
+|       <rt>
+
+#data
+<html><ruby>a<rt>b<rt></ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <ruby>
+|       "a"
+|       <rt>
+|         "b"
+|       <rt>
+
+#data
+<html><ruby>a<rtc>b<rt>c<rb>d</ruby></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <ruby>
+|       "a"
+|       <rtc>
+|         "b"
+|         <rt>
+|           "c"
+|       <rb>
+|         "d"
+
+#data
+<!doctype html><math/><foo>
+#errors
+(1,27): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|     <foo>
+
+#data
+<!doctype html><svg/><foo>
+#errors
+(1,26): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|     <foo>
+
+#data
+<!doctype html><div></body><!--foo-->
+#errors
+(1,27): expected-one-end-tag-but-got-another
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|   <!-- foo -->
+
+#data
+<!doctype html><h1><div><h3><span></h1>foo
+#errors
+(1,39): end-tag-too-early
+(1,42): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <h1>
+|       <div>
+|         <h3>
+|           <span>
+|         "foo"
+
+#data
+<!doctype html><p></h3>foo
+#errors
+(1,23): end-tag-too-early
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       "foo"
+
+#data
+<!doctype html><h3><li>abc</h2>foo
+#errors
+(1,31): end-tag-too-early
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <h3>
+|       <li>
+|         "abc"
+|     "foo"
+
+#data
+<!doctype html><table>abc<!--foo-->
+#errors
+(1,23): foster-parenting-character
+(1,24): foster-parenting-character
+(1,25): foster-parenting-character
+(1,35): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     "abc"
+|     <table>
+|       <!-- foo -->
+
+#data
+<!doctype html><table>  <!--foo-->
+#errors
+(1,34): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       "  "
+|       <!-- foo -->
+
+#data
+<!doctype html><table> b <!--foo-->
+#errors
+(1,23): foster-parenting-character
+(1,24): foster-parenting-character
+(1,25): foster-parenting-character
+(1,35): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     " b "
+|     <table>
+|       <!-- foo -->
+
+#data
+<!doctype html><select><option><option>
+#errors
+(1,39): eof-in-select
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <option>
+|       <option>
+
+#data
+<!doctype html><select><option></optgroup>
+#errors
+(1,42): unexpected-end-tag-in-select
+(1,42): eof-in-select
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <option>
+
+#data
+<!doctype html><dd><optgroup><dd>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <dd>
+|       <optgroup>
+|     <dd>
+
+#data
+<!doctype html><p><math><mi><p><h1>
+#errors
+(1,35): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <math math>
+|         <math mi>
+|           <p>
+|           <h1>
+
+#data
+<!doctype html><p><math><mo><p><h1>
+#errors
+(1,35): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <math math>
+|         <math mo>
+|           <p>
+|           <h1>
+
+#data
+<!doctype html><p><math><mn><p><h1>
+#errors
+(1,35): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <math math>
+|         <math mn>
+|           <p>
+|           <h1>
+
+#data
+<!doctype html><p><math><ms><p><h1>
+#errors
+(1,35): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <math math>
+|         <math ms>
+|           <p>
+|           <h1>
+
+#data
+<!doctype html><p><math><mtext><p><h1>
+#errors
+(1,38): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <math math>
+|         <math mtext>
+|           <p>
+|           <h1>
+
+#data
+<!doctype html><frameset></noframes>
+#errors
+(1,36): unexpected-end-tag-in-frameset
+(1,36): eof-in-frameset
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <frameset>
+
+#data
+<!doctype html><html c=d><body></html><html a=b>
+#errors
+(1,48): non-html-root
+#document
+| <!DOCTYPE html>
+| <html>
+|   a="b"
+|   c="d"
+|   <head>
+|   <body>
+
+#data
+<!doctype html><html c=d><frameset></frameset></html><html a=b>
+#errors
+(1,63): non-html-root
+#document
+| <!DOCTYPE html>
+| <html>
+|   a="b"
+|   c="d"
+|   <head>
+|   <frameset>
+
+#data
+<!doctype html><html><frameset></frameset></html><!--foo-->
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <frameset>
+| <!-- foo -->
+
+#data
+<!doctype html><html><frameset></frameset></html>  
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <frameset>
+|   "  "
+
+#data
+<!doctype html><html><frameset></frameset></html>abc
+#errors
+(1,50): expected-eof-but-got-char
+(1,51): expected-eof-but-got-char
+(1,52): expected-eof-but-got-char
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <frameset>
+
+#data
+<!doctype html><html><frameset></frameset></html><p>
+#errors
+(1,52): expected-eof-but-got-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <frameset>
+
+#data
+<!doctype html><html><frameset></frameset></html></p>
+#errors
+(1,53): expected-eof-but-got-end-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <frameset>
+
+#data
+<html><frameset></frameset></html><!doctype html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,49): unexpected-doctype
+#document
+| <html>
+|   <head>
+|   <frameset>
+
+#data
+<!doctype html><body><frameset>
+#errors
+(1,31): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+
+#data
+<!doctype html><p><frameset><frame>
+#errors
+(1,28): unexpected-start-tag
+(1,35): eof-in-frameset
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <frameset>
+|     <frame>
+
+#data
+<!doctype html><p>a<frameset>
+#errors
+(1,29): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       "a"
+
+#data
+<!doctype html><p> <frameset><frame>
+#errors
+(1,29): unexpected-start-tag
+(1,36): eof-in-frameset
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <frameset>
+|     <frame>
+
+#data
+<!doctype html><pre><frameset>
+#errors
+(1,30): unexpected-start-tag
+(1,30): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <pre>
+
+#data
+<!doctype html><listing><frameset>
+#errors
+(1,34): unexpected-start-tag
+(1,34): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <listing>
+
+#data
+<!doctype html><li><frameset>
+#errors
+(1,29): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <li>
+
+#data
+<!doctype html><dd><frameset>
+#errors
+(1,29): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <dd>
+
+#data
+<!doctype html><dt><frameset>
+#errors
+(1,29): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <dt>
+
+#data
+<!doctype html><button><frameset>
+#errors
+(1,33): unexpected-start-tag
+(1,33): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <button>
+
+#data
+<!doctype html><applet><frameset>
+#errors
+(1,33): unexpected-start-tag
+(1,33): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <applet>
+
+#data
+<!doctype html><marquee><frameset>
+#errors
+(1,34): unexpected-start-tag
+(1,34): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <marquee>
+
+#data
+<!doctype html><object><frameset>
+#errors
+(1,33): unexpected-start-tag
+(1,33): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <object>
+
+#data
+<!doctype html><table><frameset>
+#errors
+(1,32): unexpected-start-tag-implies-table-voodoo
+(1,32): unexpected-start-tag
+(1,32): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+
+#data
+<!doctype html><area><frameset>
+#errors
+(1,31): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <area>
+
+#data
+<!doctype html><basefont><frameset>
+#errors
+(1,35): eof-in-frameset
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <basefont>
+|   <frameset>
+
+#data
+<!doctype html><bgsound><frameset>
+#errors
+(1,34): eof-in-frameset
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <bgsound>
+|   <frameset>
+
+#data
+<!doctype html><br><frameset>
+#errors
+(1,29): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <br>
+
+#data
+<!doctype html><embed><frameset>
+#errors
+(1,32): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <embed>
+
+#data
+<!doctype html><img><frameset>
+#errors
+(1,30): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <img>
+
+#data
+<!doctype html><input><frameset>
+#errors
+(1,32): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <input>
+
+#data
+<!doctype html><keygen><frameset>
+#errors
+(1,33): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <keygen>
+
+#data
+<!doctype html><wbr><frameset>
+#errors
+(1,30): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <wbr>
+
+#data
+<!doctype html><hr><frameset>
+#errors
+(1,29): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <hr>
+
+#data
+<!doctype html><textarea></textarea><frameset>
+#errors
+(1,46): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <textarea>
+
+#data
+<!doctype html><xmp></xmp><frameset>
+#errors
+(1,36): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <xmp>
+
+#data
+<!doctype html><iframe></iframe><frameset>
+#errors
+(1,42): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <iframe>
+
+#data
+<!doctype html><select></select><frameset>
+#errors
+(1,42): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <select>
+
+#data
+<!doctype html><svg></svg><frameset><frame>
+#errors
+(1,36): unexpected-start-tag
+(1,43): eof-in-frameset
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <frameset>
+|     <frame>
+
+#data
+<!doctype html><math></math><frameset><frame>
+#errors
+(1,38): unexpected-start-tag
+(1,45): eof-in-frameset
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <frameset>
+|     <frame>
+
+#data
+<!doctype html><svg><foreignObject><div> <frameset><frame>
+#errors
+(1,51): unexpected-start-tag
+(1,58): eof-in-frameset
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <frameset>
+|     <frame>
+
+#data
+<!doctype html><svg>a</svg><frameset><frame>
+#errors
+(1,37): unexpected-start-tag
+(1,44): unexpected-start-tag-ignored
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       "a"
+
+#data
+<!doctype html><svg> </svg><frameset><frame>
+#errors
+(1,37): unexpected-start-tag
+(1,44): eof-in-frameset
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <frameset>
+|     <frame>
+
+#data
+<html>aaa<frameset></frameset>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,19): unexpected-start-tag
+(1,30): unexpected-end-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     "aaa"
+
+#data
+<html> a <frameset></frameset>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,19): unexpected-start-tag
+(1,30): unexpected-end-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     "a "
+
+#data
+<!doctype html><div><frameset>
+#errors
+(1,30): unexpected-start-tag
+(1,30): eof-in-frameset
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <frameset>
+
+#data
+<!doctype html><div><body><frameset>
+#errors
+(1,26): unexpected-start-tag
+(1,36): unexpected-start-tag
+(1,36): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <div>
+
+#data
+<!doctype html><p><math></p>a
+#errors
+(1,28): unexpected-end-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <math math>
+|     "a"
+
+#data
+<!doctype html><p><math><mn><span></p>a
+#errors
+(1,38): unexpected-end-tag
+(1,39): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <math math>
+|         <math mn>
+|           <span>
+|             <p>
+|             "a"
+
+#data
+<!doctype html><math></html>
+#errors
+(1,28): unexpected-end-tag
+(1,28): expected-one-end-tag-but-got-another
+(1,28): unexpected-end-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+
+#data
+<!doctype html><meta charset="ascii">
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <meta>
+|       charset="ascii"
+|   <body>
+
+#data
+<!doctype html><meta http-equiv="content-type" content="text/html;charset=ascii">
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <meta>
+|       content="text/html;charset=ascii"
+|       http-equiv="content-type"
+|   <body>
+
+#data
+<!doctype html><head><!--aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa--><meta charset="utf8">
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <!-- aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa -->
+|     <meta>
+|       charset="utf8"
+|   <body>
+
+#data
+<!doctype html><html a=b><head></head><html c=d>
+#errors
+(1,48): non-html-root
+#document
+| <!DOCTYPE html>
+| <html>
+|   a="b"
+|   c="d"
+|   <head>
+|   <body>
+
+#data
+<!doctype html><image/>
+#errors
+(1,23): image-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <img>
+
+#data
+<!doctype html>a<i>b<table>c<b>d</i>e</b>f
+#errors
+(1,28): foster-parenting-character
+(1,31): foster-parenting-start-tag
+(1,32): foster-parenting-character
+(1,36): foster-parenting-end-tag
+(1,36): adoption-agency-1.3
+(1,37): foster-parenting-character
+(1,41): foster-parenting-end-tag
+(1,42): foster-parenting-character
+(1,42): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     "a"
+|     <i>
+|       "bc"
+|       <b>
+|         "de"
+|       "f"
+|       <table>
+
+#data
+<!doctype html><table><i>a<b>b<div>c<a>d</i>e</b>f
+#errors
+(1,25): foster-parenting-start-tag
+(1,26): foster-parenting-character
+(1,29): foster-parenting-start-tag
+(1,30): foster-parenting-character
+(1,35): foster-parenting-start-tag
+(1,36): foster-parenting-character
+(1,39): foster-parenting-start-tag
+(1,40): foster-parenting-character
+(1,44): foster-parenting-end-tag
+(1,44): adoption-agency-1.3
+(1,44): adoption-agency-1.3
+(1,45): foster-parenting-character
+(1,49): foster-parenting-end-tag
+(1,49): adoption-agency-1.3
+(1,49): adoption-agency-1.3
+(1,50): foster-parenting-character
+(1,50): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <i>
+|       "a"
+|       <b>
+|         "b"
+|     <b>
+|     <div>
+|       <b>
+|         <i>
+|           "c"
+|           <a>
+|             "d"
+|         <a>
+|           "e"
+|       <a>
+|         "f"
+|     <table>
+
+#data
+<!doctype html><i>a<b>b<div>c<a>d</i>e</b>f
+#errors
+(1,37): adoption-agency-1.3
+(1,37): adoption-agency-1.3
+(1,42): adoption-agency-1.3
+(1,42): adoption-agency-1.3
+(1,43): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <i>
+|       "a"
+|       <b>
+|         "b"
+|     <b>
+|     <div>
+|       <b>
+|         <i>
+|           "c"
+|           <a>
+|             "d"
+|         <a>
+|           "e"
+|       <a>
+|         "f"
+
+#data
+<!doctype html><table><i>a<b>b<div>c</i>
+#errors
+(1,25): foster-parenting-start-tag
+(1,26): foster-parenting-character
+(1,29): foster-parenting-start-tag
+(1,30): foster-parenting-character
+(1,35): foster-parenting-start-tag
+(1,36): foster-parenting-character
+(1,40): foster-parenting-end-tag
+(1,40): adoption-agency-1.3
+(1,40): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <i>
+|       "a"
+|       <b>
+|         "b"
+|     <b>
+|       <div>
+|         <i>
+|           "c"
+|     <table>
+
+#data
+<!doctype html><table><i>a<div>b<tr>c<b>d</i>e
+#errors
+(1,25): foster-parenting-start-tag
+(1,26): foster-parenting-character
+(1,31): foster-parenting-start-tag
+(1,32): foster-parenting-character
+(1,37): foster-parenting-character
+(1,40): foster-parenting-start-tag
+(1,41): foster-parenting-character
+(1,45): foster-parenting-end-tag
+(1,45): adoption-agency-1.3
+(1,46): foster-parenting-character
+(1,46): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <i>
+|       "a"
+|       <div>
+|         "b"
+|     <i>
+|       "c"
+|       <b>
+|         "d"
+|     <b>
+|       "e"
+|     <table>
+|       <tbody>
+|         <tr>
+
+#data
+<!doctype html><table><td><table><i>a<div>b<b>c</i>d
+#errors
+(1,26): unexpected-cell-in-table-body
+(1,36): foster-parenting-start-tag
+(1,37): foster-parenting-character
+(1,42): foster-parenting-start-tag
+(1,43): foster-parenting-character
+(1,46): foster-parenting-start-tag
+(1,47): foster-parenting-character
+(1,51): foster-parenting-end-tag
+(1,51): adoption-agency-1.3
+(1,51): adoption-agency-1.3
+(1,52): foster-parenting-character
+(1,52): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             <i>
+|               "a"
+|             <div>
+|               <i>
+|                 "b"
+|                 <b>
+|                   "c"
+|               <b>
+|                 "d"
+|             <table>
+
+#data
+<!doctype html><body><bgsound>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <bgsound>
+
+#data
+<!doctype html><body><basefont>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <basefont>
+
+#data
+<!doctype html><a><b></a><basefont>
+#errors
+(1,25): adoption-agency-1.3
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <a>
+|       <b>
+|     <basefont>
+
+#data
+<!doctype html><a><b></a><bgsound>
+#errors
+(1,25): adoption-agency-1.3
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <a>
+|       <b>
+|     <bgsound>
+
+#data
+<!doctype html><figcaption><article></figcaption>a
+#errors
+(1,49): end-tag-too-early
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <figcaption>
+|       <article>
+|     "a"
+
+#data
+<!doctype html><summary><article></summary>a
+#errors
+(1,43): end-tag-too-early
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <summary>
+|       <article>
+|     "a"
+
+#data
+<!doctype html><p><a><plaintext>b
+#errors
+(1,32): unexpected-end-tag
+(1,33): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <a>
+|     <plaintext>
+|       <a>
+|         "b"
+
+#data
+<!DOCTYPE html><div>a<a></div>b<p>c</p>d
+#errors
+(1,30): end-tag-too-early
+(1,40): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       "a"
+|       <a>
+|     <a>
+|       "b"
+|       <p>
+|         "c"
+|       "d"
diff --git a/tests/data/tree-construction/tests2.dat b/tests/data/tree-construction/tests2.dat
new file mode 100644
index 00000000..9232edde
--- /dev/null
+++ b/tests/data/tree-construction/tests2.dat
@@ -0,0 +1,831 @@
+#data
+<!DOCTYPE html>Test
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     "Test"
+
+#data
+<textarea>test</div>test
+#errors
+(1,10): expected-doctype-but-got-start-tag
+(1,24): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <textarea>
+|       "test</div>test"
+
+#data
+<table><td>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,11): unexpected-cell-in-table-body
+(1,11): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+
+#data
+<table><td>test</tbody></table>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,11): unexpected-cell-in-table-body
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             "test"
+
+#data
+<frame>test
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,7): unexpected-start-tag-ignored
+#document
+| <html>
+|   <head>
+|   <body>
+|     "test"
+
+#data
+<!DOCTYPE html><frameset>test
+#errors
+(1,29): unexpected-char-in-frameset
+(1,29): unexpected-char-in-frameset
+(1,29): unexpected-char-in-frameset
+(1,29): unexpected-char-in-frameset
+(1,29): eof-in-frameset
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <frameset>
+
+#data
+<!DOCTYPE html><frameset> te st
+#errors
+(1,29): unexpected-char-in-frameset
+(1,29): unexpected-char-in-frameset
+(1,29): unexpected-char-in-frameset
+(1,29): unexpected-char-in-frameset
+(1,29): eof-in-frameset
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <frameset>
+|     "  "
+
+#data
+<!DOCTYPE html><frameset></frameset> te st
+#errors
+(1,29): unexpected-char-after-frameset
+(1,29): unexpected-char-after-frameset
+(1,29): unexpected-char-after-frameset
+(1,29): unexpected-char-after-frameset
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <frameset>
+|   "  "
+
+#data
+<!DOCTYPE html><frameset><!DOCTYPE html>
+#errors
+(1,40): unexpected-doctype
+(1,40): eof-in-frameset
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <frameset>
+
+#data
+<!DOCTYPE html><font><p><b>test</font>
+#errors
+(1,38): adoption-agency-1.3
+(1,38): adoption-agency-1.3
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <font>
+|     <p>
+|       <font>
+|         <b>
+|           "test"
+
+#data
+<!DOCTYPE html><dt><div><dd>
+#errors
+(1,28): end-tag-too-early
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <dt>
+|       <div>
+|     <dd>
+
+#data
+<script></x
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,11): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|     <script>
+|       "</x"
+|   <body>
+
+#data
+<table><plaintext><td>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,18): unexpected-start-tag-implies-table-voodoo
+(1,22): foster-parenting-character-in-table
+(1,22): foster-parenting-character-in-table
+(1,22): foster-parenting-character-in-table
+(1,22): foster-parenting-character-in-table
+(1,22): eof-in-table
+#document
+| <html>
+|   <head>
+|   <body>
+|     <plaintext>
+|       "<td>"
+|     <table>
+
+#data
+<plaintext></plaintext>
+#errors
+(1,11): expected-doctype-but-got-start-tag
+(1,23): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <plaintext>
+|       "</plaintext>"
+
+#data
+<!DOCTYPE html><table><tr>TEST
+#errors
+(1,30): foster-parenting-character-in-table
+(1,30): foster-parenting-character-in-table
+(1,30): foster-parenting-character-in-table
+(1,30): foster-parenting-character-in-table
+(1,30): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     "TEST"
+|     <table>
+|       <tbody>
+|         <tr>
+
+#data
+<!DOCTYPE html><body t1=1><body t2=2><body t3=3 t4=4>
+#errors
+(1,37): unexpected-start-tag
+(1,53): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     t1="1"
+|     t2="2"
+|     t3="3"
+|     t4="4"
+
+#data
+</b test
+#errors
+(1,8): eof-in-attribute-name
+(1,8): expected-doctype-but-got-eof
+#new-errors
+(1:9) eof-in-tag
+#document
+| <html>
+|   <head>
+|   <body>
+
+#data
+<!DOCTYPE html></b test<b &=&amp>X
+#errors
+(1,24): invalid-character-in-attribute-name
+(1,32): named-entity-without-semicolon
+(1,33): attributes-in-end-tag
+(1,33): unexpected-end-tag-before-html
+#new-errors
+(1:24) unexpected-character-in-attribute-name
+(1:33) missing-semicolon-after-character-reference
+(1:33) end-tag-with-attributes
