transcribe_fw.py is 302 lines against the cap and was untested. Tests land
first, in their own commit, so the split that follows is verified against
tests that predate the seam.
32 tests: argument parsing and its FW_* environment defaults, device and
compute resolution, the progress line, the transcription loop, model
loading, diarized output writing, and main()'s three exit paths.
faster_whisper is reached only through _try_import, so patching that seam
covers every path without the package installed. _format_progress_line is
tested directly rather than through the loop - it is pure, so the percentage
clamp, the ETA, and the suppression of an ETA longer than a day are each
assertable without a model.
The last coverage gap was _try_import itself, which every other test
patches; it is now exercised directly in both directions.
Split across three test files because a single pipeline module reached 321
lines - over the cap this work exists to clear. 275 tests pass in the
directory, up from 243 by exactly the 32 added.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011w2Pj4Ek3ZNMQVYcFHgXDY
