3.0 KiB
PKG-AUDIO-BUFFER-01: observe source switching while the network is held
The buffering test awaited switchUrl before checking starvation and releasing
the withheld response. Switching can await canplay and resumed playback, so
this could stop the test from releasing the bytes needed to complete the switch.
Earlier installed WebKit traces stopped at this await. The initial current-source
rerun instead reached the existing native-starvation failure; these observations
are preserved separately.
beginAudioSwitch now starts the real switch without returning its Promise to
Playwright. It records pending/fulfilled/rejected status and timestamps. The test
can observe the actual HTTP gate while switching, then requires fulfillment after
release. Rejections cannot produce a passing result. Original trusted waiting,
nonzero time, stalled-audio behavior, recovery, synchronization and media-error
assertions remain. Phase, switch and media observations are attached before cleanup.
A new regression withholds every encoded frame while sending complete ftyp and
moov boxes from the existing MP4: 1,605 bytes derived from box sizes. It requires
a held request and pending switch, then releases the network and checks fulfillment
and resumed video/audio clocks. This tests orchestration, not ongoing playback
starvation. An initial one-byte fixture caused all four Firefox combinations to
reject with a native media error; that failed run is retained. The final fixture
sends complete format/metadata boxes instead of accepting those errors.
With the final fixture, reinstating the exact old await expression reproduced a
20-second Chromium timeout in begin-switch, with 1,605 bytes sent and the request
held. The corrected source was restored byte for byte. All 12 corrected cases
pass: published/current core crossed with published/current Audio Track in
Chromium 153.0.8010.12, Firefox 155.0 and Windows WebKit 26.6, without retry/skip.
The separate original starvation matrix remains 16 passed and 8 failed. All failures are Windows WebKit at the trusted native-starvation assertion; two video cases have pending switches and two have fulfilled switches. Completion and starvation therefore remain separate observations. AUDIO-BUFFER-01 is not waived. The final metadata correction changes only the new case; original starvation inputs/assertions and the shared helper retain the tested bytes. These separate runs must not be described as a fully green 36-case suite.
Canonical Node 24.21.0/Yarn 1.22.22 were used. Three real HTTP gate unit tests and read-only spec lint pass. The validation record retains run summaries, input provenance, report hashes and phase/media/request evidence. Candidate browser inputs are source builds, not installed npm tarballs. No production API/code, media fixture, gate server, timeout, dependency or distribution changed. This closes test ordering only; PKG-AUDIO-05/06 and native buffering/device acceptance remain outstanding. No formal review, push, deployment or publication was performed.