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     "X"
+
+#data
+<!doctypehtml><scrIPt type=text/x-foobar;baz>X</SCRipt
+#errors
+(1,9): need-space-after-doctype
+(1,54): expected-named-closing-tag-but-got-eof
+#new-errors
+(1:10) missing-whitespace-before-doctype-name
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       type="text/x-foobar;baz"
+|       "X</SCRipt"
+|   <body>
+
+#data
+&
+#errors
+(1,1): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "&"
+
+#data
+&#
+#errors
+(1,2): expected-numeric-entity
+(1,2): expected-doctype-but-got-chars
+#new-errors
+(1:3) absence-of-digits-in-numeric-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "&#"
+
+#data
+&#X
+#errors
+(1,3): expected-numeric-entity
+(1,3): expected-doctype-but-got-chars
+#new-errors
+(1:4) absence-of-digits-in-numeric-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "&#X"
+
+#data
+&#x
+#errors
+(1,3): expected-numeric-entity
+(1,3): expected-doctype-but-got-chars
+#new-errors
+(1:4) absence-of-digits-in-numeric-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "&#x"
+
+#data
+&#45
+#errors
+(1,4): numeric-entity-without-semicolon
+(1,4): expected-doctype-but-got-chars
+#new-errors
+(1:5) missing-semicolon-after-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "-"
+
+#data
+&x-test
+#errors
+(1,2): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "&x-test"
+
+#data
+<!doctypehtml><p><li>
+#errors
+(1,9): need-space-after-doctype
+#new-errors
+(1:10) missing-whitespace-before-doctype-name
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|     <li>
+
+#data
+<!doctypehtml><p><dt>
+#errors
+(1,9): need-space-after-doctype
+#new-errors
+(1:10) missing-whitespace-before-doctype-name
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|     <dt>
+
+#data
+<!doctypehtml><p><dd>
+#errors
+(1,9): need-space-after-doctype
+#new-errors
+(1:10) missing-whitespace-before-doctype-name
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|     <dd>
+
+#data
+<!doctypehtml><p><form>
+#errors
+(1,9): need-space-after-doctype
+(1,23): expected-closing-tag-but-got-eof
+#new-errors
+(1:10) missing-whitespace-before-doctype-name
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|     <form>
+
+#data
+<!DOCTYPE html><p></P>X
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|     "X"
+
+#data
+&AMP
+#errors
+(1,4): named-entity-without-semicolon
+(1,4): expected-doctype-but-got-chars
+#new-errors
+(1:5) missing-semicolon-after-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "&"
+
+#data
+&AMp;
+#errors
+(1,3): expected-named-entity
+(1,3): expected-doctype-but-got-chars
+#new-errors
+(1:5) unknown-named-character-reference
+#document
+| <html>
+|   <head>
+|   <body>
+|     "&AMp;"
+
+#data
+<!DOCTYPE html><html><head></head><body><thisISasillyTESTelementNameToMakeSureCrazyTagNamesArePARSEDcorrectLY>
+#errors
+(1,110): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <thisisasillytestelementnametomakesurecrazytagnamesareparsedcorrectly>
+
+#data
+<!DOCTYPE html>X</body>X
+#errors
+(1,24): unexpected-char-after-body
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     "XX"
+
+#data
+<!DOCTYPE html><!-- X
+#errors
+(1,21): eof-in-comment
+#new-errors
+(1:22) eof-in-comment
+#document
+| <!DOCTYPE html>
+| <!--  X -->
+| <html>
+|   <head>
+|   <body>
+
+#data
+<!DOCTYPE html><table><caption>test TEST</caption><td>test
+#errors
+(1,54): unexpected-cell-in-table-body
+(1,58): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <caption>
+|         "test TEST"
+|       <tbody>
+|         <tr>
+|           <td>
+|             "test"
+
+#data
+<!DOCTYPE html><select><option><optgroup>
+#errors
+(1,41): eof-in-select
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <option>
+|       <optgroup>
+
+#data
+<!DOCTYPE html><select><optgroup><option></optgroup><option><select><option>
+#errors
+1:61: ERROR: Start tag 'select' isn't allowed here. Currently open tags: html, body, select, option.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <optgroup>
+|         <option>
+|       <option>
+|     <option>
+
+#data
+<!DOCTYPE html><select><optgroup><option><optgroup>
+#errors
+(1,51): eof-in-select
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <optgroup>
+|         <option>
+|       <optgroup>
+
+#data
+<!DOCTYPE html><datalist><option>foo</datalist>bar
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <datalist>
+|       <option>
+|         "foo"
+|     "bar"
+
+#data
+<!DOCTYPE html><font><input><input></font>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <font>
+|       <input>
+|       <input>
+
+#data
+<!DOCTYPE html><!-- XXX - XXX -->
+#errors
+#document
+| <!DOCTYPE html>
+| <!--  XXX - XXX  -->
+| <html>
+|   <head>
+|   <body>
+
+#data
+<!DOCTYPE html><!-- XXX - XXX
+#errors
+(1,29): eof-in-comment
+#new-errors
+(1:30) eof-in-comment
+#document
+| <!DOCTYPE html>
+| <!--  XXX - XXX -->
+| <html>
+|   <head>
+|   <body>
+
+#data
+<!DOCTYPE html><!-- XXX - XXX - XXX -->
+#errors
+#document
+| <!DOCTYPE html>
+| <!--  XXX - XXX - XXX  -->
+| <html>
+|   <head>
+|   <body>
+
+#data
+<!DOCTYPE html> <!DOCTYPE html>
+#errors
+Line: 1 Col: 31 Unexpected DOCTYPE. Ignored.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+
+#data
+test
+test
+#errors
+(2,4): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "test
+test"
+
+#data
+<!DOCTYPE html><body><title>test</body></title>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <title>
+|       "test</body>"
+
+#data
+<!DOCTYPE html><body><title>X</title><meta name=z><link rel=foo><style>
+x { content:"</style" } </style>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <title>
+|       "X"
+|     <meta>
+|       name="z"
+|     <link>
+|       rel="foo"
+|     <style>
+|       "
+x { content:"</style" } "
+
+#data
+<!DOCTYPE html><select><optgroup></optgroup></select>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <optgroup>
+
+#data
+ 
+ 
+#errors
+(2,1): expected-doctype-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+
+#data
+<!DOCTYPE html>  <html>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+
+#data
+<!DOCTYPE html><script>
+</script>  <title>x</title>  </head>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <script>
+|       "
+"
+|     "  "
+|     <title>
+|       "x"
+|     "  "
+|   <body>
+
+#data
+<!DOCTYPE html><html><body><html id=x>
+#errors
+(1,38): non-html-root
+#document
+| <!DOCTYPE html>
+| <html>
+|   id="x"
+|   <head>
+|   <body>
+
+#data
+<!DOCTYPE html>X</body><html id="x">
+#errors
+(1,36): non-html-root
+#document
+| <!DOCTYPE html>
+| <html>
+|   id="x"
+|   <head>
+|   <body>
+|     "X"
+
+#data
+<!DOCTYPE html><head><html id=x>
+#errors
+(1,32): non-html-root
+#document
+| <!DOCTYPE html>
+| <html>
+|   id="x"
+|   <head>
+|   <body>
+
+#data
+<!DOCTYPE html>X</html>X
+#errors
+(1,24): expected-eof-but-got-char
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     "XX"
+
+#data
+<!DOCTYPE html>X</html> 
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     "X "
+
+#data
+<!DOCTYPE html>X</html><p>X
+#errors
+(1,26): expected-eof-but-got-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     "X"
+|     <p>
+|       "X"
+
+#data
+<!DOCTYPE html>X<p/x/y/z>
+#errors
+(1,19): unexpected-character-after-solidus-in-tag
+(1,21): unexpected-character-after-solidus-in-tag
+(1,23): unexpected-character-after-solidus-in-tag
+#new-errors
+(1:20) unexpected-solidus-in-tag
+(1:22) unexpected-solidus-in-tag
+(1:24) unexpected-solidus-in-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     "X"
+|     <p>
+|       x=""
+|       y=""
+|       z=""
+
+#data
+<!DOCTYPE html><!--x--
+#errors
+(1,22): eof-in-comment-double-dash
+#new-errors
+(1:23) eof-in-comment
+#document
+| <!DOCTYPE html>
+| <!-- x -->
+| <html>
+|   <head>
+|   <body>
+
+#data
+<!DOCTYPE html><table><tr><td></p></table>
+#errors
+(1,34): unexpected-end-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             <p>
+
+#data
+<!DOCTYPE <!DOCTYPE HTML>><!--<!--x-->-->
+#errors
+(1,20): expected-space-or-right-bracket-in-doctype
+(1,25): unknown-doctype
+(1,35): unexpected-char-in-comment
+#new-errors
+(1:21) invalid-character-sequence-after-doctype-name
+(1:35) nested-comment
+#document
+| <!DOCTYPE <!doctype>
+| <html>
+|   <head>
+|   <body>
+|     ">"
+|     <!-- <!--x -->
+|     "-->"
+
+#data
+<!doctype html><div><form></form><div></div></div>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       <form>
+|       <div>
diff --git a/tests/data/tree-construction/tests20.dat b/tests/data/tree-construction/tests20.dat
new file mode 100644
index 00000000..80c57d1a
--- /dev/null
+++ b/tests/data/tree-construction/tests20.dat
@@ -0,0 +1,842 @@
+#data
+<!doctype html><p><button><button>
+#errors
+(1,34): unexpected-start-tag-implies-end-tag
+(1,34): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|       <button>
+
+#data
+<!doctype html><p><button><address>
+#errors
+(1,35): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <address>
+
+#data
+<!doctype html><p><button><article>
+#errors
+(1,36): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <article>
+
+#data
+<!doctype html><p><button><aside>
+#errors
+(1,34): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <aside>
+
+#data
+<!doctype html><p><button><blockquote>
+#errors
+(1,38): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <blockquote>
+
+#data
+<!doctype html><p><button><center>
+#errors
+(1,35): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <center>
+
+#data
+<!doctype html><p><button><details>
+#errors
+(1,36): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <details>
+
+#data
+<!doctype html><p><button><dialog>
+#errors
+(1,35): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <dialog>
+
+#data
+<!doctype html><p><button><dir>
+#errors
+(1,32): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <dir>
+
+#data
+<!doctype html><p><button><div>
+#errors
+(1,32): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <div>
+
+#data
+<!doctype html><p><button><dl>
+#errors
+(1,31): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <dl>
+
+#data
+<!doctype html><p><button><fieldset>
+#errors
+(1,37): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <fieldset>
+
+#data
+<!doctype html><p><button><figcaption>
+#errors
+(1,39): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <figcaption>
+
+#data
+<!doctype html><p><button><figure>
+#errors
+(1,35): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <figure>
+
+#data
+<!doctype html><p><button><footer>
+#errors
+(1,35): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <footer>
+
+#data
+<!doctype html><p><button><header>
+#errors
+(1,35): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <header>
+
+#data
+<!doctype html><p><button><hgroup>
+#errors
+(1,35): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <hgroup>
+
+#data
+<!doctype html><p><button><main>
+#errors
+(1,33): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <main>
+
+#data
+<!doctype html><p><button><menu>
+#errors
+(1,32): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <menu>
+
+#data
+<!doctype html><p><button><nav>
+#errors
+(1,32): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <nav>
+
+#data
+<!doctype html><p><button><ol>
+#errors
+(1,31): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <ol>
+
+#data
+<!doctype html><p><button><p>
+#errors
+(1,29): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <p>
+
+#data
+<!doctype html><p><button><search>
+#errors
+(1,35): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <search>
+
+#data
+<!doctype html><p><button><section>
+#errors
+(1,36): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <section>
+
+#data
+<!doctype html><p><button><summary>
+#errors
+(1,36): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <summary>
+
+#data
+<!doctype html><p><button><ul>
+#errors
+(1,30): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <ul>
+
+#data
+<!doctype html><p><button><h1>
+#errors
+(1,30): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <h1>
+
+#data
+<!doctype html><p><button><h6>
+#errors
+(1,30): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <h6>
+
+#data
+<!doctype html><p><button><listing>
+#errors
+(1,35): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <listing>
+
+#data
+<!doctype html><p><button><pre>
+#errors
+(1,31): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <pre>
+
+#data
+<!doctype html><p><button><form>
+#errors
+(1,32): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <form>
+
+#data
+<!doctype html><p><button><li>
+#errors
+(1,30): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <li>
+
+#data
+<!doctype html><p><button><dd>
+#errors
+(1,30): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <dd>
+
+#data
+<!doctype html><p><button><dt>
+#errors
+(1,30): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <dt>
+
+#data
+<!doctype html><p><button><plaintext>
+#errors
+(1,37): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <plaintext>
+
+#data
+<!doctype html><p><button><table>
+#errors
+(1,33): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <table>
+
+#data
+<!doctype html><p><button><hr>
+#errors
+(1,30): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <hr>
+
+#data
+<!doctype html><p><button><xmp>
+#errors
+(1,31): expected-named-closing-tag-but-got-eof
+(1,31): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <xmp>
+
+#data
+<!doctype html><p><button></p>
+#errors
+(1,30): unexpected-end-tag
+(1,30): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <button>
+|         <p>
+
+#data
+<!doctype html><button><p></button>x
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <button>
+|       <p>
+|     "x"
+
+#data
+<!doctype html><address><button></address>a
+#errors
+(1,42): end-tag-too-early
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <address>
+|       <button>
+|     "a"
+
+#data
+<p><table></p>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,14): unexpected-end-tag-implies-table-voodoo
+(1,14): unexpected-end-tag
+(1,14): eof-in-table
+#document
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <p>
+|       <table>
+
+#data
+<!doctype html><svg>
+#errors
+(1,20): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+
+#data
+<!doctype html><p><figcaption>
+#errors
+(1,30): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|     <figcaption>
+
+#data
+<!doctype html><p><summary>
+#errors
+(1,27): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|     <summary>
+
+#data
+<!doctype html><form><table><form>
+#errors
+(1,34): unexpected-form-in-table
+(1,34): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <form>
+|       <table>
+
+#data
+<!doctype html><table><form><form>
+#errors
+(1,28): unexpected-form-in-table
+(1,34): unexpected-form-in-table
+(1,34): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <form>
+
+#data
+<!doctype html><table><form></table><form>
+#errors
+(1,28): unexpected-form-in-table
+(1,42): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <form>
+
+#data
+<!doctype html><svg><foreignObject><p>
+#errors
+(1,38): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       <svg foreignObject>
+|         <p>
+
+#data
+<!doctype html><svg><title>abc
+#errors
+(1,30): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       <svg title>
+|         "abc"
+
+#data
+<option><span><option>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,22): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <option>
+|       <span>
+|         <option>
+
+#data
+<option><option>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <option>
+|     <option>
+
+#data
+<math><annotation-xml><div>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,27): unexpected-html-element-in-foreign-content
+(1,27): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math annotation-xml>
+|     <div>
+
+#data
+<math><annotation-xml encoding="application/svg+xml"><div>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,58): unexpected-html-element-in-foreign-content
+(1,58): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math annotation-xml>
+|         encoding="application/svg+xml"
+|     <div>
+
+#data
+<math><annotation-xml encoding="application/xhtml+xml"><div>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,60): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math annotation-xml>
+|         encoding="application/xhtml+xml"
+|         <div>
+
+#data
+<math><annotation-xml encoding="aPPlication/xhtmL+xMl"><div>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,60): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math annotation-xml>
+|         encoding="aPPlication/xhtmL+xMl"
+|         <div>
+
+#data
+<math><annotation-xml encoding="text/html"><div>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,48): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math annotation-xml>
+|         encoding="text/html"
+|         <div>
+
+#data
+<math><annotation-xml encoding="Text/htmL"><div>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,48): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math annotation-xml>
+|         encoding="Text/htmL"
+|         <div>
+
+#data
+<math><annotation-xml encoding=" text/html "><div>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,50): unexpected-html-element-in-foreign-content
+(1,50): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math annotation-xml>
+|         encoding=" text/html "
+|     <div>
+
+#data
+<math><annotation-xml> </annotation-xml>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,40): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math annotation-xml>
+|         " "
+
+#data
+<math><annotation-xml>c</annotation-xml>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,40): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math annotation-xml>
+|         "c"
+
+#data
+<math><annotation-xml><!--foo-->
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,32): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math annotation-xml>
+|         <!-- foo -->
+
+#data
+<math><annotation-xml></svg>x
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,28): unexpected-end-tag-in-math
+(1,28): unexpected-end-tag
+(1,29): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math annotation-xml>
+|         "x"
+
+#data
+<math><annotation-xml><svg>x
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,28): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math annotation-xml>
+|         <svg svg>
+|           "x"
diff --git a/tests/data/tree-construction/tests21.dat b/tests/data/tree-construction/tests21.dat
new file mode 100644
index 00000000..a926b138
--- /dev/null
+++ b/tests/data/tree-construction/tests21.dat
@@ -0,0 +1,306 @@
+#data
+<svg><![CDATA[foo]]>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,20): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       "foo"
+
+#data
+<math><![CDATA[foo]]>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,21): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       "foo"
+
+#data
+<div><![CDATA[foo]]>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,7): expected-dashes-or-doctype
+(1,20): expected-closing-tag-but-got-eof
+#new-errors
+(1:14) cdata-in-html-content
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       <!-- [CDATA[foo]] -->
+
+#data
+<svg><![CDATA[foo
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1:18) eof-in-cdata
+(1,17): expected-closing-tag-but-got-eof
+#new-errors
+(1:18) eof-in-cdata
+#document
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       "foo"
+
+#data
+<svg><![CDATA[
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1:15) eof-in-cdata
+(1,14): expected-closing-tag-but-got-eof
+#new-errors
+(1:15) eof-in-cdata
+#document
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+
+#data
+<svg><![CDATA[]]>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,17): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+
+#data
+<svg><![CDATA[]] >]]>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,21): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       "]] >"
+
+#data
+<svg><![CDATA[]]
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1:17) eof-in-cdata
+(1,16): expected-closing-tag-but-got-eof
+#new-errors
+(1:17) eof-in-cdata
+#document
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       "]]"
+
+#data
+<svg><![CDATA[]
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1:16) eof-in-cdata
+(1,15): expected-closing-tag-but-got-eof
+#new-errors
+(1:16) eof-in-cdata
+#document
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       "]"
+
+#data
+<svg><![CDATA[]>a
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1:16) eof-in-cdata
+(1,17): expected-closing-tag-but-got-eof
+#new-errors
+(1:18) eof-in-cdata
+#document
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       "]>a"
+
+#data
+<!DOCTYPE html><svg><![CDATA[foo]]]>
+#errors
+(1,36): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       "foo]"
+
+#data
+<!DOCTYPE html><svg><![CDATA[foo]]]]>
+#errors
+(1,37): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       "foo]]"
+
+#data
+<!DOCTYPE html><svg><![CDATA[foo]]]]]>
+#errors
+(1,38): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       "foo]]]"
+
+#data
+<svg><foreignObject><div><![CDATA[foo]]>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,27): expected-dashes-or-doctype
+(1,40): expected-closing-tag-but-got-eof
+#new-errors
+(1:34) cdata-in-html-content
+#document
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       <svg foreignObject>
+|         <div>
+|           <!-- [CDATA[foo]] -->
+
+#data
