feat: Set up comprehensive Python testing infrastructure with Poetry

[llbbl]

Set Up Python Testing Infrastructure

Summary

This PR establishes a comprehensive testing infrastructure for the SDA (Speech-Driven Animations) project using Poetry as the package manager and pytest as the testing framework. The setup provides a solid foundation for developers to write and run tests efficiently.

Changes Made

Package Management Migration

• Migrated from setup.py to Poetry: Created pyproject.toml with all existing dependencies migrated from setup.py
• Poetry Configuration: Set up Poetry as the modern Python package manager with proper dependency management
• Lock File Policy: Configured .gitignore to track poetry.lock for reproducible builds

Testing Framework Setup

• Testing Dependencies: Added as development dependencies:
  • pytest (^7.4.0) - Core testing framework
  • pytest-cov (^4.1.0) - Coverage reporting
  • pytest-mock (^3.12.0) - Mocking utilities

Testing Configuration

• Pytest Configuration in pyproject.toml:

  • Strict markers and configuration enforcement
  • Coverage reporting with HTML and XML output formats
  • 80% coverage threshold requirement
  • Custom test markers: unit, integration, slow
  • Test discovery patterns for test_*.py and *_test.py

• Coverage Configuration:

  • Source tracking for the sda package
  • Exclusions for test files, migrations, and boilerplate code
  • Multiple report formats (terminal, HTML, XML)

Directory Structure

tests/
├── __init__.py
├── conftest.py               # Shared pytest fixtures
├── test_setup_validation.py  # Validation tests
├── unit/
│   └── __init__.py
└── integration/
    └── __init__.py

Test Fixtures (conftest.py)

Created comprehensive fixtures for common testing needs:

• temp_dir: Temporary directory management
• sample_audio_data: NumPy array audio data
• sample_image_data: NumPy array image data
• sample_tensor: PyTorch tensor samples
• mock_config: Configuration dictionaries
• sample_model_weights: Model weight files
• sample_audio_file: WAV file creation
• sample_image_file: PNG file creation
• reset_random_seeds: Automatic seed resetting
• gpu_available: GPU availability check
• mock_env_vars: Environment variable mocking
• capture_logs: Log message capturing

Development Experience

• Poetry Scripts: Run tests with either:
  • poetry run test
  • poetry run tests
• Standard pytest options: All pytest CLI options remain available
• Coverage Reports: Generated in htmlcov/ directory and coverage.xml

Other Changes

• Updated .gitignore: Added entries for:
  • Testing artifacts (.pytest_cache/, .coverage, htmlcov/, etc.)
  • Virtual environments
  • IDE files
  • Claude-specific directories (.claude/*)
  • Temporary files and OS-specific files

Running Tests

1. Install dependencies:

   poetry install

2. Run all tests:

   poetry run test
   # or
   poetry run tests

3. Run specific test markers:

   poetry run pytest -m unit        # Run only unit tests
   poetry run pytest -m integration # Run only integration tests
   poetry run pytest -m "not slow"  # Skip slow tests

4. View coverage report:

   # After running tests, open the HTML report
   open htmlcov/index.html  # macOS
   xdg-open htmlcov/index.html  # Linux

Notes

• The validation tests confirm that all testing infrastructure components work correctly
• Coverage is currently at 0% as no actual source code tests have been written yet
• The 80% coverage threshold is configured but developers should write tests to meet this requirement
• All dependencies from the original setup.py have been preserved in the Poetry configuration
• The poetry.lock file should be committed to ensure reproducible builds across environments

Next Steps

Developers can now:

1. Write unit tests in the tests/unit/ directory
2. Write integration tests in the tests/integration/ directory
3. Use the provided fixtures in conftest.py for common testing scenarios
4. Run tests locally before committing changes