Playing a track with an iTunes start time (e.g. "Pretty Girls is a
Motherfucker", 0:40) began at 0:00 whenever another track was already
loaded. QMediaPlayer.setSource() synchronously emits two status changes
before returning: a LoadedMedia still reporting the *outgoing* source,
then LoadingMedia for the new one. The stale first event consumed the
one-shot _pending_start_ms armed in Round 22 and seeked the dying
pipeline, so the new track's real LoadedMedia ~5 ms later found nothing
armed. Only the first track after launch worked.
The armed seek now carries the URL it belongs to and is consumed only
when source() matches. tests/test_round32.py models the real Qt event
sequence, which Round 22's plain MagicMock never emitted; the
test_round8/test_round22 stubs now report the new source by the time its
LoadedMedia arrives, as Qt does.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
travandClaude Opus 5
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