+<svg><![CDATA[<svg>]]>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,22): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       "<svg>"
+
+#data
+<svg><![CDATA[</svg>a]]>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,24): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       "</svg>a"
+
+#data
+<svg><![CDATA[<svg>a
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1:21) eof-in-cdata
+(1,20): expected-closing-tag-but-got-eof
+#new-errors
+(1:21) eof-in-cdata
+#document
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       "<svg>a"
+
+#data
+<svg><![CDATA[</svg>a
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1:22) eof-in-cdata
+(1,21): expected-closing-tag-but-got-eof
+#new-errors
+(1:22) eof-in-cdata
+#document
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       "</svg>a"
+
+#data
+<svg><![CDATA[<svg>]]><path>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,28): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       "<svg>"
+|       <svg path>
+
+#data
+<svg><![CDATA[<svg>]]></path>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,29): unexpected-end-tag
+(1,29): unexpected-end-tag
+(1,29): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       "<svg>"
+
+#data
+<svg><![CDATA[<svg>]]><!--path-->
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,33): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       "<svg>"
+|       <!-- path -->
+
+#data
+<svg><![CDATA[<svg>]]>path
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,26): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       "<svg>path"
+
+#data
+<svg><![CDATA[<!--svg-->]]>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,27): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       "<!--svg-->"
diff --git a/tests/data/tree-construction/tests22.dat b/tests/data/tree-construction/tests22.dat
new file mode 100644
index 00000000..31e6d9e3
--- /dev/null
+++ b/tests/data/tree-construction/tests22.dat
@@ -0,0 +1,190 @@
+#data
+<a><b><big><em><strong><div>X</a>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,33): adoption-agency-1.3
+(1,33): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <a>
+|       <b>
+|         <big>
+|           <em>
+|             <strong>
+|     <big>
+|       <em>
+|         <strong>
+|           <div>
+|             <a>
+|               "X"
+
+#data
+<a><b><div id=1><div id=2><div id=3><div id=4><div id=5><div id=6><div id=7><div id=8>A</a>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,91): adoption-agency-1.3
+(1,91): adoption-agency-1.3
+(1,91): adoption-agency-1.3
+(1,91): adoption-agency-1.3
+(1,91): adoption-agency-1.3
+(1,91): adoption-agency-1.3
+(1,91): adoption-agency-1.3
+(1,91): adoption-agency-1.3
+(1,91): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <a>
+|       <b>
+|     <b>
+|       <div>
+|         id="1"
+|         <a>
+|         <div>
+|           id="2"
+|           <a>
+|           <div>
+|             id="3"
+|             <a>
+|             <div>
+|               id="4"
+|               <a>
+|               <div>
+|                 id="5"
+|                 <a>
+|                 <div>
+|                   id="6"
+|                   <a>
+|                   <div>
+|                     id="7"
+|                     <a>
+|                     <div>
+|                       id="8"
+|                       <a>
+|                         "A"
+
+#data
+<a><b><div id=1><div id=2><div id=3><div id=4><div id=5><div id=6><div id=7><div id=8><div id=9>A</a>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,101): adoption-agency-1.3
+(1,101): adoption-agency-1.3
+(1,101): adoption-agency-1.3
+(1,101): adoption-agency-1.3
+(1,101): adoption-agency-1.3
+(1,101): adoption-agency-1.3
+(1,101): adoption-agency-1.3
+(1,101): adoption-agency-1.3
+(1,101): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <a>
+|       <b>
+|     <b>
+|       <div>
+|         id="1"
+|         <a>
+|         <div>
+|           id="2"
+|           <a>
+|           <div>
+|             id="3"
+|             <a>
+|             <div>
+|               id="4"
+|               <a>
+|               <div>
+|                 id="5"
+|                 <a>
+|                 <div>
+|                   id="6"
+|                   <a>
+|                   <div>
+|                     id="7"
+|                     <a>
+|                     <div>
+|                       id="8"
+|                       <a>
+|                         <div>
+|                           id="9"
+|                           "A"
+
+#data
+<a><b><div id=1><div id=2><div id=3><div id=4><div id=5><div id=6><div id=7><div id=8><div id=9><div id=10>A</a>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,112): adoption-agency-1.3
+(1,112): adoption-agency-1.3
+(1,112): adoption-agency-1.3
+(1,112): adoption-agency-1.3
+(1,112): adoption-agency-1.3
+(1,112): adoption-agency-1.3
+(1,112): adoption-agency-1.3
+(1,112): adoption-agency-1.3
+(1,112): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <a>
+|       <b>
+|     <b>
+|       <div>
+|         id="1"
+|         <a>
+|         <div>
+|           id="2"
+|           <a>
+|           <div>
+|             id="3"
+|             <a>
+|             <div>
+|               id="4"
+|               <a>
+|               <div>
+|                 id="5"
+|                 <a>
+|                 <div>
+|                   id="6"
+|                   <a>
+|                   <div>
+|                     id="7"
+|                     <a>
+|                     <div>
+|                       id="8"
+|                       <a>
+|                         <div>
+|                           id="9"
+|                           <div>
+|                             id="10"
+|                             "A"
+
+#data
+<cite><b><cite><i><cite><i><cite><i><div>X</b>TEST
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,46): adoption-agency-1.3
+(1,50): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <cite>
+|       <b>
+|         <cite>
+|           <i>
+|             <cite>
+|               <i>
+|                 <cite>
+|                   <i>
+|       <i>
+|         <i>
+|           <div>
+|             <b>
+|               "X"
+|             "TEST"
diff --git a/tests/data/tree-construction/tests23.dat b/tests/data/tree-construction/tests23.dat
new file mode 100644
index 00000000..49e4a4ac
--- /dev/null
+++ b/tests/data/tree-construction/tests23.dat
@@ -0,0 +1,168 @@
+#data
+<p><font size=4><font color=red><font size=4><font size=4><font size=4><font size=4><font size=4><font color=red><p>X
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,116): unexpected-end-tag
+(1,117): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <font>
+|         size="4"
+|         <font>
+|           color="red"
+|           <font>
+|             size="4"
+|             <font>
+|               size="4"
+|               <font>
+|                 size="4"
+|                 <font>
+|                   size="4"
+|                   <font>
+|                     size="4"
+|                     <font>
+|                       color="red"
+|     <p>
+|       <font>
+|         color="red"
+|         <font>
+|           size="4"
+|           <font>
+|             size="4"
+|             <font>
+|               size="4"
+|               <font>
+|                 color="red"
+|                 "X"
+
+#data
+<p><font size=4><font size=4><font size=4><font size=4><p>X
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,58): unexpected-end-tag
+(1,59): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <font>
+|         size="4"
+|         <font>
+|           size="4"
+|           <font>
+|             size="4"
+|             <font>
+|               size="4"
+|     <p>
+|       <font>
+|         size="4"
+|         <font>
+|           size="4"
+|           <font>
+|             size="4"
+|             "X"
+
+#data
+<p><font size=4><font size=4><font size=4><font size="5"><font size=4><p>X
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,73): unexpected-end-tag
+(1,74): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <font>
+|         size="4"
+|         <font>
+|           size="4"
+|           <font>
+|             size="4"
+|             <font>
+|               size="5"
+|               <font>
+|                 size="4"
+|     <p>
+|       <font>
+|         size="4"
+|         <font>
+|           size="4"
+|           <font>
+|             size="5"
+|             <font>
+|               size="4"
+|               "X"
+
+#data
+<p><font size=4 id=a><font size=4 id=b><font size=4><font size=4><p>X
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,68): unexpected-end-tag
+(1,69): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <font>
+|         id="a"
+|         size="4"
+|         <font>
+|           id="b"
+|           size="4"
+|           <font>
+|             size="4"
+|             <font>
+|               size="4"
+|     <p>
+|       <font>
+|         id="a"
+|         size="4"
+|         <font>
+|           id="b"
+|           size="4"
+|           <font>
+|             size="4"
+|             <font>
+|               size="4"
+|               "X"
+
+#data
+<p><b id=a><b id=a><b id=a><b><object><b id=a><b id=a>X</object><p>Y
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,64): end-tag-too-early
+(1,67): unexpected-end-tag
+(1,68): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <b>
+|         id="a"
+|         <b>
+|           id="a"
+|           <b>
+|             id="a"
+|             <b>
+|               <object>
+|                 <b>
+|                   id="a"
+|                   <b>
+|                     id="a"
+|                     "X"
+|     <p>
+|       <b>
+|         id="a"
+|         <b>
+|           id="a"
+|           <b>
+|             id="a"
+|             <b>
+|               "Y"
diff --git a/tests/data/tree-construction/tests24.dat b/tests/data/tree-construction/tests24.dat
new file mode 100644
index 00000000..f6dc7eb4
--- /dev/null
+++ b/tests/data/tree-construction/tests24.dat
@@ -0,0 +1,79 @@
+#data
+<!DOCTYPE html>&NotEqualTilde;
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     "≂̸"
+
+#data
+<!DOCTYPE html>&NotEqualTilde;A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     "≂̸A"
+
+#data
+<!DOCTYPE html>&ThickSpace;
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     "  "
+
+#data
+<!DOCTYPE html>&ThickSpace;A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     "  A"
+
+#data
+<!DOCTYPE html>&NotSubset;
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     "⊂⃒"
+
+#data
+<!DOCTYPE html>&NotSubset;A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     "⊂⃒A"
+
+#data
+<!DOCTYPE html>&Gopf;
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     "𝔾"
+
+#data
+<!DOCTYPE html>&Gopf;A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     "𝔾A"
diff --git a/tests/data/tree-construction/tests25.dat b/tests/data/tree-construction/tests25.dat
new file mode 100644
index 00000000..5bb369b2
--- /dev/null
+++ b/tests/data/tree-construction/tests25.dat
@@ -0,0 +1,288 @@
+#data
+<!DOCTYPE html><body><foo>A
+#errors
+(1,27): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <foo>
+|       "A"
+
+#data
+<!DOCTYPE html><body><area>A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <area>
+|     "A"
+
+#data
+<!DOCTYPE html><body><base>A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <base>
+|     "A"
+
+#data
+<!DOCTYPE html><body><basefont>A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <basefont>
+|     "A"
+
+#data
+<!DOCTYPE html><body><bgsound>A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <bgsound>
+|     "A"
+
+#data
+<!DOCTYPE html><body><br>A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <br>
+|     "A"
+
+#data
+<!DOCTYPE html><body><col>A
+#errors
+(1,26): unexpected-start-tag-ignored
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     "A"
+
+#data
+<!DOCTYPE html><body><command>A
+#errors
+eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <command>
+|       "A"
+
+#data
+<!DOCTYPE html><body><embed>A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <embed>
+|     "A"
+
+#data
+<!DOCTYPE html><body><frame>A
+#errors
+(1,28): unexpected-start-tag-ignored
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     "A"
+
+#data
+<!DOCTYPE html><body><hr>A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <hr>
+|     "A"
+
+#data
+<!DOCTYPE html><body><img>A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <img>
+|     "A"
+
+#data
+<!DOCTYPE html><body><input>A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <input>
+|     "A"
+
+#data
+<!DOCTYPE html><body><keygen>A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <keygen>
+|     "A"
+
+#data
+<!DOCTYPE html><keygen>A</keygen>B
+#errors
+33: Stray end tag “keygen”.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <keygen>
+|     "AB"
+
+#data
+</keygen>A
+#errors
+9: End tag seen without seeing a doctype first. Expected “<!DOCTYPE html>”.
+9: Stray end tag “keygen”.
+#document
+| <html>
+|   <head>
+|   <body>
+|     "A"
+
+#data
+<!DOCTYPE html></keygen>A
+#errors
+24: Stray end tag “keygen”.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     "A"
+
+#data
+<!DOCTYPE html><head></keygen>A
+#errors
+30: Stray end tag “keygen”.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     "A"
+
+#data
+<!DOCTYPE html><head></head></keygen>A
+#errors
+30: Stray end tag “keygen”.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     "A"
+
+#data
+<!DOCTYPE html><body></keygen>A
+#errors
+30: Stray end tag “keygen”.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     "A"
+
+#data
+<!DOCTYPE html><body><link>A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <link>
+|     "A"
+
+#data
+<!DOCTYPE html><body><meta>A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <meta>
+|     "A"
+
+#data
+<!DOCTYPE html><body><param>A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <param>
+|     "A"
+
+#data
+<!DOCTYPE html><body><source>A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <source>
+|     "A"
+
+#data
+<!DOCTYPE html><body><track>A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <track>
+|     "A"
+
+#data
+<!DOCTYPE html><body><wbr>A
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <wbr>
+|     "A"
diff --git a/tests/data/tree-construction/tests26.dat b/tests/data/tree-construction/tests26.dat
new file mode 100644
index 00000000..1ba2be2d
--- /dev/null
+++ b/tests/data/tree-construction/tests26.dat
@@ -0,0 +1,453 @@
+#data
+<!DOCTYPE html><body><a href='#1'><nobr>1<nobr></a><br><a href='#2'><nobr>2<nobr></a><br><a href='#3'><nobr>3<nobr></a>
+#errors
+(1,47): unexpected-start-tag-implies-end-tag
+(1,51): adoption-agency-1.3
+(1,74): unexpected-start-tag-implies-end-tag
+(1,74): adoption-agency-1.3
+(1,81): unexpected-start-tag-implies-end-tag
+(1,85): adoption-agency-1.3
+(1,108): unexpected-start-tag-implies-end-tag
+(1,108): adoption-agency-1.3
+(1,115): unexpected-start-tag-implies-end-tag
+(1,119): adoption-agency-1.3
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <a>
+|       href="#1"
+|       <nobr>
+|         "1"
+|       <nobr>
+|     <nobr>
+|       <br>
+|       <a>
+|         href="#2"
+|     <a>
+|       href="#2"
+|       <nobr>
+|         "2"
+|       <nobr>
+|     <nobr>
+|       <br>
+|       <a>
+|         href="#3"
+|     <a>
+|       href="#3"
+|       <nobr>
+|         "3"
+|       <nobr>
+
+#data
+<!DOCTYPE html><body><b><nobr>1<nobr></b><i><nobr>2<nobr></i>3
+#errors
+(1,37): unexpected-start-tag-implies-end-tag
+(1,41): adoption-agency-1.3
+(1,50): unexpected-start-tag-implies-end-tag
+(1,50): adoption-agency-1.3
+(1,57): unexpected-start-tag-implies-end-tag
+(1,61): adoption-agency-1.3
+(1,62): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <b>
+|       <nobr>
+|         "1"
+|       <nobr>
+|     <nobr>
+|       <i>
+|     <i>
+|       <nobr>
+|         "2"
+|       <nobr>
+|     <nobr>
+|       "3"
+
+#data
+<!DOCTYPE html><body><b><nobr>1<table><nobr></b><i><nobr>2<nobr></i>3
+#errors
+(1,44): foster-parenting-start-tag
+(1,48): foster-parenting-end-tag
+(1,48): adoption-agency-1.3
+(1,51): foster-parenting-start-tag
+(1,57): foster-parenting-start-tag
+(1,57): nobr-already-in-scope
+(1,57): adoption-agency-1.2
+(1,58): foster-parenting-character
+(1,64): foster-parenting-start-tag
+(1,64): nobr-already-in-scope
+(1,68): foster-parenting-end-tag
+(1,68): adoption-agency-1.2
+(1,69): foster-parenting-character
+(1,69): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <b>
+|       <nobr>
+|         "1"
+|         <nobr>
+|           <i>
+|         <i>
+|           <nobr>
+|             "2"
+|           <nobr>
+|         <nobr>
+|           "3"
+|         <table>
+
+#data
+<!DOCTYPE html><body><b><nobr>1<table><tr><td><nobr></b><i><nobr>2<nobr></i>3
+#errors
+(1,56): unexpected-end-tag
+(1,65): unexpected-start-tag-implies-end-tag
+(1,65): adoption-agency-1.3
+(1,72): unexpected-start-tag-implies-end-tag
+(1,76): adoption-agency-1.3
+(1,77): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <b>
+|       <nobr>
+|         "1"
+|         <table>
+|           <tbody>
+|             <tr>
+|               <td>
+|                 <nobr>
+|                   <i>
+|                 <i>
+|                   <nobr>
+|                     "2"
+|                   <nobr>
+|                 <nobr>
+|                   "3"
+
+#data
+<!DOCTYPE html><body><b><nobr>1<div><nobr></b><i><nobr>2<nobr></i>3
+#errors
+(1,42): unexpected-start-tag-implies-end-tag
+(1,42): adoption-agency-1.3
+(1,46): adoption-agency-1.3
+(1,46): adoption-agency-1.3
+(1,55): unexpected-start-tag-implies-end-tag
+(1,55): adoption-agency-1.3
+(1,62): unexpected-start-tag-implies-end-tag
+(1,66): adoption-agency-1.3
+(1,67): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <b>
+|       <nobr>
+|         "1"
+|     <div>
+|       <b>
+|         <nobr>
+|         <nobr>
+|       <nobr>
+|         <i>
+|       <i>
+|         <nobr>
+|           "2"
+|         <nobr>
+|       <nobr>
+|         "3"
+
+#data
+<!DOCTYPE html><body><b><nobr>1<nobr></b><div><i><nobr>2<nobr></i>3
+#errors
+(1,37): unexpected-start-tag-implies-end-tag
+(1,41): adoption-agency-1.3
+(1,55): unexpected-start-tag-implies-end-tag
+(1,55): adoption-agency-1.3
+(1,62): unexpected-start-tag-implies-end-tag
+(1,66): adoption-agency-1.3
+(1,67): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <b>
+|       <nobr>
+|         "1"
+|       <nobr>
+|     <div>
+|       <nobr>
+|         <i>
+|       <i>
+|         <nobr>
+|           "2"
+|         <nobr>
+|       <nobr>
+|         "3"
+
+#data
+<!DOCTYPE html><body><b><nobr>1<nobr><ins></b><i><nobr>
+#errors
+(1,37): unexpected-start-tag-implies-end-tag
+(1,46): adoption-agency-1.3
+(1,55): unexpected-start-tag-implies-end-tag
+(1,55): adoption-agency-1.3
+(1,55): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <b>
+|       <nobr>
+|         "1"
+|       <nobr>
+|         <ins>
+|     <nobr>
+|       <i>
+|     <i>
+|       <nobr>
+
+#data
+<!DOCTYPE html><body><b><nobr>1<ins><nobr></b><i>2
+#errors
+(1,42): unexpected-start-tag-implies-end-tag
+(1,42): adoption-agency-1.3
+(1,46): adoption-agency-1.3
+(1,50): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <b>
+|       <nobr>
+|         "1"
+|         <ins>
+|       <nobr>
+|     <nobr>
+|       <i>
+|         "2"
+
+#data
+<!DOCTYPE html><body><b>1<nobr></b><i><nobr>2</i>
+#errors
+(1,35): adoption-agency-1.3
+(1,44): unexpected-start-tag-implies-end-tag
+(1,44): adoption-agency-1.3
+(1,49): adoption-agency-1.3
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <b>
+|       "1"
+|       <nobr>
+|     <nobr>
+|       <i>
+|     <i>
+|       <nobr>
+|         "2"
+
+#data
+<p><code x</code></p>
+
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,11): invalid-character-in-attribute-name
+(1,12): unexpected-character-after-solidus-in-tag
+(1,21): unexpected-end-tag
+(2,0): expected-closing-tag-but-got-eof
+#new-errors
+(1:11) unexpected-character-in-attribute-name
+(1:13) unexpected-solidus-in-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <code>
+|         code=""
+|         x<=""
+|     <code>
+|       code=""
+|       x<=""
+|       "
+"
+
+#data
+<!DOCTYPE html><svg><foreignObject><p><i></p>a
+#errors
+(1,45): unexpected-end-tag
+(1,46): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       <svg foreignObject>
+|         <p>
+|           <i>
+|         <i>
+|           "a"
+
+#data
+<!DOCTYPE html><table><tr><td><svg><foreignObject><p><i></p>a
+#errors
+(1,60): unexpected-end-tag
+(1,61): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             <svg svg>
+|               <svg foreignObject>
+|                 <p>
+|                   <i>
+|                 <i>
+|                   "a"
+
+#data
+<!DOCTYPE html><math><mtext><p><i></p>a
+#errors
+(1,38): unexpected-end-tag
+(1,39): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math mtext>
+|         <p>
+|           <i>
+|         <i>
+|           "a"
+
+#data
+<!DOCTYPE html><table><tr><td><math><mtext><p><i></p>a
+#errors
+(1,53): unexpected-end-tag
+(1,54): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             <math math>
+|               <math mtext>
+|                 <p>
+|                   <i>
+|                 <i>
+|                   "a"
+
+#data
+<!DOCTYPE html><body><div><!/div>a
+#errors
+(1,28): expected-dashes-or-doctype
+(1,34): expected-closing-tag-but-got-eof
+#new-errors
+(1:29) incorrectly-opened-comment
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       <!-- /div -->
+|       "a"
+
+#data
+<button><p><button>
+#errors
+Line 1 Col 8 Unexpected start tag (button). Expected DOCTYPE.
