Test was passing locally but failing in CI on the merge of v0.2.4.1.
Root cause: MagicMock returns a truthy default for any unset attribute,
so mock_printer.plate_detection_enabled was truthy and the production
code's plate detection block ran for real. Locally with ffmpeg present
the capture path completed cleanly (try/except swallowed errors) and
flow continued to start_session. In CI without ffmpeg, the failure path
in capture_camera_frame_bytes prevented execution from reaching the
expected-archive branch's start_session call, so the assert_called_once
on the patched start_session tripped.
Plate detection isn't the subject under test (start_session in the
expected-archive branch is). Setting plate_detection_enabled = False
explicitly on the mock skips that block entirely and makes the test
robust to environmental differences. Test also drops from ~9s to ~2s
since real frame-capture attempts no longer run.
maziggy
ae3cb479c7