Claude
971f0ba9d6
test: Add comprehensive test coverage for PlaylistSource and ResamplingNode
This commit adds extensive unit and integration tests for the audio pipeline
components that were previously untested.
## ResamplingNode Tests (pmoaudio/src/nodes/resampling_node.rs)
- Added 7 test functions covering:
- Helper function tests: extract_channels_i16/i24
- Reconstruction tests: reconstruct_chunk_i16/i24
- Logic tests: passthrough when sample rate matches
- Async tests: verify sync markers pass through unchanged
- Integration test: actual 44.1kHz → 48kHz resampling
## PlaylistSource Tests (pmoaudio-ext/src/sources/playlist_source.rs)
- Added 10 test functions covering:
- Stream validation: valid/invalid channel counts and bit depths
- PCM conversion: bytes_to_segment for I16/I24/I32 formats
- Mono/stereo handling: verify channel duplication
- Error handling: unsupported bit depth rejection
- Type safety: compilation verification
## Bug Fixes
- Fixed imports: Node and NodeLogic moved from nodes to pipeline module
- Fixed AudioCache import: use pmoaudiocache::Cache with alias
- Fixed API calls in ResamplingNode:
- BitDepth::from_audio_chunk() → match pattern
- .stereo() → .get_frames()
- .to_i32() → .as_i32() for I24
- .sample_rate() → .get_sample_rate()
## Documentation
- Added INSTALL_LIBSOXR.md with detailed installation instructions
- Documents local libsoxr installation without sudo privileges
- Provides troubleshooting guide for build and test environments
All tests pass successfully (17 tests total: 7 ResamplingNode + 10 PlaylistSource).
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