+Line 1 Col 19 Unexpected start tag (button) implies end tag (button).
+Line 1 Col 19 Expected closing tag. Unexpected end of file.
+#document
+| <html>
+|   <head>
+|   <body>
+|     <button>
+|       <p>
+|     <button>
+
+#data
+<svg></p><foo>
+#errors
+(1:1) Missing doctype
+9: HTML end tag “p” in a foreign namespace context.
+(1:6) Unexpected </p> from in body insertion mode
+(1:16) Unexpected EOF
+#document
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|     <p>
+|     <foo>
+
+#data
+<svg></br><foo>
+#errors
+(1:1) Missing doctype
+10: HTML end tag “br” in a foreign namespace context.
+(1:6) Unexpected </br> from in body insertion mode
+(1:16) Unexpected EOF
+#document
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|     <br>
+|     <foo>
+
+#data
+<math></p><foo>
+#errors
+(1:1) Missing doctype
+10: HTML end tag “p” in a foreign namespace context.
+(1:7) Unexpected </p> from in body insertion mode
+(1:16) Unexpected EOF
+#document
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|     <p>
+|     <foo>
+
+#data
+<math></br><foo>
+#errors
+(1:1) Missing doctype
+11: HTML end tag “br” in a foreign namespace context.
+(1:7) Unexpected </br> from in body insertion mode
+(1:17) Unexpected EOF
+#document
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|     <br>
+|     <foo>
diff --git a/tests/data/tree-construction/tests3.dat b/tests/data/tree-construction/tests3.dat
new file mode 100644
index 00000000..c7583d99
--- /dev/null
+++ b/tests/data/tree-construction/tests3.dat
@@ -0,0 +1,305 @@
+#data
+<head></head><style></style>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,20): unexpected-start-tag-out-of-my-head
+#document
+| <html>
+|   <head>
+|     <style>
+|   <body>
+
+#data
+<head></head><script></script>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,21): unexpected-start-tag-out-of-my-head
+#document
+| <html>
+|   <head>
+|     <script>
+|   <body>
+
+#data
+<head></head><!-- --><style></style><!-- --><script></script>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,28): unexpected-start-tag-out-of-my-head
+(1,52): unexpected-start-tag-out-of-my-head
+#document
+| <html>
+|   <head>
+|     <style>
+|     <script>
+|   <!--   -->
+|   <!--   -->
+|   <body>
+
+#data
+<head></head><!-- -->x<style></style><!-- --><script></script>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <!--   -->
+|   <body>
+|     "x"
+|     <style>
+|     <!--   -->
+|     <script>
+
+#data
+<!DOCTYPE html><html><head></head><body><pre>
+</pre></body></html>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <pre>
+
+#data
+<!DOCTYPE html><html><head></head><body><pre>
+foo</pre></body></html>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <pre>
+|       "foo"
+
+#data
+<!DOCTYPE html><html><head></head><body><pre>
+
+foo</pre></body></html>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <pre>
+|       "
+foo"
+
+#data
+<!DOCTYPE html><html><head></head><body><pre>
+foo
+</pre></body></html>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <pre>
+|       "foo
+"
+
+#data
+<!DOCTYPE html><html><head></head><body><pre>x</pre><span>
+</span></body></html>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <pre>
+|       "x"
+|     <span>
+|       "
+"
+
+#data
+<!DOCTYPE html><html><head></head><body><pre>x
+y</pre></body></html>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <pre>
+|       "x
+y"
+
+#data
+<!DOCTYPE html><html><head></head><body><pre>x<div>
+y</pre></body></html>
+#errors
+(2,7): end-tag-too-early
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <pre>
+|       "x"
+|       <div>
+|         "
+y"
+
+#data
+<!DOCTYPE html><pre>&#x0a;&#x0a;A</pre>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <pre>
+|       "
+A"
+
+#data
+<!DOCTYPE html><HTML><META><HEAD></HEAD></HTML>
+#errors
+(1,33): two-heads-are-not-better-than-one
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <meta>
+|   <body>
+
+#data
+<!DOCTYPE html><HTML><HEAD><head></HEAD></HTML>
+#errors
+(1,33): two-heads-are-not-better-than-one
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+
+#data
+<textarea>foo<span>bar</span><i>baz
+#errors
+(1,10): expected-doctype-but-got-start-tag
+(1,35): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <textarea>
+|       "foo<span>bar</span><i>baz"
+
+#data
+<title>foo<span>bar</em><i>baz
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,30): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|     <title>
+|       "foo<span>bar</em><i>baz"
+|   <body>
+
+#data
+<!DOCTYPE html><textarea>
+</textarea>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <textarea>
+
+#data
+<!DOCTYPE html><textarea>
+foo</textarea>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <textarea>
+|       "foo"
+
+#data
+<!DOCTYPE html><textarea>
+
+foo</textarea>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <textarea>
+|       "
+foo"
+
+#data
+<!DOCTYPE html><html><head></head><body><ul><li><div><p><li></ul></body></html>
+#errors
+(1,60): end-tag-too-early
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <ul>
+|       <li>
+|         <div>
+|           <p>
+|       <li>
+
+#data
+<!doctype html><nobr><nobr><nobr>
+#errors
+(1,27): unexpected-start-tag-implies-end-tag
+(1,33): unexpected-start-tag-implies-end-tag
+(1,33): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <nobr>
+|     <nobr>
+|     <nobr>
+
+#data
+<!doctype html><nobr><nobr></nobr><nobr>
+#errors
+(1,27): unexpected-start-tag-implies-end-tag
+(1,40): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <nobr>
+|     <nobr>
+|     <nobr>
+
+#data
+<!doctype html><html><body><p><table></table></body></html>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|     <table>
+
+#data
+<p><table></table>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <table>
diff --git a/tests/data/tree-construction/tests4.dat b/tests/data/tree-construction/tests4.dat
new file mode 100644
index 00000000..4f0cf70e
--- /dev/null
+++ b/tests/data/tree-construction/tests4.dat
@@ -0,0 +1,74 @@
+#data
+direct div content
+#errors
+#document-fragment
+div
+#document
+| "direct div content"
+
+#data
+direct textarea content
+#errors
+#document-fragment
+textarea
+#document
+| "direct textarea content"
+
+#data
+textarea content with <em>pseudo</em> <foo>markup
+#errors
+#document-fragment
+textarea
+#document
+| "textarea content with <em>pseudo</em> <foo>markup"
+
+#data
+this is &#x0043;DATA inside a <style> element
+#errors
+#document-fragment
+style
+#document
+| "this is &#x0043;DATA inside a <style> element"
+
+#data
+</plaintext>
+#errors
+#document-fragment
+plaintext
+#document
+| "</plaintext>"
+
+#data
+setting html's innerHTML
+#errors
+#document-fragment
+html
+#document
+| <head>
+| <body>
+|   "setting html's innerHTML"
+
+#data
+<title>setting head's innerHTML</title>
+#errors
+#document-fragment
+head
+#document
+| <title>
+|   "setting head's innerHTML"
+
+#data
+direct <title> content
+#errors
+#document-fragment
+title
+#document
+| "direct <title> content"
+
+#data
+<!-- inside </script> -->
+#errors
+#document-fragment
+script
+#document
+| "<!-- inside </script> -->"
diff --git a/tests/data/tree-construction/tests5.dat b/tests/data/tree-construction/tests5.dat
new file mode 100644
index 00000000..1ef8cae4
--- /dev/null
+++ b/tests/data/tree-construction/tests5.dat
@@ -0,0 +1,210 @@
+#data
+<style> <!-- </style>x
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|     <style>
+|       " <!-- "
+|   <body>
+|     "x"
+
+#data
+<style> <!-- </style> --> </style>x
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,34): unexpected-end-tag
+#document
+| <html>
+|   <head>
+|     <style>
+|       " <!-- "
+|     " "
+|   <body>
+|     "--> x"
+
+#data
+<style> <!--> </style>x
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|     <style>
+|       " <!--> "
+|   <body>
+|     "x"
+
+#data
+<style> <!---> </style>x
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|     <style>
+|       " <!---> "
+|   <body>
+|     "x"
+
+#data
+<iframe> <!---> </iframe>x
+#errors
+(1,8): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <iframe>
+|       " <!---> "
+|     "x"
+
+#data
+<iframe> <!--- </iframe>->x</iframe> --> </iframe>x
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,36): unexpected-end-tag
+(1,50): unexpected-end-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <iframe>
+|       " <!--- "
+|     "->x --> x"
+
+#data
+<script> <!-- </script> --> </script>x
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,37): unexpected-end-tag
+#document
+| <html>
+|   <head>
+|     <script>
+|       " <!-- "
+|     " "
+|   <body>
+|     "--> x"
+
+#data
+<title> <!-- </title> --> </title>x
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,34): unexpected-end-tag
+#document
+| <html>
+|   <head>
+|     <title>
+|       " <!-- "
+|     " "
+|   <body>
+|     "--> x"
+
+#data
+<textarea> <!--- </textarea>->x</textarea> --> </textarea>x
+#errors
+(1,10): expected-doctype-but-got-start-tag
+(1,42): unexpected-end-tag
+(1,58): unexpected-end-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <textarea>
+|       " <!--- "
+|     "->x --> x"
+
+#data
+<style> <!</-- </style>x
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|     <style>
+|       " <!</-- "
+|   <body>
+|     "x"
+
+#data
+<p><xmp></xmp>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|     <xmp>
+
+#data
+<xmp> <!-- > --> </xmp>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <xmp>
+|       " <!-- > --> "
+
+#data
+<title>&amp;</title>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|     <title>
+|       "&"
+|   <body>
+
+#data
+<title><!--&amp;--></title>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|     <title>
+|       "<!--&-->"
+|   <body>
+
+#data
+<title><!--</title>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|     <title>
+|       "<!--"
+|   <body>
+
+#data
+<noscript><!--</noscript>--></noscript>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+(1,39): unexpected-end-tag
+#script-on
+#document
+| <html>
+|   <head>
+|     <noscript>
+|       "<!--"
+|   <body>
+|     "-->"
+
+#data
+<noscript><!--</noscript>--></noscript>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+#script-off
+#document
+| <html>
+|   <head>
+|     <noscript>
+|       <!-- </noscript> -->
+|   <body>
diff --git a/tests/data/tree-construction/tests6.dat b/tests/data/tree-construction/tests6.dat
new file mode 100644
index 00000000..8c36dd3d
--- /dev/null
+++ b/tests/data/tree-construction/tests6.dat
@@ -0,0 +1,663 @@
+#data
+<!doctype html></head> <head>
+#errors
+(1,29): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   " "
+|   <body>
+
+#data
+<!doctype html><form><div></form><div>
+#errors
+(1,33): end-tag-too-early-ignored
+(1,38): expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <form>
+|       <div>
+|         <div>
+
+#data
+<!doctype html><title>&amp;</title>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <title>
+|       "&"
+|   <body>
+
+#data
+<!doctype html><title><!--&amp;--></title>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <title>
+|       "<!--&-->"
+|   <body>
+
+#data
+<!doctype>
+#errors
+(1,10): expected-doctype-name-but-got-right-bracket
+(1,10): unknown-doctype
+#new-errors
+(1:10) missing-doctype-name
+#document
+| <!DOCTYPE >
+| <html>
+|   <head>
+|   <body>
+
+#data
+<!---x
+#errors
+(1,6): eof-in-comment
+(1,6): expected-doctype-but-got-eof
+#new-errors
+(1:7) eof-in-comment
+#document
+| <!-- -x -->
+| <html>
+|   <head>
+|   <body>
+
+#data
+<body>
+<div>
+#errors
+(1,6): unexpected-start-tag
+(2,5): expected-closing-tag-but-got-eof
+#document-fragment
+div
+#document
+| "
+"
+| <div>
+
+#data
+<frameset></frameset>
+foo
+#errors
+(1,10): expected-doctype-but-got-start-tag
+(2,1): unexpected-char-after-frameset
+(2,2): unexpected-char-after-frameset
+(2,3): unexpected-char-after-frameset
+#document
+| <html>
+|   <head>
+|   <frameset>
+|   "
+"
+
+#data
+<frameset></frameset>
+<noframes>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+(2,10): expected-named-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <frameset>
+|   "
+"
+|   <noframes>
+
+#data
+<frameset></frameset>
+<div>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+(2,5): unexpected-start-tag-after-frameset
+#document
+| <html>
+|   <head>
+|   <frameset>
+|   "
+"
+
+#data
+<frameset></frameset>
+</html>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <frameset>
+|   "
+"
+
+#data
+<frameset></frameset>
+</div>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+(2,6): unexpected-end-tag-after-frameset
+#document
+| <html>
+|   <head>
+|   <frameset>
+|   "
+"
+
+#data
+<form><form>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,12): unexpected-start-tag
+(1,12): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <form>
+
+#data
+<button><button>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,16): unexpected-start-tag-implies-end-tag
+(1,16): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <button>
+|     <button>
+
+#data
+<table><tr><td></th>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,20): unexpected-end-tag
+(1,20): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+
+#data
+<table><caption><td>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,20): unexpected-cell-in-table-body
+(1,20): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <caption>
+|       <tbody>
+|         <tr>
+|           <td>
+
+#data
+<table><caption><div>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,21): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <caption>
+|         <div>
+
+#data
+</caption><div>
+#errors
+(1,10): XXX-undefined-error
+(1,15): expected-closing-tag-but-got-eof
+#document-fragment
+caption
+#document
+| <div>
+
+#data
+<table><caption><div></caption>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,31): expected-one-end-tag-but-got-another
+(1,31): eof-in-table
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <caption>
+|         <div>
+
+#data
+<table><caption></table>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <caption>
+
+#data
+</table><div>
+#errors
+(1,8): unexpected-end-tag
+(1,13): expected-closing-tag-but-got-eof
+#document-fragment
+caption
+#document
+| <div>
+
+#data
+<table><caption></body></col></colgroup></html></tbody></td></tfoot></th></thead></tr>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,23): unexpected-end-tag
+(1,29): unexpected-end-tag
+(1,40): unexpected-end-tag
+(1,47): unexpected-end-tag
+(1,55): unexpected-end-tag
+(1,60): unexpected-end-tag
+(1,68): unexpected-end-tag
+(1,73): unexpected-end-tag
+(1,81): unexpected-end-tag
+(1,86): unexpected-end-tag
+(1,86): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <caption>
+
+#data
+<table><caption><div></div>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,27): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <caption>
+|         <div>
+
+#data
+<table><tr><td></body></caption></col></colgroup></html>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,22): unexpected-end-tag
+(1,32): unexpected-end-tag
+(1,38): unexpected-end-tag
+(1,49): unexpected-end-tag
+(1,56): unexpected-end-tag
+(1,56): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+
+#data
+</table></tbody></tfoot></thead></tr><div>
+#errors
+(1,8): unexpected-end-tag
+(1,16): unexpected-end-tag
+(1,24): unexpected-end-tag
+(1,32): unexpected-end-tag
+(1,37): unexpected-end-tag
+(1,42): expected-closing-tag-but-got-eof
+#document-fragment
+td
+#document
+| <div>
+
+#data
+<table><colgroup>foo
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,18): foster-parenting-character-in-table
+(1,19): foster-parenting-character-in-table
+(1,20): foster-parenting-character-in-table
+(1,20): eof-in-table
+#document
+| <html>
+|   <head>
+|   <body>
+|     "foo"
+|     <table>
+|       <colgroup>
+
+#data
+foo<col>
+#errors
+(1,1): unexpected-character-in-colgroup
+(1,2): unexpected-character-in-colgroup
+(1,3): unexpected-character-in-colgroup
+#document-fragment
+colgroup
+#document
+| <col>
+
+#data
+<table><colgroup></col>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,23): no-end-tag
+(1,23): eof-in-table
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <colgroup>
+
+#data
+<frameset><div>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+(1,15): unexpected-start-tag-in-frameset
+(1,15): eof-in-frameset
+#document
+| <html>
+|   <head>
+|   <frameset>
+
+#data
+</frameset><frame>
+#errors
+(1,11): unexpected-frameset-in-frameset-innerhtml
+#document-fragment
+frameset
+#document
+| <frame>
+
+#data
+<frameset></div>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+(1,16): unexpected-end-tag-in-frameset
+(1,16): eof-in-frameset
+#document
+| <html>
+|   <head>
+|   <frameset>
+
+#data
+</body><div>
+#errors
+(1,7): unexpected-close-tag
+(1,12): expected-closing-tag-but-got-eof
+#document-fragment
+body
+#document
+| <div>
+
+#data
+<table><tr><div>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,16): unexpected-start-tag-implies-table-voodoo
+(1,16): eof-in-table
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|     <table>
+|       <tbody>
+|         <tr>
+
+#data
+</tr><td>
+#errors
+(1,5): unexpected-end-tag
+#document-fragment
+tr
+#document
+| <td>
+
+#data
+</tbody></tfoot></thead><td>
+#errors
+(1,8): unexpected-end-tag
+(1,16): unexpected-end-tag
+(1,24): unexpected-end-tag
+#document-fragment
+tr
+#document
+| <td>
+
+#data
+<table><tr><div><td>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,16): foster-parenting-start-tag
+(1,20): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+
+#data
+<caption><col><colgroup><tbody><tfoot><thead><tr>
+#errors
+(1,9): unexpected-start-tag
+(1,14): unexpected-start-tag
+(1,24): unexpected-start-tag
+(1,31): unexpected-start-tag
+(1,38): unexpected-start-tag
+(1,45): unexpected-start-tag
+#document-fragment
+tbody
+#document
+| <tr>
+
+#data
+<table><tbody></thead>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,22): unexpected-end-tag-in-table-body
+(1,22): eof-in-table
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+
+#data
+</table><tr>
+#errors
+(1,8): unexpected-end-tag
+#document-fragment
+tbody
+#document
+| <tr>
+
+#data
+<table><tbody></body></caption></col></colgroup></html></td></th></tr>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,21): unexpected-end-tag-in-table-body
+(1,31): unexpected-end-tag-in-table-body
+(1,37): unexpected-end-tag-in-table-body
+(1,48): unexpected-end-tag-in-table-body
+(1,55): unexpected-end-tag-in-table-body
+(1,60): unexpected-end-tag-in-table-body
+(1,65): unexpected-end-tag-in-table-body
+(1,70): unexpected-end-tag-in-table-body
+(1,70): eof-in-table
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+
+#data
+<table><tbody></div>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,20): unexpected-end-tag-implies-table-voodoo
+(1,20): end-tag-too-early
+(1,20): eof-in-table
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+
+#data
