Review and complete the examples/test chart fixtures

[nulltask]

Summary

Reviewed every fixture in examples/test, fixed the broken ones, added charts for the feature clusters that had none, and made the unit tests read charts from this directory instead of building them inline.

19 of the 36 files there were read by no test, script or doc. That is what let real breakage sit unnoticed.

Fixtures that were broken

• benchmark-command-mix-100.bms parsed to zero events. It opened #SETRANDOM 2 and #RANDOM 2 back to back. Both push a control-flow scope but only one #ENDRANDOM pops one, so the capture stack never drained and all 100 measures of object data were swallowed into the trailing branch — resolving the control flow recovered 3 events out of ~600. The same mistake repeated twice more. Fixed by dropping the redundant scope openers.
• sample.roundtrip.bms was BMSON JSON under a .bms name, byte-identical to sample.roundtrip.bmson. Deleted.
• sample.json, sample.edit.json, sjis-encoding-test.json were stale — they carried a pre-bms/bmson-extension IR shape no current code path can produce. sample.roundtrip.bmson put resolution at the document root instead of inside info and omitted lines. All four regenerated through the editor API.
• lane-order-test.bms and sjis-encoding-test.bms declared #WAV01 test.wav, which does not exist here, so neither chart was playable. Repointed at sample.wav.

Also worth knowing: four-measure-command-combo-test.bms declares #EXWAV01 ex_sample.wav, #EXBMP01 ex_image.bmp, #BGA01 01, #SWBGA01 02 and #WAVCMD legacy — every one of those is rejected by its own value parser in @be-music/chart. That chart's job is proving the parser routes the headers, and it does that well, so it is left alone; the new extended-directives.bms covers valid payloads instead.

New fixtures

One per feature cluster that had none:

Fixture	Covers
extended-directives.bms	#EXWAV / #EXBMP / #ARGB / #BGA / #SWBGA / #WAVCMD / #EXRANK / #CHANGEOPTION with payloads the value parsers accept
scroll-speed-gimmick.bms	one measure per gimmick, including the SP channel and the #SCROLL 0 / #SCROLL < 0 cases the player has a documented compatibility policy for
bus-volume-channels.bms	the 97 / 98 dynamic volume buses
base62-ids.bms	#BASE 62 case-distinct IDs in indexed headers, channel streams, #LNOBJ, and inside a #RANDOM / #IF block
invisible-notes.bms	3x / 4x invisible keysound channels, and that 2P-side invisible channels do not make a single-player chart a DP chart
lntype2-long-note.bms	#LNTYPE 2 continuous runs, including two runs split by a gap and one crossing a measure boundary
nonpositive-bpm.bms	channel 08 pointed at zero, negative and undefined #BPMxx slots
5key-sp.bms, 10key-dp.bms, 7key-longnote.bml	the lane-mode branches with no fixture — with the existing charts this now covers every ChartPlayVariant, and gives the .bml allow-lists a real file to open
bmson-key-channels-mines.bmson	beatoraja key_channels mines, info.ln_type, notes[].t

Tests

packages/parser/src/fixtures.test.ts is the new corpus-level guard: it scans the directory, parses every chart off disk, and requires each one to yield playable events after control-flow resolution. A new fixture is picked up automatically; a broken one fails a test. This is what caught both the benchmark chart and the misnamed round-trip file.

Migrated to fixtures: #SPEED / SP, #BASE 62, and bmson key_channels.

Deliberately left inline: malformed-input probes, charset byte sequences, and table-driven micro-cases such as the 20 resolveChartPlayVariant channel lists — a file per case would hide the assertion. The audio renderer's retrigger tests also keep their hand-built IR, because they are calibrated numeric probes rather than realistic charts.

Orphaned-but-good fixtures are now wired up: the sample.* quintet backs a live import → edit → export round trip in the editor, and the retrigger and ogg charts are rendered through the audio renderer.

examples/test/README.md / README.ja.md index what every chart covers and the conventions a new one should follow.

Notes

• No changeset: tests, fixtures and docs only, nothing consumer-facing.
• ogg-test.wav (247 KB) is the uncompressed source for ogg-test.ogg and is read by no test. Left in place as source material and documented as such rather than deleted.

Test plan

• pnpm test — 1971 passed (was 1940)
• oxlint and oxfmt --check clean on every changed file
• tsc -p tsconfig.typecheck.json clean in parser, editor, audio-renderer, player-tui

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Status	Name	Latest Commit	Updated (UTC)
⚠️ Deployment skipped View logs	be-music-player-demo	48e9b49	Aug 23 2026, 04:37 PM