Implements #339. CI ran one check on static/js -- a syntax parse -- so any
behavioural regression shipped unnoticed until a user hit it. #335 is the
case in point: "Export All Stems" became permanently unclickable after a
single export, for every track, until the app restarted. It shipped in
alpha 15 and a user found it.
Setup is Playwright against the real backend. tests/e2e/serve.sh seeds a
throwaway jobs directory with one finished track and execs uvicorn
against it, with every data path redirected, so a run cannot read or
touch a developer's library. Only the separation pipeline is skipped;
the endpoints, the registry and the Range requests for stems are real.
Two details in the fixtures are load-bearing, both learned by getting
them wrong first:
- The sidebar renders from the library store, not /api/jobs. A job on
disk but absent from the store is invisible in the UI, and a test that
clicks nothing passes for the wrong reason.
- stubTauri installs a controllable window.__TAURI__ so the desktop code
path runs. This is the point of the exercise: #335 was invisible in a
browser, because there the synthetic <a>.click() closes the chip panel
before the busy state is applied and the bug hides. The stub also
leaves save_audio_file pending until the test settles it, so the busy
state machine is driven rather than raced.
Nine tests cover all four defects from #335 and #337: rows re-enabled
after an export in both host modes, a second export still working, the
busy state waiting on the save rather than a timer, failures surfacing
and recovering, and export errors not offering a "Try again" that sends
the user to the URL import field.
Verified by reintroducing each defect and watching the suite fail:
clearing only the visible rows on reset fails 3 tests (the panel is
closed by then, so a visibility-filtered clear clears nothing), the
fixed-timer reset fails 1, and the retry button fails 1.
MP4 format switching is only partly covered. The video format is hidden
unless the track has one, and a video fixture is its own piece of work,
so what is here pins that MP4 is not offered for audio-only tracks.
Beat grid and transport coverage remain open on #339.
Closes#339
Tha.Les