+<table><table>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,14): unexpected-start-tag-implies-end-tag
+(1,14): eof-in-table
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|     <table>
+
+#data
+<table></body></caption></col></colgroup></html></tbody></td></tfoot></th></thead></tr>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,14): unexpected-end-tag
+(1,24): unexpected-end-tag
+(1,30): unexpected-end-tag
+(1,41): unexpected-end-tag
+(1,48): unexpected-end-tag
+(1,56): unexpected-end-tag
+(1,61): unexpected-end-tag
+(1,69): unexpected-end-tag
+(1,74): unexpected-end-tag
+(1,82): unexpected-end-tag
+(1,87): unexpected-end-tag
+(1,87): eof-in-table
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+
+#data
+</table><tr>
+#errors
+(1,8): unexpected-end-tag
+#document-fragment
+table
+#document
+| <tbody>
+|   <tr>
+
+#data
+<body></body></html>
+#errors
+(1,20): unexpected-end-tag-after-body-innerhtml
+#document-fragment
+html
+#document
+| <head>
+| <body>
+
+#data
+<html><frameset></frameset></html> 
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <frameset>
+|   " "
+
+#data
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"><html></html>
+#errors
+(1,50): doctype-has-public-identifier
+#document
+| <!DOCTYPE html "-//W3C//DTD HTML 4.01//EN" "">
+| <html>
+|   <head>
+|   <body>
+
+#data
+<param><frameset></frameset>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,17): unexpected-start-tag
+#document
+| <html>
+|   <head>
+|   <frameset>
+
+#data
+<source><frameset></frameset>
+#errors
+(1,8): expected-doctype-but-got-start-tag
+(1,18): unexpected-start-tag
+#document
+| <html>
+|   <head>
+|   <frameset>
+
+#data
+<track><frameset></frameset>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,17): unexpected-start-tag
+#document
+| <html>
+|   <head>
+|   <frameset>
+
+#data
+</html><frameset></frameset>
+#errors
+(1,7): expected-doctype-but-got-end-tag
+(1,17): expected-eof-but-got-start-tag
+(1,17): unexpected-start-tag
+#document
+| <html>
+|   <head>
+|   <frameset>
+
+#data
+</body><frameset></frameset>
+#errors
+(1,7): expected-doctype-but-got-end-tag
+(1,17): unexpected-start-tag-after-body
+(1,17): unexpected-start-tag
+#document
+| <html>
+|   <head>
+|   <frameset>
diff --git a/tests/data/tree-construction/tests7.dat b/tests/data/tree-construction/tests7.dat
new file mode 100644
index 00000000..aa7e16b4
--- /dev/null
+++ b/tests/data/tree-construction/tests7.dat
@@ -0,0 +1,453 @@
+#data
+<!doctype html><body><title>X</title>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <title>
+|       "X"
+
+#data
+<!doctype html><table><title>X</title></table>
+#errors
+(1,29): unexpected-start-tag-implies-table-voodoo
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <title>
+|       "X"
+|     <table>
+
+#data
+<!doctype html><head></head><title>X</title>
+#errors
+(1,35): unexpected-start-tag-out-of-my-head
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <title>
+|       "X"
+|   <body>
+
+#data
+<!doctype html></head><title>X</title>
+#errors
+(1,29): unexpected-start-tag-out-of-my-head
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <title>
+|       "X"
+|   <body>
+
+#data
+<!doctype html></head><base>X
+#errors
+(1,28): unexpected-start-tag-out-of-my-head
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <base>
+|   <body>
+|     "X"
+
+#data
+<!doctype html></head><basefont>X
+#errors
+(1,32): unexpected-start-tag-out-of-my-head
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <basefont>
+|   <body>
+|     "X"
+
+#data
+<!doctype html></head><bgsound>X
+#errors
+(1,31): unexpected-start-tag-out-of-my-head
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|     <bgsound>
+|   <body>
+|     "X"
+
+#data
+<!doctype html><table><meta></table>
+#errors
+(1,28): unexpected-start-tag-implies-table-voodoo
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <meta>
+|     <table>
+
+#data
+<!doctype html><table>X<tr><td><table> <meta></table></table>
+#errors
+unexpected text in table
+(1,45): unexpected-start-tag-implies-table-voodoo
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     "X"
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             <meta>
+|             <table>
+|               " "
+
+#data
+<!doctype html><html> <head>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+
+#data
+<!doctype html> <head>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+
+#data
+<!doctype html><table><style> <tr>x </style> </table>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <style>
+|         " <tr>x "
+|       " "
+
+#data
+<!doctype html><table><TBODY><script> <tr>x </script> </table>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <script>
+|           " <tr>x "
+|         " "
+
+#data
+<!doctype html><p><applet><p>X</p></applet>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <applet>
+|         <p>
+|           "X"
+
+#data
+<!doctype html><p><object type="application/x-non-existant-plugin"><p>X</p></object>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <object>
+|         type="application/x-non-existant-plugin"
+|         <p>
+|           "X"
+
+#data
+<!doctype html><listing>
+X</listing>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <listing>
+|       "X"
+
+#data
+<!doctype html><select><input>X
+#errors
+1:32: ERROR: Premature end of file. Currently open tags: html, body, select.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|     <input>
+|     "X"
+
+#data
+<!doctype html><select><select>X
+#errors
+1:24: ERROR: Start tag 'select' isn't allowed here. Currently open tags: html, body, select.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|     "X"
+
+#data
+<!doctype html><table><input type=hidDEN></table>
+#errors
+(1,41): unexpected-hidden-input-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <input>
+|         type="hidDEN"
+
+#data
+<!doctype html><table>X<input type=hidDEN></table>
+#errors
+(1,23): foster-parenting-character
+(1,42): unexpected-hidden-input-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     "X"
+|     <table>
+|       <input>
+|         type="hidDEN"
+
+#data
+<!doctype html><table>  <input type=hidDEN></table>
+#errors
+(1,43): unexpected-hidden-input-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       "  "
+|       <input>
+|         type="hidDEN"
+
+#data
+<!doctype html><table>  <input type='hidDEN'></table>
+#errors
+(1,45): unexpected-hidden-input-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       "  "
+|       <input>
+|         type="hidDEN"
+
+#data
+<!doctype html><table><input type=" hidden"><input type=hidDEN></table>
+#errors
+(1,44): unexpected-start-tag-implies-table-voodoo
+(1,63): unexpected-hidden-input-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <input>
+|       type=" hidden"
+|     <table>
+|       <input>
+|         type="hidDEN"
+
+#data
+<!doctype html><table><select>X<tr>
+#errors
+(1,30): unexpected-start-tag-implies-table-voodoo
+(1,35): unexpected-table-element-start-tag-in-select-in-table
+(1,35): eof-in-table
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       "X"
+|     <table>
+|       <tbody>
+|         <tr>
+
+#data
+<!doctype html><select>X</select>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       "X"
+
+#data
+<!DOCTYPE hTmL><html></html>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+
+#data
+<!DOCTYPE HTML><html></html>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+
+#data
+<body>X</body></body>
+#errors
+(1,21): unexpected-end-tag-after-body
+#document-fragment
+html
+#document
+| <head>
+| <body>
+|   "X"
+
+#data
+<div><p>a</x> b
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,13): unexpected-end-tag
+(1,15): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       <p>
+|         "a b"
+
+#data
+<table><tr><td><code></code> </table>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             <code>
+|             " "
+
+#data
+<table><b><tr><td>aaa</td></tr>bbb</table>ccc
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,10): foster-parenting-start-tag
+(1,32): foster-parenting-character
+(1,33): foster-parenting-character
+(1,34): foster-parenting-character
+(1,45): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <b>
+|     <b>
+|       "bbb"
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             "aaa"
+|     <b>
+|       "ccc"
+
+#data
+A<table><tr> B</tr> B</table>
+#errors
+(1,1): expected-doctype-but-got-chars
+(1,13): foster-parenting-character
+(1,14): foster-parenting-character
+(1,20): foster-parenting-character
+(1,21): foster-parenting-character
+#document
+| <html>
+|   <head>
+|   <body>
+|     "A B B"
+|     <table>
+|       <tbody>
+|         <tr>
+
+#data
+A<table><tr> B</tr> </em>C</table>
+#errors
+(1,1): expected-doctype-but-got-chars
+(1,13): foster-parenting-character
+(1,14): foster-parenting-character
+(1,25): unexpected-end-tag
+(1,25): unexpected-end-tag-in-special-element
+(1,26): foster-parenting-character
+#document
+| <html>
+|   <head>
+|   <body>
+|     "A BC"
+|     <table>
+|       <tbody>
+|         <tr>
+|         " "
+
+#data
+<select><keygen>
+#errors
+1:1: ERROR: Expected a doctype token
+1:17: ERROR: Premature end of file. Currently open tags: html, body, select.
+#document
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <keygen>
diff --git a/tests/data/tree-construction/tests8.dat b/tests/data/tree-construction/tests8.dat
new file mode 100644
index 00000000..d532801e
--- /dev/null
+++ b/tests/data/tree-construction/tests8.dat
@@ -0,0 +1,165 @@
+#data
+<div>
+<div></div>
+</span>x
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(3,7): unexpected-end-tag
+(3,8): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       "
+"
+|       <div>
+|       "
+x"
+
+#data
+<div>x<div></div>
+</span>x
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(2,7): unexpected-end-tag
+(2,8): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       "x"
+|       <div>
+|       "
+x"
+
+#data
+<div>x<div></div>x</span>x
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,25): unexpected-end-tag
+(1,26): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       "x"
+|       <div>
+|       "xx"
+
+#data
+<div>x<div></div>y</span>z
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,25): unexpected-end-tag
+(1,26): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       "x"
+|       <div>
+|       "yz"
+
+#data
+<table><div>x<div></div>x</span>x
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,12): foster-parenting-start-tag
+(1,13): foster-parenting-character
+(1,18): foster-parenting-start-tag
+(1,24): foster-parenting-end-tag
+(1,25): foster-parenting-start-tag
+(1,32): foster-parenting-end-tag
+(1,32): unexpected-end-tag
+(1,33): foster-parenting-character
+(1,33): eof-in-table
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       "x"
+|       <div>
+|       "xx"
+|     <table>
+
+#data
+<table><li><li></table>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,11): foster-parenting-start-tag
+(1,15): foster-parenting-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <li>
+|     <li>
+|     <table>
+
+#data
+x<table>x
+#errors
+(1,1): expected-doctype-but-got-chars
+(1,9): foster-parenting-character
+(1,9): eof-in-table
+#document
+| <html>
+|   <head>
+|   <body>
+|     "xx"
+|     <table>
+
+#data
+x<table><table>x
+#errors
+(1,1): expected-doctype-but-got-chars
+(1,15): unexpected-start-tag-implies-end-tag
+(1,16): foster-parenting-character
+(1,16): eof-in-table
+#document
+| <html>
+|   <head>
+|   <body>
+|     "x"
+|     <table>
+|     "x"
+|     <table>
+
+#data
+<b>a<div></div><div></b>y
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,24): adoption-agency-1.3
+(1,25): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <b>
+|       "a"
+|       <div>
+|     <div>
+|       <b>
+|       "y"
+
+#data
+<a><div><p></a>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,15): adoption-agency-1.3
+(1,15): adoption-agency-1.3
+(1,15): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <a>
+|     <div>
+|       <a>
+|       <p>
+|         <a>
diff --git a/tests/data/tree-construction/tests9.dat b/tests/data/tree-construction/tests9.dat
new file mode 100644
index 00000000..1456324f
--- /dev/null
+++ b/tests/data/tree-construction/tests9.dat
@@ -0,0 +1,482 @@
+#data
+<!DOCTYPE html><math></math>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+
+#data
+<!DOCTYPE html><body><math></math>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+
+#data
+<!DOCTYPE html><math><mi>
+#errors
+(1,25) expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math mi>
+
+#data
+<!DOCTYPE html><math><annotation-xml><svg><u>
+#errors
+(1,45) unexpected-html-element-in-foreign-content
+(1,45) expected-closing-tag-but-got-eof
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math annotation-xml>
+|         <svg svg>
+|     <u>
+
+#data
+<!DOCTYPE html><body><select><math></math></select>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <math math>
+
+#data
+<!DOCTYPE html><body><select><option><math></math></option></select>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <option>
+|         <math math>
+
+#data
+<!DOCTYPE html><body><table><math></math></table>
+#errors
+(1,34) unexpected-start-tag-implies-table-voodoo
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|     <table>
+
+#data
+<!DOCTYPE html><body><table><math><mi>foo</mi></math></table>
+#errors
+(1,34) foster-parenting-start-token
+(1,39) foster-parenting-character
+(1,40) foster-parenting-character
+(1,41) foster-parenting-character
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math mi>
+|         "foo"
+|     <table>
+
+#data
+<!DOCTYPE html><body><table><math><mi>foo</mi><mi>bar</mi></math></table>
+#errors
+(1,34) foster-parenting-start-tag
+(1,39) foster-parenting-character
+(1,40) foster-parenting-character
+(1,41) foster-parenting-character
+(1,51) foster-parenting-character
+(1,52) foster-parenting-character
+(1,53) foster-parenting-character
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math mi>
+|         "foo"
+|       <math mi>
+|         "bar"
+|     <table>
+
+#data
+<!DOCTYPE html><body><table><tbody><math><mi>foo</mi><mi>bar</mi></math></tbody></table>
+#errors
+(1,41) foster-parenting-start-tag
+(1,46) foster-parenting-character
+(1,47) foster-parenting-character
+(1,48) foster-parenting-character
+(1,58) foster-parenting-character
+(1,59) foster-parenting-character
+(1,60) foster-parenting-character
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math mi>
+|         "foo"
+|       <math mi>
+|         "bar"
+|     <table>
+|       <tbody>
+
+#data
+<!DOCTYPE html><body><table><tbody><tr><math><mi>foo</mi><mi>bar</mi></math></tr></tbody></table>
+#errors
+(1,45) foster-parenting-start-tag
+(1,50) foster-parenting-character
+(1,51) foster-parenting-character
+(1,52) foster-parenting-character
+(1,62) foster-parenting-character
+(1,63) foster-parenting-character
+(1,64) foster-parenting-character
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math mi>
+|         "foo"
+|       <math mi>
+|         "bar"
+|     <table>
+|       <tbody>
+|         <tr>
+
+#data
+<!DOCTYPE html><body><table><tbody><tr><td><math><mi>foo</mi><mi>bar</mi></math></td></tr></tbody></table>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             <math math>
+|               <math mi>
+|                 "foo"
+|               <math mi>
+|                 "bar"
+
+#data
+<!DOCTYPE html><body><table><tbody><tr><td><math><mi>foo</mi><mi>bar</mi></math><p>baz</td></tr></tbody></table>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             <math math>
+|               <math mi>
+|                 "foo"
+|               <math mi>
+|                 "bar"
+|             <p>
+|               "baz"
+
+#data
+<!DOCTYPE html><body><table><caption><math><mi>foo</mi><mi>bar</mi></math><p>baz</caption></table>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <caption>
+|         <math math>
+|           <math mi>
+|             "foo"
+|           <math mi>
+|             "bar"
+|         <p>
+|           "baz"
+
+#data
+<!DOCTYPE html><body><table><caption><math><mi>foo</mi><mi>bar</mi><p>baz</table><p>quux
+#errors
+(1,70) unexpected-html-element-in-foreign-content
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <caption>
+|         <math math>
+|           <math mi>
+|             "foo"
+|           <math mi>
+|             "bar"
+|         <p>
+|           "baz"
+|     <p>
+|       "quux"
+
+#data
+<!DOCTYPE html><body><table><caption><math><mi>foo</mi><mi>bar</mi>baz</table><p>quux
+#errors
+(1,78) unexpected-end-tag
+(1,78) expected-one-end-tag-but-got-another
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <caption>
+|         <math math>
+|           <math mi>
+|             "foo"
+|           <math mi>
+|             "bar"
+|           "baz"
+|     <p>
+|       "quux"
+
+#data
+<!DOCTYPE html><body><table><colgroup><math><mi>foo</mi><mi>bar</mi><p>baz</table><p>quux
+#errors
+(1,44) foster-parenting-start-tag
+(1,49) foster-parenting-character
+(1,50) foster-parenting-character
+(1,51) foster-parenting-character
+(1,61) foster-parenting-character
+(1,62) foster-parenting-character
+(1,63) foster-parenting-character
+(1,71) unexpected-html-element-in-foreign-content
+(1,71) foster-parenting-start-tag
+(1,63) foster-parenting-character
+(1,63) foster-parenting-character
+(1,63) foster-parenting-character
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math mi>
+|         "foo"
+|       <math mi>
+|         "bar"
+|     <p>
+|       "baz"
+|     <table>
+|       <colgroup>
+|     <p>
+|       "quux"
+
+#data
+<!DOCTYPE html><body><table><tr><td><select><math><mi>foo</mi><mi>bar</mi><p>baz</table><p>quux
+#errors
+1:75: ERROR: Start tag 'p' isn't allowed here. Currently open tags: html, body, table, tbody, tr, td, select, math.
+1:81: ERROR: End tag 'table' isn't allowed here. Currently open tags: html, body, table, tbody, tr, td, select.
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             <select>
+|               <math math>
+|                 <math mi>
+|                   "foo"
+|                 <math mi>
+|                   "bar"
+|               <p>
+|                 "baz"
+|     <p>
+|       "quux"
+
+#data
+<!DOCTYPE html><body><table><select><math><mi>foo</mi><mi>bar</mi><p>baz</table><p>quux
+#errors
+1:29: ERROR: Start tag 'select' isn't allowed here. Currently open tags: html, body, table.
+1:37: ERROR: Start tag 'math' isn't allowed here. Currently open tags: html, body, table, select.
+1:47: ERROR: Character tokens aren't legal here
+1:48: ERROR: Character tokens aren't legal here
+1:49: ERROR: Character tokens aren't legal here
+1:59: ERROR: Character tokens aren't legal here
+1:60: ERROR: Character tokens aren't legal here
+1:61: ERROR: Character tokens aren't legal here
+1:67: ERROR: Start tag 'p' isn't allowed here. Currently open tags: html, body, table, select, math.
+1:67: ERROR: Start tag 'p' isn't allowed here. Currently open tags: html, body, table, select.
