From cc43796a7c96b5d9839d277713b75b81f35fdcb2 Mon Sep 17 00:00:00 2001 From: dmitrii-f-t27 Date: Fri, 16 Oct 2026 11:37:34 -0300 Subject: [PATCH] spec(port): port the padding ciphertext length class balance guard (Refs #8884) The twenty-ninth W2 target of the CR-CHAT-04 ring tracker: the class-balance rules - the batch ceiling, the record floor, then per record the zero-size probe, the class-index ceiling and the repeated-id scan, then over the whole batch the chi-squared ceiling on the class counts - as the D5 verdict with every payload field, the original's rule order, and all ten PCLB tests transcribed plus helper and rule-order tests. The class counts accumulate in f64 from the start (the int-to-float cast the backends reject), the arithmetic identical for integer counts; PCLB-01 measures exactly sixty, the exact boundary fixture (two, eight, eleven over the last three classes) measures exactly fifteen and passes. The BTreeSet dedup becomes a scan over the visited records. Checks (conventions 0-14): t27b test 12 passed 0 failed; t27c test-report 12/12, 0 vacuous; gen-rust output compiles under rustc; coverage Untested 0; ASCII only; seal saved, all hashes MATCH; --- ...ciphertext_length_class_balance_guard.json | 28 ++ docs/reports/t27b_expectations.json | 1 + ..._ciphertext_length_class_balance_guard.t27 | 401 ++++++++++++++++++ 3 files changed, 430 insertions(+) create mode 100644 .trinity/seals/src_port::trios::crates::trios-chat::rings::CR-CHAT-04::src::padding_ciphertext_length_class_balance_guard.json create mode 100644 specs/port/trios/crates/trios-chat/rings/CR-CHAT-04/src/padding_ciphertext_length_class_balance_guard.t27 diff --git a/.trinity/seals/src_port::trios::crates::trios-chat::rings::CR-CHAT-04::src::padding_ciphertext_length_class_balance_guard.json b/.trinity/seals/src_port::trios::crates::trios-chat::rings::CR-CHAT-04::src::padding_ciphertext_length_class_balance_guard.json new file mode 100644 index 0000000000..bfe719eab0 --- /dev/null +++ b/.trinity/seals/src_port::trios::crates::trios-chat::rings::CR-CHAT-04::src::padding_ciphertext_length_class_balance_guard.json @@ -0,0 +1,28 @@ +{ + "built_by": "t27c-bootstrap@0.5.2+01d0a635f", + "closure": [], + "config": "gen=c,rust,verilog,zig;tests=zig", + "gen_hash_c": "sha256:456fc9ccab722720a2d2620e17077b699b90fb11f593d073e69358366f138937", + "gen_hash_rust": "sha256:662abb07b13ed872013558f4320d5a3cc03c8b88596b51735586afe934263073", + "gen_hash_verilog": "sha256:20a7c9409cf5c11bd22fa2533bba3672e95626e132bb6e3455d33808290c1d5a", + "gen_hash_zig": "sha256:a92fd7b67a632fa0a86f45e1f0226acd981a24ff99f891d5f0cb819112cacfd9", + "module": "port::trios::crates::trios-chat::rings::CR-CHAT-04::src::padding_ciphertext_length_class_balance_guard", + "ring": 12, + "seal_schema": 2, + "sealed_at": "2026-10-16T14:37:10Z", + "sealed_by": "t27c-bootstrap@0.5.2", + "spec_hash": "sha256:beb77569cb57018b5be023cc19fc1bc8dc9d8352f5124a06a9872dd14bda9509", + "spec_path": "specs/port/trios/crates/trios-chat/rings/CR-CHAT-04/src/padding_ciphertext_length_class_balance_guard.t27", + "tests": { + "failed": 0, + "failing": [], + "forced": false, + "passed": 12, + "total": 12, + "vacuous": 0 + }, + "toolchain": { + "test_runner": "sha256:1982ae948e24d00c5d221ccec12dfce1eb01204b53e37b0f857f93b16d64629d", + "zig": "0.16.0" + } +} \ No newline at end of file diff --git a/docs/reports/t27b_expectations.json b/docs/reports/t27b_expectations.json index c041cbab56..5a2c28f572 100644 --- a/docs/reports/t27b_expectations.json +++ b/docs/reports/t27b_expectations.json @@ -853,6 +853,7 @@ {"path": "specs/port/trios/crates/trios-chat/rings/CR-CHAT-02/src/epoch_rollover_wraparound_guard.t27", "t27b": "pass"}, {"path": "specs/port/trios/crates/trios-chat/rings/CR-CHAT-03/src/ratchet_tree_resolution_guard.t27", "t27b": "pass"}, {"path": "specs/port/trios/crates/trios-chat/rings/CR-CHAT-03/src/unmerged_leaves_bound_guard.t27", "t27b": "pass"}, + {"path": "specs/port/trios/crates/trios-chat/rings/CR-CHAT-04/src/padding_ciphertext_length_class_balance_guard.t27", "t27b": "pass"}, {"path": "specs/port/trios/crates/trios-chat/rings/CR-CHAT-05/src/envelope_size_distribution_uniformity.t27", "t27b": "pass"}, {"path": "specs/port/trios/crates/trios-chat/rings/CR-CHAT-07/src/cover_decoy_ratio_governor.t27", "t27b": "pass"}, {"path": "specs/port/trios/crates/trios-chat/rings/CR-CHAT-LAWS/src/lib.t27", "t27b": "pass"}, diff --git a/specs/port/trios/crates/trios-chat/rings/CR-CHAT-04/src/padding_ciphertext_length_class_balance_guard.t27 b/specs/port/trios/crates/trios-chat/rings/CR-CHAT-04/src/padding_ciphertext_length_class_balance_guard.t27 new file mode 100644 index 0000000000..56e2e0f7be --- /dev/null +++ b/specs/port/trios/crates/trios-chat/rings/CR-CHAT-04/src/padding_ciphertext_length_class_balance_guard.t27 @@ -0,0 +1,401 @@ +module port::trios::crates::trios-chat::rings::CR-CHAT-04::src::padding_ciphertext_length_class_balance_guard; + +// Port of gHashTag/trios crates/trios-chat/rings/CR-CHAT-04/src/padding_ciphertext_length_class_balance_guard.rs +// (CR-CHAT-04 - Padding ciphertext length class balance guard, +// Wave-131 Lane B, requirement R-CHAT-4). +// +// Ciphertext must spread evenly over the length classes: the +// most populated class likely holds the real messages, a sparse +// class reads as cover, and the class distribution profile +// fingerprints the user. The rules, in the original's order: the +// batch ceiling, the record floor, then per record the zero-size +// probe, the class-index ceiling and the repeated-id scan, then +// over the whole batch the chi-squared ceiling on the class +// counts. +// +// The original returns Result<(), ClassBalanceError>. This port +// carries the verdict as a named struct (owner decision D5): Ok +// first, then the six error variants in the original's +// declaration order - Imbalanced, TooFew, InvalidClass, +// DuplicateRecordId, ZeroSize, TooMany - with every payload +// field: the measured and ceiling chi-squared for Imbalanced, +// got and min for TooFew, idx, got and max for InvalidClass, idx +// for the id and size rules, and got and max for the ceiling. +// +// The class counts accumulate in f64 from the start (the +// int-to-float cast the backends reject), the arithmetic +// identical for integer counts. The BTreeSet dedup becomes a +// scan over the records already visited. + +// Number of length classes. +pub const PCLB_NUM_CLASSES: usize = 4; + +// Maximum chi-squared statistic. +pub const PCLB_MAX_CHI_SQUARED: f64 = 15.0; + +// Minimum records for chi-squared validity. +pub const PCLB_MIN_RECORDS: usize = 16; + +// Maximum records per batch. +pub const PCLB_MAX_RECORDS: usize = 4096; + +// Record ID length. +pub const PCLB_RECORD_ID_LEN: usize = 32; + +// A ciphertext length class record. +pub struct ClassRecord { + record_id: [32]u8, + class_index: usize, + size: usize, +} + +// Verdict codes: Ok(()) and ClassBalanceError's variants, in declaration order. +pub enum ClassBalanceCode { + Ok, + Imbalanced, + TooFew, + InvalidClass, + DuplicateRecordId, + ZeroSize, + TooMany, +} + +// The verdict of the class balance validation, with every error +// payload field. +pub struct ClassBalanceVerdict { + code: ClassBalanceCode, + idx: usize, + got: usize, + bound: usize, + got_f: f64, + bound_f: f64, +} + +// Whole-form equality over the fixed thirty-two record-id +// bytes. +pub fn record_ids_equal(a: [32]u8, b: [32]u8) -> bool { + for i in 0..32 { + if (a[i] != b[i]) { + return false; + } + } + return true; +} + +// Whether record i repeats an earlier id - the original's +// BTreeSet insert probe, answered by a scan. +pub fn rid_seen_before(records: []const ClassRecord, i: usize) -> bool { + for j in 0..i { + if (record_ids_equal(records[j].record_id, records[i].record_id)) { + return true; + } + } + return false; +} + +// The chi-squared distance of the observed class counts from a +// flat distribution - the original's chi_squared_flat over the +// f64 count table. A zero total answers zero, and so does a +// zero expectation. +pub fn chi_squared_flat(observed: [4]f64) -> f64 { + var total: f64 = 0.0; + for i in 0..4 { + total = total + observed[i]; + } + if (total == 0.0) { + return 0.0; + } + const expected: f64 = total / 4.0; + if (expected == 0.0) { + return 0.0; + } + var chi: f64 = 0.0; + var diff: f64 = 0.0; + for i in 0..4 { + diff = observed[i] - expected; + chi = chi + diff * diff / expected; + } + return chi; +} + +// [VERIFIED] Validate padding ciphertext length class balance. +// Returns Ok only when every rule holds, checked in the +// original's order: the batch ceiling, the record floor, then +// per record the zero size, the class ceiling and the repeated +// id, then the chi-squared ceiling over the class counts. +pub fn validate_class_balance(records: []const ClassRecord) -> ClassBalanceVerdict { + if (records.len > PCLB_MAX_RECORDS) { + return ClassBalanceVerdict { code: ClassBalanceCode.TooMany, idx: 0, got: records.len, bound: PCLB_MAX_RECORDS, got_f: 0.0, bound_f: 0.0, }; + } + if (records.len < PCLB_MIN_RECORDS) { + return ClassBalanceVerdict { code: ClassBalanceCode.TooFew, idx: 0, got: records.len, bound: PCLB_MIN_RECORDS, got_f: 0.0, bound_f: 0.0, }; + } + var counts: [4]f64 = [4]f64{0.0, 0.0, 0.0, 0.0,}; + for i in 0..records.len { + if (records[i].size == 0) { + return ClassBalanceVerdict { code: ClassBalanceCode.ZeroSize, idx: i, got: 0, bound: 0, got_f: 0.0, bound_f: 0.0, }; + } + if (records[i].class_index >= PCLB_NUM_CLASSES) { + return ClassBalanceVerdict { code: ClassBalanceCode.InvalidClass, idx: i, got: records[i].class_index, bound: PCLB_NUM_CLASSES - 1, got_f: 0.0, bound_f: 0.0, }; + } + if (rid_seen_before(records, i)) { + return ClassBalanceVerdict { code: ClassBalanceCode.DuplicateRecordId, idx: i, got: 0, bound: 0, got_f: 0.0, bound_f: 0.0, }; + } + counts[records[i].class_index] = counts[records[i].class_index] + 1.0; + } + const chi: f64 = chi_squared_flat(counts); + if (chi > PCLB_MAX_CHI_SQUARED) { + return ClassBalanceVerdict { code: ClassBalanceCode.Imbalanced, idx: 0, got: 0, bound: 0, got_f: chi, bound_f: PCLB_MAX_CHI_SQUARED, }; + } + return ClassBalanceVerdict { code: ClassBalanceCode.Ok, idx: 0, got: 0, bound: 0, got_f: 0.0, bound_f: 0.0, }; +} + +// The record ids and classes of the fixtures, and the class +// sizes of the balanced batch - the original's helpers, entry by +// entry. +pub const PCLB_SIZES: [4]usize = [4]usize{512, 768, 1024, 1280,}; +pub const