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ledgrab/plans/processed-audio-sources/phase-7-testing-polish.md
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alexei.dolgolyov 86a9d344e6 feat(processed-audio-sources): phase 1 - audio filter framework
Add the foundation for audio processing filters, mirroring the existing
picture filter/postprocessing template system:
- AudioFilter base class, AudioFilterRegistry, AudioFilterOptionDef
- AudioProcessingTemplate dataclass + SQLite-backed store
- audio_filter_template meta-filter with recursive resolution
- Full REST API: CRUD templates + filter registry discovery
- Dependency injection wired in dependencies.py and main.py
2026-03-31 17:35:39 +02:00

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# Phase 7: Testing & Polish
**Status:** ⬜ Not Started
**Parent plan:** [PLAN.md](./PLAN.md)
**Domain:** backend
## Objective
Verify the full feature works end-to-end, write tests, fix any remaining issues, and clean up dead code.
## Tasks
- [ ] Task 1: Write unit tests for each audio filter
- Test each filter transforms AudioAnalysis correctly
- Test stateful filters maintain and reset state
- Test edge cases: empty spectrum, zero rms, all-zero input
- Test filter option validation
- [ ] Task 2: Write unit tests for AudioFilterPipeline
- Test chain of filters produces expected output
- Test empty pipeline passes through unchanged
- Test reset() resets all stateful filters
- [ ] Task 3: Write integration tests for AudioProcessingTemplateStore
- CRUD operations
- Template composition (audio_filter_template) expansion
- Cycle detection in template composition
- Reference validation
- [ ] Task 4: Write integration tests for ProcessedAudioSource in AudioSourceStore
- CRUD operations
- Chain resolution (ProcessedAudioSource → ... → CaptureAudioSource)
- Cycle detection in source chains
- Reference validation (source + template must exist)
- Cascade delete checks
- [ ] Task 5: Write API tests for audio processing template endpoints
- Create, read, update, delete
- Validation errors (missing fields, invalid filter_ids)
- Reference check on delete
- [ ] Task 6: Write API tests for updated audio source endpoints
- Create/update ProcessedAudioSource and CaptureAudioSource
- Reject old types (mono, band_extract)
- Validation of source/template references
- [ ] Task 7: Verify backup/restore includes audio processing templates
- Create templates, backup, restore, verify they survive
- [ ] Task 8: Full build verification
- `ruff check src/ tests/ --fix` passes
- `npx tsc --noEmit` passes
- `npm run build` succeeds
- `py -3.13 -m pytest tests/ --no-cov -q` — all tests pass
- [ ] Task 9: Clean up dead code
- Remove any remaining imports of `MonoAudioSource`, `BandExtractAudioSource`
- Remove old `band_filter.py` if fully superseded by the band_extract filter (or keep if still used elsewhere)
- Remove unused schema classes
- Verify no orphaned i18n keys
- [ ] Task 10: Update system health/info endpoints if they enumerate audio source types
## Files to Modify/Create
- `tests/test_audio_filters.py`**create** — filter unit tests
- `tests/test_audio_filter_pipeline.py`**create** — pipeline tests
- `tests/test_audio_processing_template_store.py`**create** — store tests
- `tests/test_audio_source_store.py`**modify** — updated for new types
- `tests/test_audio_processing_templates_api.py`**create** — API tests
- `tests/test_audio_sources_api.py`**modify** — updated for new types
- Various files — **modify** — dead code cleanup
## Acceptance Criteria
- All new tests pass
- All existing tests pass (no regressions)
- Full build (Python + TypeScript) succeeds
- Ruff linting passes
- No dead code referencing removed types
- Backup/restore round-trips correctly with audio processing templates
## Notes
- This is the Big Bang verification phase — the first time build + tests are enforced
- Expect some breakage from Phases 1-6 that needs fixing here
- Focus on fixing real issues, not cosmetic cleanup
- `band_filter.py` may still be used by the band_extract filter — check before removing
## Review Checklist
- [ ] All tasks completed
- [ ] Code follows project conventions
- [ ] No unintended side effects
- [ ] Build passes
- [ ] Tests pass (new + existing)
## Handoff to Next Phase
<!-- N/A — final phase -->