+1:70: ERROR: Character tokens aren't legal here
+1:71: ERROR: Character tokens aren't legal here
+1:72: ERROR: Character tokens aren't legal here
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <math math>
+|         <math mi>
+|           "foo"
+|         <math mi>
+|           "bar"
+|       <p>
+|         "baz"
+|     <table>
+|     <p>
+|       "quux"
+
+#data
+<!DOCTYPE html><body></body></html><math><mi>foo</mi><mi>bar</mi><p>baz
+#errors
+(1,41) expected-eof-but-got-start-tag
+(1,68) unexpected-html-element-in-foreign-content
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math mi>
+|         "foo"
+|       <math mi>
+|         "bar"
+|     <p>
+|       "baz"
+
+#data
+<!DOCTYPE html><body></body><math><mi>foo</mi><mi>bar</mi><p>baz
+#errors
+(1,34) unexpected-start-tag-after-body
+(1,61) unexpected-html-element-in-foreign-content
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math mi>
+|         "foo"
+|       <math mi>
+|         "bar"
+|     <p>
+|       "baz"
+
+#data
+<!DOCTYPE html><frameset><math><mi></mi><mi></mi><p><span>
+#errors
+(1,31) unexpected-start-tag-in-frameset
+(1,35) unexpected-start-tag-in-frameset
+(1,40) unexpected-end-tag-in-frameset
+(1,44) unexpected-start-tag-in-frameset
+(1,49) unexpected-end-tag-in-frameset
+(1,52) unexpected-start-tag-in-frameset
+(1,58) unexpected-start-tag-in-frameset
+(1,58) eof-in-frameset
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <frameset>
+
+#data
+<!DOCTYPE html><frameset></frameset><math><mi></mi><mi></mi><p><span>
+#errors
+(1,42) unexpected-start-tag-after-frameset
+(1,46) unexpected-start-tag-after-frameset
+(1,51) unexpected-end-tag-after-frameset
+(1,55) unexpected-start-tag-after-frameset
+(1,60) unexpected-end-tag-after-frameset
+(1,63) unexpected-start-tag-after-frameset
+(1,69) unexpected-start-tag-after-frameset
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <frameset>
+
+#data
+<!DOCTYPE html><body xlink:href=foo><math xlink:href=foo></math>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     xlink:href="foo"
+|     <math math>
+|       xlink href="foo"
+
+#data
+<!DOCTYPE html><body xlink:href=foo xml:lang=en><math><mi xml:lang=en xlink:href=foo></mi></math>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     xlink:href="foo"
+|     xml:lang="en"
+|     <math math>
+|       <math mi>
+|         xlink href="foo"
+|         xml lang="en"
+
+#data
+<!DOCTYPE html><body xlink:href=foo xml:lang=en><math><mi xml:lang=en xlink:href=foo /></math>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     xlink:href="foo"
+|     xml:lang="en"
+|     <math math>
+|       <math mi>
+|         xlink href="foo"
+|         xml lang="en"
+
+#data
+<!DOCTYPE html><body xlink:href=foo xml:lang=en><math><mi xml:lang=en xlink:href=foo />bar</math>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     xlink:href="foo"
+|     xml:lang="en"
+|     <math math>
+|       <math mi>
+|         xlink href="foo"
+|         xml lang="en"
+|       "bar"
diff --git a/tests/data/tree-construction/tests_innerHTML_1.dat b/tests/data/tree-construction/tests_innerHTML_1.dat
new file mode 100644
index 00000000..09e0456f
--- /dev/null
+++ b/tests/data/tree-construction/tests_innerHTML_1.dat
@@ -0,0 +1,844 @@
+#data
+<body><span>
+#errors
+(1,6): unexpected-start-tag
+(1,12): expected-closing-tag-but-got-eof
+#document-fragment
+body
+#document
+| <span>
+
+#data
+<span><body>
+#errors
+(1,12): unexpected-start-tag
+(1,12): expected-closing-tag-but-got-eof
+#document-fragment
+body
+#document
+| <span>
+
+#data
+<span><body>
+#errors
+(1,12): unexpected-start-tag
+(1,12): expected-closing-tag-but-got-eof
+#document-fragment
+div
+#document
+| <span>
+
+#data
+<body><span>
+#errors
+(1,12): expected-closing-tag-but-got-eof
+#document-fragment
+html
+#document
+| <head>
+| <body>
+|   <span>
+
+#data
+<frameset><span>
+#errors
+(1,10): unexpected-start-tag
+(1,16): expected-closing-tag-but-got-eof
+#document-fragment
+body
+#document
+| <span>
+
+#data
+<span><frameset>
+#errors
+(1,16): unexpected-start-tag
+(1,16): expected-closing-tag-but-got-eof
+#document-fragment
+body
+#document
+| <span>
+
+#data
+<span><frameset>
+#errors
+(1,16): unexpected-start-tag
+(1,16): expected-closing-tag-but-got-eof
+#document-fragment
+div
+#document
+| <span>
+
+#data
+<frameset><span>
+#errors
+(1,16): unexpected-start-tag-in-frameset
+(1,16): eof-in-frameset
+#document-fragment
+html
+#document
+| <head>
+| <frameset>
+
+#data
+<table><tr>
+#errors
+(1,7): unexpected-start-tag
+#document-fragment
+table
+#document
+| <tbody>
+|   <tr>
+
+#data
+</table><tr>
+#errors
+(1,8): unexpected-end-tag
+#document-fragment
+table
+#document
+| <tbody>
+|   <tr>
+
+#data
+<a>
+#errors
+(1,3): unexpected-start-tag-implies-table-voodoo
+(1,3): eof-in-table
+#document-fragment
+table
+#document
+| <a>
+
+#data
+<a><caption>a
+#errors
+(1,3): unexpected-start-tag-implies-table-voodoo
+(1,13): expected-closing-tag-but-got-eof
+#document-fragment
+table
+#document
+| <a>
+| <caption>
+|   "a"
+
+#data
+<a><colgroup><col>
+#errors
+(1,3): foster-parenting-start-token
+(1,18): expected-closing-tag-but-got-eof
+#document-fragment
+table
+#document
+| <a>
+| <colgroup>
+|   <col>
+
+#data
+<a><tbody><tr>
+#errors
+(1,3): foster-parenting-start-tag
+#document-fragment
+table
+#document
+| <a>
+| <tbody>
+|   <tr>
+
+#data
+<a><tfoot><tr>
+#errors
+(1,3): foster-parenting-start-tag
+#document-fragment
+table
+#document
+| <a>
+| <tfoot>
+|   <tr>
+
+#data
+<a><thead><tr>
+#errors
+(1,3): foster-parenting-start-tag
+#document-fragment
+table
+#document
+| <a>
+| <thead>
+|   <tr>
+
+#data
+<a><tr>
+#errors
+(1,3): foster-parenting-start-tag
+#document-fragment
+table
+#document
+| <a>
+| <tbody>
+|   <tr>
+
+#data
+<a><th>
+#errors
+(1,3): unexpected-start-tag-implies-table-voodoo
+(1,7): unexpected-cell-in-table-body
+#document-fragment
+table
+#document
+| <a>
+| <tbody>
+|   <tr>
+|     <th>
+
+#data
+<a><td>
+#errors
+(1,3): unexpected-start-tag-implies-table-voodoo
+(1,7): unexpected-cell-in-table-body
+#document-fragment
+table
+#document
+| <a>
+| <tbody>
+|   <tr>
+|     <td>
+
+#data
+<table></table><tbody>
+#errors
+(1,22): unexpected-start-tag
+#document-fragment
+caption
+#document
+| <table>
+
+#data
+</table><span>
+#errors
+(1,8): unexpected-end-tag
+(1,14): expected-closing-tag-but-got-eof
+#document-fragment
+caption
+#document
+| <span>
+
+#data
+<span></table>
+#errors
+(1,14): unexpected-end-tag
+(1,14): expected-closing-tag-but-got-eof
+#document-fragment
+caption
+#document
+| <span>
+
+#data
+</caption><span>
+#errors
+(1,10): XXX-undefined-error
+(1,16): expected-closing-tag-but-got-eof
+#document-fragment
+caption
+#document
+| <span>
+
+#data
+<span></caption><span>
+#errors
+(1,16): XXX-undefined-error
+(1,22): expected-closing-tag-but-got-eof
+#document-fragment
+caption
+#document
+| <span>
+|   <span>
+
+#data
+<span><caption><span>
+#errors
+(1,15): unexpected-start-tag
+(1,21): expected-closing-tag-but-got-eof
+#document-fragment
+caption
+#document
+| <span>
+|   <span>
+
+#data
+<span><col><span>
+#errors
+(1,11): unexpected-start-tag
+(1,17): expected-closing-tag-but-got-eof
+#document-fragment
+caption
+#document
+| <span>
+|   <span>
+
+#data
+<span><colgroup><span>
+#errors
+(1,16): unexpected-start-tag
+(1,22): expected-closing-tag-but-got-eof
+#document-fragment
+caption
+#document
+| <span>
+|   <span>
+
+#data
+<span><html><span>
+#errors
+(1,12): non-html-root
+(1,18): expected-closing-tag-but-got-eof
+#document-fragment
+caption
+#document
+| <span>
+|   <span>
+
+#data
+<span><tbody><span>
+#errors
+(1,13): unexpected-start-tag
+(1,19): expected-closing-tag-but-got-eof
+#document-fragment
+caption
+#document
+| <span>
+|   <span>
+
+#data
+<span><td><span>
+#errors
+(1,10): unexpected-start-tag
+(1,16): expected-closing-tag-but-got-eof
+#document-fragment
+caption
+#document
+| <span>
+|   <span>
+
+#data
+<span><tfoot><span>
+#errors
+(1,13): unexpected-start-tag
+(1,19): expected-closing-tag-but-got-eof
+#document-fragment
+caption
+#document
+| <span>
+|   <span>
+
+#data
+<span><thead><span>
+#errors
+(1,13): unexpected-start-tag
+(1,19): expected-closing-tag-but-got-eof
+#document-fragment
+caption
+#document
+| <span>
+|   <span>
+
+#data
+<span><th><span>
+#errors
+(1,10): unexpected-start-tag
+(1,16): expected-closing-tag-but-got-eof
+#document-fragment
+caption
+#document
+| <span>
+|   <span>
+
+#data
+<span><tr><span>
+#errors
+(1,10): unexpected-start-tag
+(1,16): expected-closing-tag-but-got-eof
+#document-fragment
+caption
+#document
+| <span>
+|   <span>
+
+#data
+<span></table><span>
+#errors
+(1,14): unexpected-end-tag
+(1,20): expected-closing-tag-but-got-eof
+#document-fragment
+caption
+#document
+| <span>
+|   <span>
+
+#data
+</colgroup><col>
+#errors
+(1,11): XXX-undefined-error
+#document-fragment
+colgroup
+#document
+| <col>
+
+#data
+<a><col>
+#errors
+(1,3): XXX-undefined-error
+#document-fragment
+colgroup
+#document
+| <col>
+
+#data
+<caption><a>
+#errors
+(1,9): XXX-undefined-error
+(1,12): unexpected-start-tag-implies-table-voodoo
+(1,12): eof-in-table
+#document-fragment
+tbody
+#document
+| <a>
+
+#data
+<col><a>
+#errors
+(1,5): XXX-undefined-error
+(1,8): unexpected-start-tag-implies-table-voodoo
+(1,8): eof-in-table
+#document-fragment
+tbody
+#document
+| <a>
+
+#data
+<colgroup><a>
+#errors
+(1,10): XXX-undefined-error
+(1,13): unexpected-start-tag-implies-table-voodoo
+(1,13): eof-in-table
+#document-fragment
+tbody
+#document
+| <a>
+
+#data
+<tbody><a>
+#errors
+(1,7): XXX-undefined-error
+(1,10): unexpected-start-tag-implies-table-voodoo
+(1,10): eof-in-table
+#document-fragment
+tbody
+#document
+| <a>
+
+#data
+<tfoot><a>
+#errors
+(1,7): XXX-undefined-error
+(1,10): unexpected-start-tag-implies-table-voodoo
+(1,10): eof-in-table
+#document-fragment
+tbody
+#document
+| <a>
+
+#data
+<thead><a>
+#errors
+(1,7): XXX-undefined-error
+(1,10): unexpected-start-tag-implies-table-voodoo
+(1,10): eof-in-table
+#document-fragment
+tbody
+#document
+| <a>
+
+#data
+</table><a>
+#errors
+(1,8): XXX-undefined-error
+(1,11): unexpected-start-tag-implies-table-voodoo
+(1,11): eof-in-table
+#document-fragment
+tbody
+#document
+| <a>
+
+#data
+<a><tr>
+#errors
+(1,3): unexpected-start-tag-implies-table-voodoo
+#document-fragment
+tbody
+#document
+| <a>
+| <tr>
+
+#data
+<a><td>
+#errors
+(1,3): unexpected-start-tag-implies-table-voodoo
+(1,7): unexpected-cell-in-table-body
+#document-fragment
+tbody
+#document
+| <a>
+| <tr>
+|   <td>
+
+#data
+<td><table><tbody><a><tr>
+#errors
+(1,4): unexpected-cell-in-table-body
+(1,21): unexpected-start-tag-implies-table-voodoo
+(1,25): eof-in-table
+#document-fragment
+tbody
+#document
+| <tr>
+|   <td>
+|     <a>
+|     <table>
+|       <tbody>
+|         <tr>
+
+#data
+</tr><td>
+#errors
+(1,5): XXX-undefined-error
+#document-fragment
+tr
+#document
+| <td>
+
+#data
+<td><table><a><tr></tr><tr>
+#errors
+(1,14): unexpected-start-tag-implies-table-voodoo
+(1,27): eof-in-table
+#document-fragment
+tr
+#document
+| <td>
+|   <a>
+|   <table>
+|     <tbody>
+|       <tr>
+|       <tr>
+
+#data
+<caption><td>
+#errors
+(1,9): XXX-undefined-error
+#document-fragment
+tr
+#document
+| <td>
+
+#data
+<col><td>
+#errors
+(1,5): XXX-undefined-error
+#document-fragment
+tr
+#document
+| <td>
+
+#data
+<colgroup><td>
+#errors
+(1,10): XXX-undefined-error
+#document-fragment
+tr
+#document
+| <td>
+
+#data
+<tbody><td>
+#errors
+(1,7): XXX-undefined-error
+#document-fragment
+tr
+#document
+| <td>
+
+#data
+<tfoot><td>
+#errors
+(1,7): XXX-undefined-error
+#document-fragment
+tr
+#document
+| <td>
+
+#data
+<thead><td>
+#errors
+(1,7): XXX-undefined-error
+#document-fragment
+tr
+#document
+| <td>
+
+#data
+<tr><td>
+#errors
+(1,4): XXX-undefined-error
+#document-fragment
+tr
+#document
+| <td>
+
+#data
+</table><td>
+#errors
+(1,8): XXX-undefined-error
+#document-fragment
+tr
+#document
+| <td>
+
+#data
+<td><table></table><td>
+#errors
+#document-fragment
+tr
+#document
+| <td>
+|   <table>
+| <td>
+
+#data
+<caption><a>
+#errors
+(1,9): XXX-undefined-error
+(1,12): expected-closing-tag-but-got-eof
+#document-fragment
+td
+#document
+| <a>
+
+#data
+<col><a>
+#errors
+(1,5): XXX-undefined-error
+(1,8): expected-closing-tag-but-got-eof
+#document-fragment
+td
+#document
+| <a>
+
+#data
+<colgroup><a>
+#errors
+(1,10): XXX-undefined-error
+(1,13): expected-closing-tag-but-got-eof
+#document-fragment
+td
+#document
+| <a>
+
+#data
+<tbody><a>
+#errors
+(1,7): XXX-undefined-error
+(1,10): expected-closing-tag-but-got-eof
+#document-fragment
+td
+#document
+| <a>
+
+#data
+<tfoot><a>
+#errors
+(1,7): XXX-undefined-error
+(1,10): expected-closing-tag-but-got-eof
+#document-fragment
+td
+#document
+| <a>
+
+#data
+<th><a>
+#errors
+(1,4): XXX-undefined-error
+(1,7): expected-closing-tag-but-got-eof
+#document-fragment
+td
+#document
+| <a>
+
+#data
+<thead><a>
+#errors
+(1,7): XXX-undefined-error
+(1,10): expected-closing-tag-but-got-eof
+#document-fragment
+td
+#document
+| <a>
+
+#data
+<tr><a>
+#errors
+(1,4): XXX-undefined-error
+(1,7): expected-closing-tag-but-got-eof
+#document-fragment
+td
+#document
+| <a>
+
+#data
+</table><a>
+#errors
+(1,8): XXX-undefined-error
+(1,11): expected-closing-tag-but-got-eof
+#document-fragment
+td
+#document
+| <a>
+
+#data
+</tbody><a>
+#errors
+(1,8): XXX-undefined-error
+(1,11): expected-closing-tag-but-got-eof
+#document-fragment
+td
+#document
+| <a>
+
+#data
+</td><a>
+#errors
+(1,5): unexpected-end-tag
+(1,8): expected-closing-tag-but-got-eof
+#document-fragment
+td
+#document
+| <a>
+
+#data
+</tfoot><a>
+#errors
+(1,8): XXX-undefined-error
+(1,11): expected-closing-tag-but-got-eof
+#document-fragment
+td
+#document
+| <a>
+
+#data
+</thead><a>
+#errors
+(1,8): XXX-undefined-error
+(1,11): expected-closing-tag-but-got-eof
+#document-fragment
+td
+#document
+| <a>
+
+#data
+</th><a>
+#errors
+(1,5): unexpected-end-tag
+(1,8): expected-closing-tag-but-got-eof
+#document-fragment
+td
+#document
+| <a>
+
+#data
+</tr><a>
+#errors
+(1,5): XXX-undefined-error
+(1,8): expected-closing-tag-but-got-eof
+#document-fragment
+td
+#document
+| <a>
+
+#data
+<table><td><td>
+#errors
+(1,11): unexpected-cell-in-table-body
+(1,15): expected-closing-tag-but-got-eof
+#document-fragment
+td
+#document
+| <table>
+|   <tbody>
+|     <tr>
+|       <td>
+|       <td>
+
+#data
+</select><option>
+#errors
+(1,9): XXX-undefined-error
+#document-fragment
+select
+#document
+| <option>
+
+#data
+<input><option>
+#errors
+(1,7): XXX-undefined-error
+#document-fragment
+select
+#document
+| <option>
+
+#data
+<keygen><option>
+#errors
+#document-fragment
+select
+#document
+| <keygen>
+| <option>
+
+#data
+<textarea><option>
+#errors
+1:19: ERROR: Premature end of file. Currently open tags: html, textarea.
+#document-fragment
+select
+#document
+| <textarea>
+|   "<option>"
+
+#data
+</html><!--abc-->
+#errors
+(1,7): unexpected-end-tag-after-body-innerhtml
+#document-fragment
+html
+#document
+| <head>
+| <body>
+| <!-- abc -->
+
+#data
+</frameset><frame>
+#errors
+(1,11): unexpected-frameset-in-frameset-innerhtml
+#document-fragment
+frameset
+#document
+| <frame>
+
+#data
+#errors
+#document-fragment
+html
+#document
+| <head>
+| <body>
diff --git a/tests/data/tree-construction/tricky01.dat b/tests/data/tree-construction/tricky01.dat
new file mode 100644
index 00000000..753502a2
--- /dev/null
+++ b/tests/data/tree-construction/tricky01.dat
@@ -0,0 +1,336 @@
+#data
+<b><p>Bold </b> Not bold</p>
+Also not bold.