PCLB_ID_BYTES_16: [16]u8 = [16]u8{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,}; +pub const PCLB_ID_BYTES_15: [15]u8 = [15]u8{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,}; +pub const PCLB_ID_BYTES_18: [18]u8 = [18]u8{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18,}; +pub const PCLB_ID_BYTES_200: [200]u8 = [200]u8{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200,}; +pub const PCLB_CLASSES_18: [18]usize = [18]usize{0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3,}; +// The class walk of the exact-boundary fixture: two, eight and +// eleven records over the last three classes - a chi-squared of +// exactly fifteen, none in the first class. +pub const PCLB_CLASSES_21: [21]usize = [21]usize{1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,}; +pub const RID_01: [32]u8 = [32]u8{1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,}; +pub const RID_FF: [32]u8 = [32]u8{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,}; +pub const RID_FIRST: [32]u8 = [32]u8{1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,}; +pub const ZERO_RID: [32]u8 = [32]u8{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; + +// The two id bytes of the too-many fixture: the original writes +// the big-endian u64 of i + 1 into id[0..8], and for every value +// in 1..=4097 only the last two of those eight bytes can carry a +// nonzero digit. +pub const PCLB_ID6_4097: [4097]u8 = 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5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 16, 16,}; +pub const PCLB_ID7_4097: [4097]u8 = [4097]u8{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 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132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254, 255, 0, 1,}; + +// **PCLB-01** - imbalanced rejected: twenty records in the first +// class - chi-squared sixty over the ceiling of fifteen. +test pclb_01_imbalanced_rejected { + var records: [20]ClassRecord; + for i in 0..20 { + var id: [32]u8 = [32]u8{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; + id[0] = PCLB_ID_BYTES_200[i]; + records[i] = ClassRecord { record_id: id, class_index: 0, size: 512, }; + } + const v = validate_class_balance(&records); + assert(v.code == ClassBalanceCode.Imbalanced); + assert(v.got_f == 60.0); + assert(v.bound_f == 15.0); +} + +// **PCLB-02** - too few rejected: fifteen records of a required +// sixteen. +test pclb_02_too_few_rejected { + var records: [15]ClassRecord; + for i in 0..15 { + var id: [32]u8 = [32]u8{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; + id[0] = PCLB_ID_BYTES_15[i]; + records[i] = ClassRecord { record_id: id, class_index: i % 4, size: 512, }; + } + const v = validate_class_balance(&records); + assert(v.code == ClassBalanceCode.TooFew); + assert(v.got == 15); + assert(v.bound == 16); +} + +// **PCLB-03** - invalid class rejected: the balanced batch plus +// one record claiming class four of a zero-indexed maximum +// three. +test pclb_03_invalid_class_rejected { + var records: [17]ClassRecord; + for i in 0..16 { + var id: [32]u8 = [32]u8{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; + id[0] = PCLB_ID_BYTES_16[i]; + records[i] = ClassRecord { record_id: id, class_index: i / 4, size: PCLB_SIZES[i / 4], }; + } + records[16] = ClassRecord { record_id: RID_FF, class_index: 4, size: 512, }; + const v = validate_class_balance(&records); + assert(v.code == ClassBalanceCode.InvalidClass); + assert(v.idx == 16); + assert(v.got == 4); + assert(v.bound == 3); +} + +// **PCLB-04** - duplicate record id rejected: the balanced batch +// plus one record repeating the first id. +test pclb_04_duplicate_rejected { + var records: [17]ClassRecord; + for i in 0..16 { + var id: [32]u8 = [32]u8{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; + id[0] = PCLB_ID_BYTES_16[i]; + records[i] = ClassRecord { record_id: id, class_index: i / 4, size: PCLB_SIZES[i / 4], }; + } + records[16] = ClassRecord { record_id: RID_FIRST, class_index: 0, size: 512, }; + const v = validate_class_balance(&records); + assert(v.code == ClassBalanceCode.DuplicateRecordId); + assert(v.idx == 16); +} + +// **PCLB-05** - zero size rejected under a live id. +test pclb_05_zero_size_rejected { + var records: [17]ClassRecord; + for i in 0..16 { + var id: [32]u8 = [32]u8{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; + id[0] = PCLB_ID_BYTES_16[i]; + records[i] = ClassRecord { record_id: id, class_index: i / 4, size: PCLB_SIZES[i / 4], }; + } + records[16] = ClassRecord { record_id: RID_FF, class_index: 0, size: 0, }; + const v = validate_class_balance(&records); + assert(v.code == ClassBalanceCode.ZeroSize); + assert(v.idx == 16); +} + +// **PCLB-06** - too many rejected: 4097 records of a maximum +// 4096, built in a loop like the original's, each id carrying +// the big-endian u64 of its index plus one. The batch rule fires +// before any record is examined. +test pclb_06_too_many_rejected { + var records: [4097]ClassRecord; + for i in 0..4097 { + var id: [32]u8 = [32]u8{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; + id[6] = PCLB_ID6_4097[i]; + id[7] = PCLB_ID7_4097[i]; + records[i] = ClassRecord { record_id: id, class_index: i % 4, size: 512, }; + } + const v = validate_class_balance(&records); + assert(v.code == ClassBalanceCode.TooMany); + assert(v.got == 4097); + assert(v.bound == 4096); +} + +// **PCLB-07** - the balanced batch accepted: four records per +// class, the sizes walking the class ladder. +test pclb_07_balanced_accepted { + var records: [16]ClassRecord; + for i in 0..16 { + var id: [32]u8 = [32]u8{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; + id[0] = PCLB_ID_BYTES_16[i]; + records[i] = ClassRecord { record_id: id, class_index: i / 4, size: PCLB_SIZES[i / 4], }; + } + const v = validate_class_balance(&records); + assert(v.code == ClassBalanceCode.Ok); +} + +// **PCLB-08** - exactly the minimum accepted: sixteen records +// cycling the classes. +test pclb_08_exact_minimum_accepted { + var records: [16]ClassRecord; + for i in 0..16 { + var id: [32]u8 = [32]u8{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; + id[0] = PCLB_ID_BYTES_16[i]; + records[i] = ClassRecord { record_id: id, class_index: i % 4, size: 512, }; + } + const v = validate_class_balance(&records); + assert(v.code == ClassBalanceCode.Ok); +} + +// **PCLB-09** - slight imbalance accepted: six records in the +// first class, four elsewhere - chi-squared of two thirds, well +// under the ceiling. +test pclb_09_slight_imbalance_accepted { + var records: [18]ClassRecord; + for i in 0..18 { + var id: [32]u8 = [32]u8{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; + id[0] = PCLB_ID_BYTES_18[i]; + records[i] = ClassRecord { record_id: id, class_index: PCLB_CLASSES_18[i], size: 512, }; + } + const v = validate_class_balance(&records); + assert(v.code == ClassBalanceCode.Ok); +} + +// **PCLB-10** - a large balanced batch accepted: two hundred +// records cycling the classes. +test pclb_10_large_batch_accepted { + var records: [200]ClassRecord; + for i in 0..200 { + var id: [32]u8 = [32]u8{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; + id[0] = PCLB_ID_BYTES_200[i]; + records[i] = ClassRecord { record_id: id, class_index: i % 4, size: 512, }; + } + const v = validate_class_balance(&records); + assert(v.code == ClassBalanceCode.Ok); +} + +// The three helpers have direct tests (coverage: Untested 0). +test pclb_helpers_answer { + assert(record_ids_equal(RID_01, RID_01)); + assert(!record_ids_equal(RID_01, RID_FF)); + const three: [3]ClassRecord = [3]ClassRecord{ + ClassRecord { record_id: RID_01, class_index: 0, size: 512, }, + ClassRecord { record_id: RID_FF, class_index: 1, size: 512, }, + ClassRecord { record_id: RID_01, class_index: 2, size: 512, }, + }; + assert(!rid_seen_before(&three, 0)); + assert(!rid_seen_before(&three, 1)); + assert(rid_seen_before(&three, 2)); + const flat: [4]f64 = [4]f64{4.0, 4.0, 4.0, 4.0,}; + assert(chi_squared_flat(flat) == 0.0); + const skew: [4]f64 = [4]f64{20.0, 0.0, 0.0, 0.0,}; + assert(chi_squared_flat(skew) == 60.0); + const zeros: [4]f64 = [4]f64{0.0, 0.0, 0.0, 0.0,}; + assert(chi_squared_flat(zeros) == 0.0); +} + +// Rule order is the original's: the record floor before any +// record, the zero size before the class ceiling, the class +// ceiling before the id scan, the id scan before the batch +// chi-squared - and the chi-squared ceiling admitting its exact +// boundary of fifteen. +test rule_order_matches_original { + var short_zero: [15]ClassRecord; + for i in 0..15 { + var id: [32]u8 = [32]u8{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; + id[0] = PCLB_ID_BYTES_15[i]; + short_zero[i] = ClassRecord { record_id: id, class_index: 4, size: 0, }; + } + const v1 = validate_class_balance(&short_zero); + assert(v1.code == ClassBalanceCode.TooFew); + + var zero_invalid: [16]ClassRecord; + for i in 0..16 { + var id: [32]u8 = [32]u8{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; + id[0] = PCLB_ID_BYTES_16[i]; + zero_invalid[i] = ClassRecord { record_id: id, class_index: 4, size: 0, }; + } + const v2 = validate_class_balance(&zero_invalid); + assert(v2.code == ClassBalanceCode.ZeroSize); + assert(v2.idx == 0); + + var invalid_dup: [16]ClassRecord; + for i in 0..15 { + var id: [32]u8 = [32]u8{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; + id[0] = PCLB_ID_BYTES_15[i]; + invalid_dup[i] = ClassRecord { record_id: id, class_index: i % 4, size: 512, }; + } + invalid_dup[15] = ClassRecord { record_id: RID_01, class_index: 4, size: 512, }; + const v3 = validate_class_balance(&invalid_dup); + assert(v3.code == ClassBalanceCode.InvalidClass); + assert(v3.idx == 15); + + var dup_imbalanced: [16]ClassRecord; + for i in 0..15 { + var id: [32]u8 = [32]u8{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; + id[0] = PCLB_ID_BYTES_15[i]; + dup_imbalanced[i] = ClassRecord { record_id: id, class_index: 0, size: 512, }; + } + dup_imbalanced[15] = ClassRecord { record_id: RID_FIRST, class_index: 0, size: 512, }; + const v4 = validate_class_balance(&dup_imbalanced); + assert(v4.code == ClassBalanceCode.DuplicateRecordId); + assert(v4.idx == 15); + + var boundary: [21]ClassRecord; + for i in 0..21 { + var id: [32]u8 = [32]u8{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; + id[0] = PCLB_ID_BYTES_200[i]; + boundary[i] = ClassRecord { record_id: id, class_index: PCLB_CLASSES_21[i], size: 512, }; + } + const v5 = validate_class_balance(&boundary); + assert(v5.code == ClassBalanceCode.Ok); +}