Write . for an empty package.json name or version

snapshots/input/empty-package-fields/package.json

@@ -0,0 +1,6 @@
+{
+  "name": "",
+  "version": "1.0.0",
+  "description": "Example TS/JS project with an empty package name",
+  "private": true
+}

snapshots/input/empty-package-fields/src/main.ts

@@ -0,0 +1,3 @@
+export function main(): string {
+  return ''
+}

snapshots/input/empty-package-fields/src/version/lib.ts

@@ -0,0 +1,3 @@
+export function lib(): string {
+  return ''
+}

snapshots/input/empty-package-fields/src/version/package.json

@@ -0,0 +1,4 @@
+{
+  "name": "empty-version",
+  "version": ""
+}

snapshots/output/empty-package-fields/src/main.ts

@@ -0,0 +1,8 @@
+// language TypeScript
+// < definition . 1.0.0 src/`main.ts`/
+
+export function main(): string {
+//              ^^^^ definition . 1.0.0 src/`main.ts`/main().
+  return ''
+}
+

snapshots/output/empty-package-fields/src/version/lib.ts

@@ -0,0 +1,8 @@
+// language TypeScript
+// < definition empty-version . `lib.ts`/
+
+export function lib(): string {
+//              ^^^ definition empty-version . `lib.ts`/lib().
+  return ''
+}
+

src/ScipSymbol.ts

@@ -24,7 +24,11 @@ export class ScipSymbol {
   }
 
   public static package(name: string, version: string): ScipSymbol {
-    return new ScipSymbol(`scip-typescript npm ${name} ${version} `)
+    // SCIP spells an empty package field as `.`, because a double space is an
+    // escaped space.
+    return new ScipSymbol(
+      `scip-typescript npm ${name || '.'} ${version || '.'} `
+    )
   }
 
   public static anonymousPackage(): ScipSymbol {