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,15): adoption-agency-1.3
+#document
+| <html>
+|   <head>
+|   <body>
+|     <b>
+|     <p>
+|       <b>
+|         "Bold "
+|       " Not bold"
+|     "
+Also not bold."
+
+#data
+<html>
+<font color=red><i>Italic and Red<p>Italic and Red </font> Just italic.</p> Italic only.</i> Plain
+<p>I should not be red. <font color=red>Red. <i>Italic and red.</p>
+<p>Italic and red. </i> Red.</font> I should not be red.</p>
+<b>Bold <i>Bold and italic</b> Only Italic </i> Plain
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(2,58): adoption-agency-1.3
+(3,67): unexpected-end-tag
+(4,23): adoption-agency-1.3
+(4,35): adoption-agency-1.3
+(5,30): adoption-agency-1.3
+#document
+| <html>
+|   <head>
+|   <body>
+|     <font>
+|       color="red"
+|       <i>
+|         "Italic and Red"
+|     <i>
+|       <p>
+|         <font>
+|           color="red"
+|           "Italic and Red "
+|         " Just italic."
+|       " Italic only."
+|     " Plain
+"
+|     <p>
+|       "I should not be red. "
+|       <font>
+|         color="red"
+|         "Red. "
+|         <i>
+|           "Italic and red."
+|     <font>
+|       color="red"
+|       <i>
+|         "
+"
+|     <p>
+|       <font>
+|         color="red"
+|         <i>
+|           "Italic and red. "
+|         " Red."
+|       " I should not be red."
+|     "
+"
+|     <b>
+|       "Bold "
+|       <i>
+|         "Bold and italic"
+|     <i>
+|       " Only Italic "
+|     " Plain"
+
+#data
+<html><body>
+<p><font size="7">First paragraph.</p>
+<p>Second paragraph.</p></font>
+<b><p><i>Bold and Italic</b> Italic</p>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(2,38): unexpected-end-tag
+(4,28): adoption-agency-1.3
+(4,28): adoption-agency-1.3
+(4,39): unexpected-end-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     "
+"
+|     <p>
+|       <font>
+|         size="7"
+|         "First paragraph."
+|     <font>
+|       size="7"
+|       "
+"
+|       <p>
+|         "Second paragraph."
+|     "
+"
+|     <b>
+|     <p>
+|       <b>
+|         <i>
+|           "Bold and Italic"
+|       <i>
+|         " Italic"
+
+#data
+<html>
+<dl>
+<dt><b>Boo
+<dd>Goo?
+</dl>
+</html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(4,4): end-tag-too-early
+(5,5): end-tag-too-early
+(6,7): expected-one-end-tag-but-got-another
+#document
+| <html>
+|   <head>
+|   <body>
+|     <dl>
+|       "
+"
+|       <dt>
+|         <b>
+|           "Boo
+"
+|       <dd>
+|         <b>
+|           "Goo?
+"
+|     <b>
+|       "
+"
+
+#data
+<html><body>
+<label><a><div>Hello<div>World</div></a></label>  
+</body></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(2,40): adoption-agency-1.3
+(2,48): unexpected-end-tag
+(3,7): expected-one-end-tag-but-got-another
+#document
+| <html>
+|   <head>
+|   <body>
+|     "
+"
+|     <label>
+|       <a>
+|       <div>
+|         <a>
+|           "Hello"
+|           <div>
+|             "World"
+|         "  
+"
+
+#data
+<table><center> <font>a</center> <img> <tr><td> </td> </tr> </table>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,15): foster-parenting-start-tag
+(1,16): foster-parenting-character
+(1,22): foster-parenting-start-tag
+(1,23): foster-parenting-character
+(1,32): foster-parenting-end-tag
+(1,32): end-tag-too-early
+(1,33): foster-parenting-character
+(1,38): foster-parenting-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <center>
+|       " "
+|       <font>
+|         "a"
+|     <font>
+|       <img>
+|       " "
+|     <table>
+|       " "
+|       <tbody>
+|         <tr>
+|           <td>
+|             " "
+|           " "
+|         " "
+
+#data
+<table><tr><p><a><p>You should see this text.
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,14): unexpected-start-tag-implies-table-voodoo
+(1,17): unexpected-start-tag-implies-table-voodoo
+(1,20): unexpected-start-tag-implies-table-voodoo
+(1,20): closing-non-current-p-element
+(1,21): foster-parenting-character
+(1,22): foster-parenting-character
+(1,23): foster-parenting-character
+(1,24): foster-parenting-character
+(1,25): foster-parenting-character
+(1,26): foster-parenting-character
+(1,27): foster-parenting-character
+(1,28): foster-parenting-character
+(1,29): foster-parenting-character
+(1,30): foster-parenting-character
+(1,31): foster-parenting-character
+(1,32): foster-parenting-character
+(1,33): foster-parenting-character
+(1,34): foster-parenting-character
+(1,35): foster-parenting-character
+(1,36): foster-parenting-character
+(1,37): foster-parenting-character
+(1,38): foster-parenting-character
+(1,39): foster-parenting-character
+(1,40): foster-parenting-character
+(1,41): foster-parenting-character
+(1,42): foster-parenting-character
+(1,43): foster-parenting-character
+(1,44): foster-parenting-character
+(1,45): foster-parenting-character
+(1,45): eof-in-table
+#document
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <a>
+|     <p>
+|       <a>
+|         "You should see this text."
+|     <table>
+|       <tbody>
+|         <tr>
+
+#data
+<TABLE>
+<TR>
+<CENTER><CENTER><TD></TD></TR><TR>
+<FONT>
+<TABLE><tr></tr></TABLE>
+</P>
+<a></font><font></a>
+This page contains an insanely badly-nested tag sequence.
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(3,8): unexpected-start-tag-implies-table-voodoo
+(3,16): unexpected-start-tag-implies-table-voodoo
+(4,6): unexpected-start-tag-implies-table-voodoo
+(4,6): unexpected character token in table (the newline)
+(5,7): unexpected-start-tag-implies-end-tag
+(6,4): unexpected p end tag
+(7,10): adoption-agency-1.3
+(7,20): adoption-agency-1.3
+(8,57): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <center>
+|       <center>
+|     <font>
+|       "
+"
+|     <table>
+|       "
+"
+|       <tbody>
+|         <tr>
+|           "
+"
+|           <td>
+|         <tr>
+|           "
+"
+|     <table>
+|       <tbody>
+|         <tr>
+|     <font>
+|       "
+"
+|       <p>
+|       "
+"
+|       <a>
+|     <a>
+|       <font>
+|     <font>
+|       "
+This page contains an insanely badly-nested tag sequence."
+
+#data
+<html>
+<body>
+<b><nobr><div>This text is in a div inside a nobr</nobr>More text that should not be in the nobr, i.e., the
+nobr should have closed the div inside it implicitly. </b><pre>A pre tag outside everything else.</pre>
+</body>
+</html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(3,56): adoption-agency-1.3
+(4,58): adoption-agency-1.3
+(5,7): expected-one-end-tag-but-got-another
+#document
+| <html>
+|   <head>
+|   <body>
+|     "
+"
+|     <b>
+|       <nobr>
+|     <div>
+|       <b>
+|         <nobr>
+|           "This text is in a div inside a nobr"
+|         "More text that should not be in the nobr, i.e., the
+nobr should have closed the div inside it implicitly. "
+|       <pre>
+|         "A pre tag outside everything else."
+|       "
+
+"
diff --git a/tests/data/tree-construction/void-in-phrasing.dat b/tests/data/tree-construction/void-in-phrasing.dat
new file mode 100644
index 00000000..b7dbd1e7
--- /dev/null
+++ b/tests/data/tree-construction/void-in-phrasing.dat
@@ -0,0 +1,151 @@
+#data
+<!DOCTYPE html><body><p><br></p>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <br>
+
+#data
+<!DOCTYPE html><body><p><br>text</p>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <br>
+|       "text"
+
+#data
+<!DOCTYPE html><body><p>before<br>after</p>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       "before"
+|       <br>
+|       "after"
+
+#data
+<!DOCTYPE html><body><p><br><br></p>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <br>
+|       <br>
+
+#data
+<!DOCTYPE html><body><p>a<br>b<br>c</p>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       "a"
+|       <br>
+|       "b"
+|       <br>
+|       "c"
+
+#data
+<!DOCTYPE html><body><h1><br></h1>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <h1>
+|       <br>
+
+#data
+<!DOCTYPE html><body><p><input></p>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <input>
+
+#data
+<!DOCTYPE html><body><p><img></p>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <img>
+
+#data
+<!DOCTYPE html><body><p><wbr></p>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <wbr>
+
+#data
+<!DOCTYPE html><body><p><embed></p>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       <embed>
+
+#data
+<!DOCTYPE html><body><h2><input></h2>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <h2>
+|       <input>
+
+#data
+<!DOCTYPE html><body><em><br></em>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <em>
+|       <br>
+
+#data
+<!DOCTYPE html><body><strong><br>text</strong>
+#errors
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <strong>
+|       <br>
+|       "text"
diff --git a/tests/data/tree-construction/webkit01.dat b/tests/data/tree-construction/webkit01.dat
new file mode 100644
index 00000000..fc7f5c80
--- /dev/null
+++ b/tests/data/tree-construction/webkit01.dat
@@ -0,0 +1,783 @@
+#data
+Test
+#errors
+(1,4): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "Test"
+
+#data
+<div></div>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+
+#data
+<div>Test</div>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       "Test"
+
+#data
+<di
+#errors
+(1,3): eof-in-tag-name
+(1,3): expected-doctype-but-got-eof
+#new-errors
+(1:4) eof-in-tag
+#document
+| <html>
+|   <head>
+|   <body>
+
+#data
+<div>Hello</div>
+<script>
+console.log("PASS");
+</script>
+<div>Bye</div>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       "Hello"
+|     "
+"
+|     <script>
+|       "
+console.log("PASS");
+"
+|     "
+"
+|     <div>
+|       "Bye"
+
+#data
+<div foo="bar">Hello</div>
+#errors
+(1,15): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       foo="bar"
+|       "Hello"
+
+#data
+<div>Hello</div>
+<script>
+console.log("FOO<span>BAR</span>BAZ");
+</script>
+<div>Bye</div>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       "Hello"
+|     "
+"
+|     <script>
+|       "
+console.log("FOO<span>BAR</span>BAZ");
+"
+|     "
+"
+|     <div>
+|       "Bye"
+
+#data
+<foo bar="baz"></foo><potato quack="duck"></potato>
+#errors
+(1,15): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <foo>
+|       bar="baz"
+|     <potato>
+|       quack="duck"
+
+#data
+<foo bar="baz"><potato quack="duck"></potato></foo>
+#errors
+(1,15): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <foo>
+|       bar="baz"
+|       <potato>
+|         quack="duck"
+
+#data
+<foo></foo bar="baz"><potato></potato quack="duck">
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,21): attributes-in-end-tag
+(1,51): attributes-in-end-tag
+#new-errors
+(1:21) end-tag-with-attributes
+(1:51) end-tag-with-attributes
+#document
+| <html>
+|   <head>
+|   <body>
+|     <foo>
+|     <potato>
+
+#data
+</ tttt>
+#errors
+(1,2): expected-closing-tag-but-got-char
+(1,8): expected-doctype-but-got-eof
+#new-errors
+(1:3) invalid-first-character-of-tag-name
+#document
+| <!--  tttt -->
+| <html>
+|   <head>
+|   <body>
+
+#data
+<div FOO ><img><img></div>
+#errors
+(1,10): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       foo=""
+|       <img>
+|       <img>
+
+#data
+<p>Test</p<p>Test2</p>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,13): unexpected-end-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       "TestTest2"
+
+#data
+<rdar://problem/6869687>
+#errors
+(1,7): unexpected-character-after-solidus-in-tag
+(1,8): unexpected-character-after-solidus-in-tag
+(1,16): unexpected-character-after-solidus-in-tag
+(1,24): expected-doctype-but-got-start-tag
+(1,24): expected-closing-tag-but-got-eof
+#new-errors
+(1:8) unexpected-solidus-in-tag
+(1:9) unexpected-solidus-in-tag
+(1:17) unexpected-solidus-in-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <rdar:>
+|       6869687=""
+|       problem=""
+
+#data
+<A>test< /A>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,8): expected-tag-name
+(1,12): expected-closing-tag-but-got-eof
+#new-errors
+(1:9) invalid-first-character-of-tag-name
+#document
+| <html>
+|   <head>
+|   <body>
+|     <a>
+|       "test< /A>"
+
+#data
+&lt;
+#errors
+(1,4): expected-doctype-but-got-chars
+#document
+| <html>
+|   <head>
+|   <body>
+|     "<"
+
+#data
+<body foo='bar'><body foo='baz' yo='mama'>
+#errors
+(1,16): expected-doctype-but-got-start-tag
+(1,42): unexpected-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     foo="bar"
+|     yo="mama"
+
+#data
+<body></br foo="bar"></body>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,21): attributes-in-end-tag
+(1,21): unexpected-end-tag-treated-as
+#new-errors
+(1:21) end-tag-with-attributes
+#document
+| <html>
+|   <head>
+|   <body>
+|     <br>
+
+#data
+<bdy><br foo="bar"></body>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,26): expected-one-end-tag-but-got-another
+#document
+| <html>
+|   <head>
+|   <body>
+|     <bdy>
+|       <br>
+|         foo="bar"
+
+#data
+<body></body></br foo="bar">
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,28): attributes-in-end-tag
+(1,28): unexpected-end-tag-after-body
+(1,28): unexpected-end-tag-treated-as
+#new-errors
+(1:28) end-tag-with-attributes
+#document
+| <html>
+|   <head>
+|   <body>
+|     <br>
+
+#data
+<bdy></body><br foo="bar">
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,12): expected-one-end-tag-but-got-another
+(1,26): unexpected-start-tag-after-body
+(1,26): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <bdy>
+|       <br>
+|         foo="bar"
+
+#data
+<html><body></body></html><!-- Hi there -->
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+| <!--  Hi there  -->
+
+#data
+<html><body></body></html><!-- Comment A --><!-- Comment B --><!-- Comment C --><!-- Comment D --><!-- Comment E -->
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+| <!--  Comment A  -->
+| <!--  Comment B  -->
+| <!--  Comment C  -->
+| <!--  Comment D  -->
+| <!--  Comment E  -->
+
+#data
+<html><body></body></html>x<!-- Hi there -->
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,27): expected-eof-but-got-char
+#document
+| <html>
+|   <head>
+|   <body>
+|     "x"
+|     <!--  Hi there  -->
+
+#data
+<html><body></body></html>x<!-- Hi there --></html><!-- Again -->
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,27): expected-eof-but-got-char
+#document
+| <html>
+|   <head>
+|   <body>
+|     "x"
+|     <!--  Hi there  -->
+| <!--  Again  -->
+
+#data
+<html><body></body></html>x<!-- Hi there --></body></html><!-- Again -->
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,27): expected-eof-but-got-char
+#document
+| <html>
+|   <head>
+|   <body>
+|     "x"
+|     <!--  Hi there  -->
+| <!--  Again  -->
+
+#data
+<html><body></body>
+   <!-- Hi there --></html>
+#errors
+no-doctype
+#document
+| <html>
+|   <head>
+|   <body>
+|     "
+   "
+|   <!--  Hi there  -->
+
+#data
+<html><body></body></html>
+   <!-- Hi there -->
+#errors
+no-doctype
+#document
+| <html>
+|   <head>
+|   <body>
+|     "
+   "
+| <!--  Hi there  -->
+
+#data
+<html><body><ruby><div><rp>xx</rp></div></ruby></body></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,27): XXX-undefined-error
+#document
+| <html>
+|   <head>
+|   <body>
+|     <ruby>
+|       <div>
+|         <rp>
+|           "xx"
+
+#data
+<html><body><ruby><div><rt>xx</rt></div></ruby></body></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,27): XXX-undefined-error
+#document
+| <html>
+|   <head>
+|   <body>
+|     <ruby>
+|       <div>
+|         <rt>
+|           "xx"
+
+#data
+<html><frameset><!--1--><noframes>A</noframes><!--2--></frameset><!--3--><noframes>B</noframes><!--4--></html><!--5--><noframes>C</noframes><!--6-->
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <frameset>
+|     <!-- 1 -->
+|     <noframes>
+|       "A"
+|     <!-- 2 -->
+|   <!-- 3 -->
+|   <noframes>
+|     "B"
+|   <!-- 4 -->
+|   <noframes>
+|     "C"
+| <!-- 5 -->
+| <!-- 6 -->
+
+#data
+<select><option>A<select><option>B<select><option>C<select><option>D<select><option>E<select><option>F<select><option>G<select>
+#errors
+1:1: ERROR: Expected a doctype token
+1:18: ERROR: Start tag 'select' isn't allowed here. Currently open tags: html, body, select, option.
+1:52: ERROR: Start tag 'select' isn't allowed here. Currently open tags: html, body, select, option.
+1:86: ERROR: Start tag 'select' isn't allowed here. Currently open tags: html, body, select, option.
+1:120: ERROR: Start tag 'select' isn't allowed here. Currently open tags: html, body, select, option.
+#document
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <option>
+|         "A"
+|     <option>
+|       "B"
+|       <select>
+|         <option>
+|           "C"
+|     <option>
+|       "D"
+|       <select>
+|         <option>
+|           "E"
+|     <option>
+|       "F"
+|       <select>
+|         <option>
+|           "G"
+
+#data
+<dd><dd><dt><dt><dd><li><li>
+#errors
+(1,4): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <dd>
+|     <dd>
+|     <dt>
+|     <dt>
+|     <dd>
+|       <li>
+|       <li>
+
+#data
+<div><b></div><div><nobr>a<nobr>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,14): end-tag-too-early
+(1,32): unexpected-start-tag-implies-end-tag
+(1,32): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       <b>
+|     <div>
+|       <b>
+|         <nobr>
+|           "a"
+|         <nobr>
+
+#data
+<head></head>
+<body></body>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   "
+"
+|   <body>
+
+#data
+<head></head> <style></style>ddd
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,21): unexpected-start-tag-out-of-my-head
+#document
+| <html>
+|   <head>
+|     <style>
+|   " "
+|   <body>
+|     "ddd"
+
+#data
+<kbd><table></kbd><col><select><tr>
+#errors
+1:1: ERROR: Expected a doctype token
+1:13: ERROR: End tag 'kbd' isn't allowed here. Currently open tags: html, body, kbd, table.
+1:13: ERROR: End tag 'kbd' isn't allowed here. Currently open tags: html, body, kbd, table.
+1:24: ERROR: Start tag 'select' isn't allowed here. Currently open tags: html, body, kbd, table.
+1:36: ERROR: Premature end of file. Currently open tags: html, body, kbd, table, tbody, tr.
+#document
+| <html>
+|   <head>
+|   <body>
+|     <kbd>
+|       <select>
+|       <table>
+|         <colgroup>
+|           <col>
+|         <tbody>
+|           <tr>
+
+#data
+<kbd><table></kbd><col><select><tr></table><div>
+#errors
+1:1: ERROR: Expected a doctype token
+1:13: ERROR: End tag 'kbd' isn't allowed here. Currently open tags: html, body, kbd, table.
+1:13: ERROR: End tag 'kbd' isn't allowed here. Currently open tags: html, body, kbd, table.
+1:24: ERROR: Start tag 'select' isn't allowed here. Currently open tags: html, body, kbd, table.
+1:49: ERROR: Premature end of file. Currently open tags: html, body, kbd, div.
