# Task 10: Testing & Validation

**Status:** ⚪ Not Started
**Created:** 2025-01-08
**Dependencies:** Task 09 (Documentation)

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## Objective

Perform comprehensive testing and validation to ensure the YouTube MCP server meets all quality standards before deployment. Verify test coverage, linting, type checking, and practical functionality.

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## Scope

- Run full test suite with coverage analysis
- Verify ≥73% code coverage requirement met
- Run linting and formatting checks
- Run type checking with mypy
- Manual integration testing in Zed
- Practical validation: Complete Vimjoyer GC video use case
- Document test results and any issues

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## Tasks

- [ ] Run full test suite: `uv run pytest --cov`
- [ ] Verify test coverage ≥73%
- [ ] Generate coverage report: `pytest --cov --cov-report=html`
- [ ] Review uncovered code and add tests if needed
- [ ] Run linting: `ruff check . --fix`
- [ ] Run formatting: `ruff format .`
- [ ] Run type checking: `mypy app/`
- [ ] Fix any linting/type errors
- [ ] Manual integration test in Zed:
  - Test all search tools
  - Test all metadata tools
  - Test all transcript tools
  - Test all comment tools
- [ ] **Practical validation test:**
  - "Search for vimjoyer nix garbage collection generations"
  - Get video details
  - Get transcript
  - Analyze transcript for GC tool info
  - Verify caching works throughout
- [ ] Document test results
- [ ] Document any known issues or limitations

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## Success Criteria

- [ ] All tests pass (100% pass rate)
- [ ] Code coverage ≥73%
- [ ] Zero linting errors
- [ ] Zero type checking errors
- [ ] All tools work correctly in Zed
- [ ] Practical use case successfully completed
- [ ] Server is stable and performant
- [ ] Ready for v0.0.1 release

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## Test Coverage Targets

**Minimum 73% overall coverage with:**
- `app/tools/youtube/client.py` - 100% (already achieved)
- `app/tools/youtube/models.py` - 100% (validated by tests)
- `app/tools/youtube/search.py` - ≥80%
- `app/tools/youtube/metadata.py` - ≥80%
- `app/tools/youtube/transcripts.py` - ≥80%
- `app/tools/youtube/comments.py` - ≥80%
- `app/server.py` - ≥60% (integration-focused)

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## Manual Test Checklist

**Search Tools:**
- [ ] search_videos returns results
- [ ] search_videos handles errors gracefully
- [ ] search_channels returns results
- [ ] search_channels handles errors gracefully
- [ ] Cache hits work (repeat queries instant)

**Metadata Tools:**
- [ ] get_video_details returns full metadata
- [ ] get_channel_info returns channel stats
- [ ] Error handling works (invalid IDs)

**Transcript Tools:**
- [ ] list_available_transcripts shows languages
- [ ] get_video_transcript_preview returns first N chars
- [ ] get_full_transcript returns complete text
- [ ] get_transcript_chunk supports pagination
- [ ] Handles videos without transcripts gracefully

**Comment Tools:**
- [ ] get_video_comments returns top comments
- [ ] Handles disabled comments gracefully

**End-to-End:**
- [ ] Search → Get Details → Get Transcript workflow
- [ ] Caching reduces API calls significantly
- [ ] Error messages are clear and helpful

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## Known Issues / Limitations

(Document any issues discovered during testing)

- [ ] Issue 1: [Description]
- [ ] Issue 2: [Description]

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## Notes

This is the final validation before release. Be thorough - test both happy paths and error cases.

After successful completion, the YouTube MCP server MVP is ready for v0.0.1 release and production use!

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## Next Steps After Task 10

- Bump version to 0.0.1 in pyproject.toml
- Create git tag: v0.0.1
- Consider publishing to PyPI (optional)
- Plan future enhancements (semantic search, playlist support, etc.)
