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Comprehensive Test Plan for WebAudio Library

1. Analysis of Current Test Coverage

Existing Test Structure

  • 50 tests currently implemented
  • Using Vitest as the testing framework
  • Utilizing standardized-audio-context-mock for WebAudio API mocking

Identified Gaps

  • Limited coverage of edge cases and error handling
  • Lack of performance testing
  • Insufficient integration tests between components
  • Minimal testing of concurrent audio operations

2. Improvements to Existing Tests

  • Enhance mock object usage for more realistic audio context simulation
  • Implement more granular assertions to catch subtle audio processing errors
  • Increase test coverage for different audio formats and configurations
  • Add more comprehensive cleanup procedures after each test

3. New Test Cases

Cacophony Class

  • Test initialization with different AudioContext configurations
  • Verify proper handling of unsupported AudioWorklet scenarios
  • Test global volume control and muting functionality
  • Validate listener orientation and position settings

Sound Class

  • Test loading of various audio formats (MP3, WAV, OGG)
  • Verify correct behavior of looping with different loop counts
  • Test seeking functionality, including edge cases (beginning, end, beyond duration)
  • Validate cloning of Sound instances with different override configurations

Playback Class

  • Test pause and resume functionality at different playback points
  • Verify correct application of playback rate changes
  • Test behavior when rapidly switching between play, pause, and stop
  • Validate proper cleanup of resources after playback ends

Synth Class

  • Test creation of different waveform types
  • Verify frequency and detune adjustments
  • Test addition and removal of audio filters
  • Validate 3D audio positioning for synthesized sounds

Group Class

  • Test adding and removing sounds from a group
  • Verify collective operations (play, stop, volume change) on grouped sounds
  • Test ordered and random playback within a group
  • Validate proper resource management for large groups of sounds

Filters

  • Test application of various filter types (lowpass, highpass, bandpass)
  • Verify filter parameter adjustments (frequency, Q, gain)
  • Test chaining multiple filters
  • Validate filter behavior at extreme settings

4. Performance Testing

  • Measure CPU usage during simultaneous playback of multiple sounds
  • Test memory usage over time, especially with long audio streams
  • Benchmark loading times for various audio file sizes and formats
  • Evaluate performance impact of complex filter chains

5. Integration Testing

  • Test interaction between Cacophony and Sound classes
  • Verify proper integration of Synth with Group functionality
  • Test combined usage of streamed and buffered audio sources
  • Validate interaction between 3D audio positioning and global listener settings

6. Error Handling and Edge Cases

  • Test behavior with invalid audio files or URLs
  • Verify graceful handling of AudioContext suspension and resumption
  • Test recovery from audio playback interruptions (e.g., system events)