+#document
+| <html>
+|   <head>
+|   <body>
+|     <kbd>
+|       <select>
+|       <table>
+|         <colgroup>
+|           <col>
+|         <tbody>
+|           <tr>
+|       <div>
+
+#data
+<a><li><style></style><title></title></a>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,41): adoption-agency-1.3
+#document
+| <html>
+|   <head>
+|   <body>
+|     <a>
+|     <li>
+|       <a>
+|         <style>
+|         <title>
+
+#data
+<font></p><p><meta><title></title></font>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,10): unexpected-end-tag
+(1,41): adoption-agency-1.3
+#document
+| <html>
+|   <head>
+|   <body>
+|     <font>
+|       <p>
+|     <p>
+|       <font>
+|         <meta>
+|         <title>
+
+#data
+<a><center><title></title><a>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,29): unexpected-start-tag-implies-end-tag
+(1,29): adoption-agency-1.3
+(1,29): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <a>
+|     <center>
+|       <a>
+|         <title>
+|       <a>
+
+#data
+<svg><title><div>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,17): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       <svg title>
+|         <div>
+
+#data
+<svg><title><rect><div>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,23): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       <svg title>
+|         <rect>
+|           <div>
+
+#data
+<svg><title><svg><div>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,22): unexpected-html-element-in-foreign-content
+(1,22): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       <svg title>
+|         <svg svg>
+|         <div>
+
+#data
+<img <="" FAIL>
+#errors
+(1,6): invalid-character-in-attribute-name
+(1,15): expected-doctype-but-got-start-tag
+#new-errors
+(1:6) unexpected-character-in-attribute-name
+#document
+| <html>
+|   <head>
+|   <body>
+|     <img>
+|       <=""
+|       fail=""
+
+#data
+<ul><li><div id='foo'/>A</li><li>B<div>C</div></li></ul>
+#errors
+(1,4): expected-doctype-but-got-start-tag
+(1,23): non-void-element-with-trailing-solidus
+(1,29): end-tag-too-early
+#new-errors
+(1:9-1:24) non-void-html-element-start-tag-with-trailing-solidus
+#document
+| <html>
+|   <head>
+|   <body>
+|     <ul>
+|       <li>
+|         <div>
+|           id="foo"
+|           "A"
+|       <li>
+|         "B"
+|         <div>
+|           "C"
+
+#data
+<svg><em><desc></em>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,9): unexpected-html-element-in-foreign-content
+(1,20): adoption-agency-1.3
+#document
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|     <em>
+|       <desc>
+
+#data
+<table><tr><td><svg><desc><td></desc><circle>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,30): unexpected-start-tag
+(1,37): unexpected-end-tag
+(1,22): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             <svg svg>
+|               <svg desc>
+|           <td>
+|             <circle>
+
+#data
+<svg><tfoot></mi><td>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,17): unexpected-end-tag
+(1,17): unexpected-end-tag
+(1,21): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       <svg tfoot>
+|         <svg td>
+
+#data
+<math><mrow><mrow><mn>1</mn></mrow><mi>a</mi></mrow></math>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       <math mrow>
+|         <math mrow>
+|           <math mn>
+|             "1"
+|         <math mi>
+|           "a"
+
+#data
+<!doctype html><input type="hidden"><frameset>
+#errors
+(1,46): unexpected-start-tag
+(1,46): eof-in-frameset
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <frameset>
+
+#data
+<!doctype html><input type="button"><frameset>
+#errors
+(1,46): unexpected-start-tag
+#document
+| <!DOCTYPE html>
+| <html>
+|   <head>
+|   <body>
+|     <input>
+|       type="button"
diff --git a/tests/data/tree-construction/webkit02.dat b/tests/data/tree-construction/webkit02.dat
new file mode 100644
index 00000000..47a3c571
--- /dev/null
+++ b/tests/data/tree-construction/webkit02.dat
@@ -0,0 +1,775 @@
+#data
+<foo bar=qux/>
+#errors
+(1,14): expected-doctype-but-got-start-tag
+(1,14): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <foo>
+|       bar="qux/"
+
+#data
+<p id="status"><noscript><strong>A</strong></noscript><span>B</span></p>
+#errors
+(1,15): expected-doctype-but-got-start-tag
+#script-on
+#document
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       id="status"
+|       <noscript>
+|         "<strong>A</strong>"
+|       <span>
+|         "B"
+
+#data
+<p id="status"><noscript><strong>A</strong></noscript><span>B</span></p>
+#errors
+(1,15): expected-doctype-but-got-start-tag
+#script-off
+#document
+| <html>
+|   <head>
+|   <body>
+|     <p>
+|       id="status"
+|       <noscript>
+|         <strong>
+|           "A"
+|       <span>
+|         "B"
+
+#data
+<div><sarcasm><div></div></sarcasm></div>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       <sarcasm>
+|         <div>
+
+#data
+<html><body><img src="" border="0" alt="><div>A</div></body></html>
+#errors
+(1,6): expected-doctype-but-got-start-tag
+(1,67): eof-in-attribute-value-double-quote
+#new-errors
+(1:68) eof-in-tag
+#document
+| <html>
+|   <head>
+|   <body>
+
+#data
+<table><td></tbody>A
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,11): unexpected-cell-in-table-body
+(1,20): foster-parenting-character
+(1,20): eof-in-table
+#document
+| <html>
+|   <head>
+|   <body>
+|     "A"
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+
+#data
+<table><td></thead>A
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,11): unexpected-cell-in-table-body
+(1,19): XXX-undefined-error
+(1,20): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             "A"
+
+#data
+<table><td></tfoot>A
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,11): unexpected-cell-in-table-body
+(1,19): XXX-undefined-error
+(1,20): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             "A"
+
+#data
+<table><thead><td></tbody>A
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,18): unexpected-cell-in-table-body
+(1,26): XXX-undefined-error
+(1,27): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <thead>
+|         <tr>
+|           <td>
+|             "A"
+
+#data
+<legend>test</legend>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+#document
+| <html>
+|   <head>
+|   <body>
+|     <legend>
+|       "test"
+
+#data
+<table><input>
+#errors
+(1,7): expected-doctype-but-got-start-tag
+(1,14): foster-parenting-start-tag
+(1,15): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <input>
+|     <table>
+
+#data
+<b><em><dcell><postfield><postfield><postfield><postfield><missing_glyph><missing_glyph><missing_glyph><missing_glyph><hkern><aside></b></em>
+#errors
+unexpected-b-end-tag
+unexpected-em-end-tag
+eof-in-aside
+#document-fragment
+div
+#document
+| <b>
+|   <em>
+|     <dcell>
+|       <postfield>
+|         <postfield>
+|           <postfield>
+|             <postfield>
+|               <missing_glyph>
+|                 <missing_glyph>
+|                   <missing_glyph>
+|                     <missing_glyph>
+|                       <hkern>
+| <aside>
+|   <b>
+
+#data
+<b><em><foo><foo><aside></b>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,28): adoption-agency-9
+(1,29): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <b>
+|       <em>
+|         <foo>
+|           <foo>
+|     <em>
+|       <aside>
+|         <b>
+
+#data
+<b><em><foo><foo><aside></b></em>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,28): adoption-agency-9
+(1,33): adoption-agency-9
+(1,34): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <b>
+|       <em>
+|         <foo>
+|           <foo>
+|     <em>
+|     <aside>
+|       <em>
+|         <b>
+
+#data
+<b><em><foo><foo><foo><aside></b>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,33): adoption-agency-9
+(1,34): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <b>
+|       <em>
+|         <foo>
+|           <foo>
+|             <foo>
+|     <aside>
+|       <b>
+
+#data
+<b><em><foo><foo><foo><aside></b></em>
+#errors
+(1,3): expected-doctype-but-got-start-tag
+(1,33): adoption-agency-9
+(1,38): adoption-agency-9
+(1,39): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <b>
+|       <em>
+|         <foo>
+|           <foo>
+|             <foo>
+|     <aside>
+|       <b>
+
+#data
+<b><em><foo><foo><foo><foo><foo><foo><foo><foo><foo><foo><aside></b></em>
+#errors
+(1,68): adoption-agency-9
+(1,73): adoption-agency-9
+(1,74): expected-closing-tag-but-got-eof
+#document-fragment
+div
+#document
+| <b>
+|   <em>
+|     <foo>
+|       <foo>
+|         <foo>
+|           <foo>
+|             <foo>
+|               <foo>
+|                 <foo>
+|                   <foo>
+|                     <foo>
+|                       <foo>
+| <aside>
+|   <b>
+
+#data
+<b><em><foo><foob><foob><foob><foob><fooc><fooc><fooc><fooc><food><aside></b></em>
+#errors
+(1,77): adoption-agency-9
+(1,82): adoption-agency-9
+(1,83): expected-closing-tag-but-got-eof
+#document-fragment
+div
+#document
+| <b>
+|   <em>
+|     <foo>
+|       <foob>
+|         <foob>
+|           <foob>
+|             <foob>
+|               <fooc>
+|                 <fooc>
+|                   <fooc>
+|                     <fooc>
+|                       <food>
+| <aside>
+|   <b>
+
+#data
+<option><XH<optgroup></optgroup>
+#errors
+1:22: ERROR: End tag 'optgroup' isn't allowed here. Currently open tags: html, option, xh<optgroup.
+1:33: ERROR: Premature end of file. Currently open tags: html, option, xh<optgroup.
+#document-fragment
+select
+#document
+| <option>
+|   <xh<optgroup>
+
+#data
+<svg><foreignObject><div>foo</div><plaintext></foreignObject></svg><div>bar</div>
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,82): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       <svg foreignObject>
+|         <div>
+|           "foo"
+|         <plaintext>
+|           "</foreignObject></svg><div>bar</div>"
+
+#data
+<svg><foreignObject></foreignObject><title></svg>foo
+#errors
+(1,5): expected-doctype-but-got-start-tag
+(1,49): expected-one-end-tag-but-got-another
+#document
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       <svg foreignObject>
+|       <svg title>
+|     "foo"
+
+#data
+</foreignObject><plaintext><div>foo</div>
+#errors
+(1,16): expected-doctype-but-got-end-tag
+(1,16): unexpected-end-tag-before-html
+(1,42): expected-closing-tag-but-got-eof
+#document
+| <html>
+|   <head>
+|   <body>
+|     <plaintext>
+|       "<div>foo</div>"
+
+#data
+<svg xml:base xml:lang xml:space xml:baaah definitionurl>
+#errors
+no-doctype
+eof-in-svg
+#document
+| <html>
+|   <head>
+|   <body>
+|     <svg svg>
+|       definitionurl=""
+|       xml lang=""
+|       xml space=""
+|       xml:baaah=""
+|       xml:base=""
+
+#data
+<math definitionurl xlink:title xlink:show>
+#errors
+no-doctype
+eof-in-math
+#document
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       definitionURL=""
+|       xlink show=""
+|       xlink title=""
+
+#data
+<math DEFINITIONURL>
+#errors
+no-doctype
+eof-in-math
+#document
+| <html>
+|   <head>
+|   <body>
+|     <math math>
+|       definitionURL=""
+
+#data
+<select><hr>
+#errors
+1:1: ERROR: Expected a doctype token
+1:13: ERROR: Premature end of file. Currently open tags: html, body, select.
+#document
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <hr>
+
+#data
+<select><option><hr>
+#errors
+1:1: ERROR: Expected a doctype token
+1:21: ERROR: Premature end of file. Currently open tags: html, body, select.
+#document
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <option>
+|       <hr>
+
+#data
+<select><optgroup><option><hr>
+#errors
+1:1: ERROR: Expected a doctype token
+1:31: ERROR: Premature end of file. Currently open tags: html, body, select.
+#document
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <optgroup>
+|         <option>
+|       <hr>
+
+#data
+<select><optgroup><hr>
+#errors
+1:1: ERROR: Expected a doctype token
+1:23: ERROR: Premature end of file. Currently open tags: html, body, select, optgroup.
+#document
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <optgroup>
+|       <hr>
+
+#data
+<select><option><optgroup><hr>
+#errors
+1:1: ERROR: Expected a doctype token
+1:31: ERROR: Premature end of file. Currently open tags: html, body, select, optgroup.
+#document
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <option>
+|       <optgroup>
+|       <hr>
+
+#data
+<table><tr><td><select><hr>
+#errors
+1:1: ERROR: Expected a doctype token
+1:28: ERROR: Premature end of file. Currently open tags: html, body, table, tbody, tr, td, select.
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             <select>
+|               <hr>
+
+#data
+<table><tr><td><select><option><hr>
+#errors
+1:1: ERROR: Expected a doctype token
+1:36: ERROR: Premature end of file. Currently open tags: html, body, table, tbody, tr, td, select.
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             <select>
+|               <option>
+|               <hr>
+
+#data
+<table><tr><td><select><optgroup><option><hr>
+#errors
+1:1: ERROR: Expected a doctype token
+1:46: ERROR: Premature end of file. Currently open tags: html, body, table, tbody, tr, td, select, optgroup.
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             <select>
+|               <optgroup>
+|                 <option>
+|               <hr>
+
+#data
+<table><tr><td><select><optgroup><hr>
+#errors
+1:1: ERROR: Expected a doctype token
+1:38: ERROR: Premature end of file. Currently open tags: html, body, table, tbody, tr, td, select, optgroup.
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             <select>
+|               <optgroup>
+|               <hr>
+
+#data
+<table><tr><td><select><option><optgroup><hr>
+#errors
+1:1: ERROR: Expected a doctype token
+1:38: ERROR: Premature end of file. Currently open tags: html, body, table, tbody, tr, td, select, optgroup.
+#document
+| <html>
+|   <head>
+|   <body>
+|     <table>
+|       <tbody>
+|         <tr>
+|           <td>
+|             <select>
+|               <option>
+|               <optgroup>
+|               <hr>
+
+#data
+<select><div><i></div><option>option
+#errors
+1:1: ERROR: Expected a doctype token
+1:17: ERROR: End tag 'div' isn't allowed here. Currently open tags: html, body, select, div, i.
+1:37: ERROR: Premature end of file. Currently open tags: html, body, select, option, i.
+#document
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <div>
+|         <i>
+|       <i>
+|         <option>
+|           "option"
+
+#data
+<div><i></div><option>option
+#errors
+1:1: ERROR: Expected a doctype token
+1:9: ERROR: End tag 'div' isn't allowed here. Currently open tags: html, body, div, i.
+1:29: ERROR: Premature end of file. Currently open tags: html, body, i, option.
+#document
+| <html>
+|   <head>
+|   <body>
+|     <div>
+|       <i>
+|     <i>
+|       <option>
+|         "option"
+
+#data
+<select><div>div 1</div><button>button</button><div>div 2</div><datalist><option>option</option></datalist><div>div 3</div></select>
+#errors
+1:1: ERROR: Expected a doctype token
+#document
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <div>
+|         "div 1"
+|       <button>
+|         "button"
+|       <div>
+|         "div 2"
+|       <datalist>
+|         <option>
+|           "option"
+|       <div>
+|         "div 3"
+
+#data
+<select><button>button</select>
+#errors
+1:1: ERROR: Expected a doctype token
+1:23: ERROR: End tag 'select' isn't allowed here. Currently open tags: html, body, select, button.
+#document
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <button>
+|         "button"
+
+#data
+<select><datalist>datalist</select>
+#errors
+1:1: ERROR: Expected a doctype token
+1:27: ERROR: End tag 'select' isn't allowed here. Currently open tags: html, body, select, datalist.
+#document
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <datalist>
+|         "datalist"
+
+#data
+<select><button><select></select></button></select>
+#errors
+1:1: ERROR: Expected a doctype token
+1:17: ERROR: Start tag 'select' isn't allowed here. Currently open tags: html, body, select, button.
+1:25: ERROR: End tag 'select' isn't allowed here. Currently open tags: html, body.
+1:34: ERROR: End tag 'button' isn't allowed here. Currently open tags: html, body.
+1:43: ERROR: End tag 'select' isn't allowed here. Currently open tags: html, body.
+#document
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <button>
+
+#data
+<select><button><div><select></select>
+#errors
+1:1: ERROR: Expected a doctype token
+1:22: ERROR: Start tag 'select' isn't allowed here. Currently open tags: html, body, select, button, div.
+1:30: ERROR: End tag 'select' isn't allowed here. Currently open tags: html, body.
+#document
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <button>
+|         <div>
+
+#data
+<select><div><option><img>option</option></div></select>
+#errors
+1:1: ERROR: Expected a doctype token
+#document
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <div>
+|         <option>
+|           <img>
+|           "option"
+
+#data
+<select><input>
+#errors
+1:1: ERROR: Expected a doctype token
+1:16: ERROR: Premature end of file. Currently open tags: html, body, select.
+#document
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|     <input>
+
+#data
+<select><button><selectedcontent></button><option>X
+#errors
+#document
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <button>
+|         <selectedcontent>
+|           "X"
+|       <option>
+|         "X"
+
+#data
+<select><button><selectedcontent></button><option>x<i>i<b>ib</i>b
+#errors
+#document
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <button>
+|         <selectedcontent>
+|           "x"
+|           <i>
+|             "i"
+|             <b>
+|               "ib"
+|           <b>
+|             "b"
+|       <option>
+|         "x"
+|         <i>
+|           "i"
+|           <b>
+|             "ib"
+|         <b>
+|           "b"
+
+#data
+<select><button><selectedcontent></button><option>X<option>Y
+#errors
+#document
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <button>
+|         <selectedcontent>
+|           "X"
+|       <option>
+|         "X"
+|       <option>
+|         "Y"
+
+#data
+<select><button><selectedcontent></button><option>X<option selected>Y
+#errors
+#document
+| <html>
+|   <head>
+|   <body>
+|     <select>
+|       <button>
+|         <selectedcontent>
+|           "Y"
+|       <option>
+|         "X"
+|       <option>
+|         selected=""
+|         "Y"
+
+#data
+<font><select><option>a</option></font></select>
+#errors
+#document
+| <html>
+|   <head>
+|   <body>
+|     <font>
+|       <select>
+|         <option>
+|           "a"
diff --git a/tests/harness/suites/html5lib_tests/feedback_tests/mod.rs b/tests/harness/suites/html5lib_tests/feedback_tests/mod.rs
index 495d4bb2..8722df07 100644
--- a/tests/harness/suites/html5lib_tests/feedback_tests/mod.rs
+++ b/tests/harness/suites/html5lib_tests/feedback_tests/mod.rs
@@ -64,7 +64,7 @@ pub fn get_test_cases() -> Vec<TestCase> {
         }));
     };
 
-    for_each_test_file("html5lib-tests/tree-construction/*.dat", &mut add_tests);
+    for_each_test_file("tree-construction/*.dat", &mut add_tests);
     for_each_test_file("regression/*.dat", &mut add_tests);
 
     tests
diff --git a/tests/harness/suites/mod.rs b/tests/harness/suites/mod.rs
index 8128aff5..a7da4fb8 100644
--- a/tests/harness/suites/mod.rs
+++ b/tests/harness/suites/mod.rs
@@ -6,7 +6,14 @@ fn data_dir_path(path: &str) -> String {
 }
 
 fn for_each_test_file(path: &str, handler: &mut dyn FnMut(BufReader<File>)) {
-    for path in glob::glob(&data_dir_path(path)).unwrap() {
+    let pattern = data_dir_path(path);
+    let paths: Vec<_> = glob::glob(&pattern).unwrap().collect();
+
+    // An empty match would silently skip the whole suite (e.g. when a submodule update deletes its
+    // files), so we fail instead.
+    assert!(!paths.is_empty(), "no test files match `{pattern}`");
+
+    for path in paths {
         handler(BufReader::new(File::open(path.unwrap()).unwrap()));
     }
 }