Four pieces of test debt, root-caused and hardened:
1. exports.py test coverage (was: zero dedicated tests): new
tests/test_exports_api.py (26 tests) covering /export, /export/record,
/export/history, /export/reveal — happy paths, traversal/containment
guards (incl. symlink escape), destination validation, error mapping,
and the mp4 watermark-overlay branch with its plain-copy fallback.
Two real bugs found and fixed in the router:
- _safe_destination checked isabs() on realpath()'s output, which is
always absolute — dead check; a relative destination silently exported
to a cwd-dependent location instead of the documented 400.
- _safe_source let "." / ".." through the basename guard (caught only
later by realpath containment as a confusing 404); now 400 up front.
2. CI-Linux fp16 default-dtype leak (test_prefers_vocals_over_mix,
test_final_dub_track_and_seg_wav_are_watermarked): not reproducible on
macOS — instrumenting torch.set_default_dtype across both tests records
zero non-fp32 sets locally. Both tests now carry an opt-in
torch_dtype_isolation fixture (save/restore, so the leak can never
spread), and the conftest guard is demoted to pure insurance. A cheap
permanent recorder wraps torch.set_default_dtype /
set_default_tensor_type once torch appears and captures the setter's
stack only on a non-fp32 set; both fixtures print that stack when they
fire, so the next CI occurrence names the exact culprit call chain.
3. Test-order pollution (both reported combos): root cause was
collection-time sys.modules stubbing in backend/tests — seven modules
installed bare ModuleType stubs for core.config (and test_capture_ws.py
for services.model_manager/asr_backend/ffmpeg_utils, now all lazily
imported by the router anyway). pytest imports test modules during
collection, so the stubs leaked process-wide before any test ran:
- combo (a): monkeypatch.setattr("core.config.OUTPUTS_DIR", ...) in
test_longform_e2e died with AttributeError (core never gets a .config
attribute when the import is satisfied straight from sys.modules).
- combo (b): test_router_smoke's `from main import app` died with
ImportError: cannot import name 'find_ffmpeg' (unknown location).
Fix at source: new backend/tests/conftest.py sets a hermetic
OMNIVOICE_DATA_DIR (mirroring tests/conftest.py, #878) and the real
core.config is imported everywhere — zero sys.modules surgery. New
backend/tests/test_no_module_stubs.py guards the whole class (verified
fail-before/pass-after against the old stub). Stale rationale comments
in pyproject.toml and ci.yml updated to match.
4. batched_tts.py TODO(#312): investigated, comment corrected only —
#312 is closed (the live routes are engine-aware); this module has zero
call sites and stays an unintegrated experiment. See PR notes.
Full tests/ suite: 2796 passed. backend/tests standalone: 130 passed.
Both pollution combos re-run green in the reported orderings.
Co-authored-by: mergetest <test@local>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
debpalash