B3 (#175): pin the AAC arm every ordinary conversion takes #185

Merged
JMR-dev merged 2 commits from test/aac-audio-args into main 2026-09-02 04:12:55 +00:00
2 Commits
Author SHA1 Message Date
JMR-devandClaude Opus 5 b41341a1cb B3 (#175): pin the AAC arm every ordinary conversion takes
audioArgs has six arms. Five are named codecs with tests; AAC arrives through the `else`,
so nothing named it -- neither "aac" nor "192k" appeared anywhere in
FFmpegCommandBuilderTest. It is the audio MP4 and M4A get, which is to say the audio the
picker offers first and most conversions produce.

Both halves are asserted, and the bitrate is the half worth arguing for: an -b:a that
quietly changed would fail nothing, look wrong in no command line, and surface only as
files that sound different from the ones the app produced last month. Both mutations
confirmed red -- 192k -> 128k and aac -> libfdk_aac.

Asserted through MP4_H264 and M4A_AAC rather than one of them, so an AAC arm added above
the `else` later has to keep answering the same way for both.

**Deliberately not added here: an ENCODABLE_AUDIO-vs-audioArgs agreement test**, the
obvious companion to VideoCodecMimeAgreementTest. It would freeze the answer to F1, which
is open: ContainerCapabilities.kt:84 says "nothing here emits a Vorbis encoder" and
FFmpegCommandBuilder.kt:188 does. docs/coverage-read-findings.md says in terms that the
tempting fix there locks in the wrong answer and that the decision comes first. This is
the AAC arm only.

563 -> 564 JVM tests, 0 failures. No production code changed.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-09-01 21:50:31 -05:00
JMR-devandClaude Opus 5 0f842243b5 B2 (#174): read what the progress notification actually says
An assertion gap rather than a coverage one, which is the reason it survived. JaCoCo is
green on build()'s `if (indeterminate)` because ProgressNotificationTest drives it through
a real worker -- but that test reads the notification id and EXTRA_PROGRESS and nothing
else. Nothing had ever read the text. Swapping the two branches passed the whole suite;
so did replacing the caller's title with a constant. Both are red now.

What it costs to get wrong is small and permanent: a conversion four minutes in still
saying "Preparing", or one that has not started reporting yet claiming 0%. Neither is a
crash, and nothing else here would have found it.

Nothing in the suite had constructed ConversionNotifications directly, and the reason
turned out to be mechanical rather than an oversight: build() reaches
WorkManager.getInstance for the Cancel action's PendingIntent, so the notification cannot
be built without one. installTestWorkManager in setUp is the whole fixture, and the KDoc
records the coupling so the next person does not rediscover it.

areEnabled() in the same file is deliberately still untested. It has no caller anywhere in
app/src/main, so a test would assert that a function nobody calls returns what the platform
told it -- and would imply the app handles the disabled-notification case, which it does
not. That is F5 in docs/coverage-read-findings.md, and it asks for a decision rather than a
test.

561 -> 563 JVM tests, 0 failures. No production code changed.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-09-01 21:48:36 -05:00