feat: Set up comprehensive Python testing infrastructure with Poetry

[llbbl]

Set up Python Testing Infrastructure with Poetry

Summary

This PR establishes a complete testing infrastructure for the PERM project, migrating from requirements.txt to Poetry for dependency management and adding comprehensive testing capabilities.

Changes Made

Package Management

• Added Poetry configuration via pyproject.toml with project metadata and dependencies
• Migrated existing dependencies from requirements.txt to Poetry format
• Set up development dependencies including pytest, pytest-cov, and pytest-mock
• Created Poetry script commands for easy test execution (poetry run test and poetry run tests)

Testing Configuration

• Configured pytest with comprehensive settings in pyproject.toml:

  • Test discovery patterns for various naming conventions
  • Coverage reporting with 80% threshold requirement
  • HTML and XML coverage report generation
  • Custom test markers (unit, integration, slow)
  • Strict configuration and verbose output

• Set up coverage reporting with:

  • Source directory inclusion (src/)
  • Proper exclusions for test files and common patterns
  • Multiple output formats (terminal, HTML, XML)
  • Configurable coverage thresholds

Directory Structure

• Created organized testing directories:

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

Shared Testing Utilities

• Added comprehensive fixtures in conftest.py:
  • temp_dir: Temporary directory management
  • mock_config: Mock configuration data
  • sample_hair_data: Generated hair data for testing
  • mock_model_weights: Mock neural network weights
  • sample_image_data: Sample image data
  • Environment setup and device configuration

Validation Tests

• Created validation test suite (test_setup_validation.py) to verify:
  • Basic pytest functionality
  • Coverage configuration
  • Custom test markers
  • Source code importability
  • Fixture functionality
  • Mocking utilities
  • Parametrized testing

Additional Improvements

• Updated .gitignore with testing artifacts:
  • Coverage reports and cache files
  • Claude Code settings
  • IDE and OS-specific files
• Maintained poetry.lock in version control for reproducible builds

Usage Instructions

Running Tests

# Install dependencies (first time setup)
poetry install

# Run all tests
poetry run test

# Run with coverage (default behavior)
poetry run pytest

# Run specific test categories
poetry run pytest -m unit          # Unit tests only  
poetry run pytest -m integration   # Integration tests only
poetry run pytest -m "not slow"    # Skip slow tests

# Run tests without coverage for faster execution
poetry run pytest --no-cov

# Generate HTML coverage report
poetry run pytest
open htmlcov/index.html

Test Organization

• Unit tests: Fast, isolated tests → tests/unit/
• Integration tests: Component interaction tests → tests/integration/
• Slow tests: Mark with @pytest.mark.slow for selective execution

Writing Tests

Use the provided fixtures in conftest.py for common test scenarios:

def test_example(temp_dir, mock_config, sample_hair_data):
    # temp_dir: temporary directory for file operations
    # mock_config: configuration dictionary
    # sample_hair_data: numpy arrays with hair data
    pass

Validation Results

All validation tests pass successfully:

• ✅ Basic pytest functionality
• ✅ Coverage configuration
• ✅ Custom markers (unit, integration, slow)
• ✅ Source code importability
• ✅ Shared fixtures and utilities
• ✅ Mocking capabilities

Dependencies Added

• pytest ^7.4.0 - Main testing framework
• pytest-cov ^4.1.0 - Coverage reporting
• pytest-mock ^3.11.1 - Mocking utilities
• numpy ^1.21.0 - For test data generation

Next Steps

The testing infrastructure is now ready for development. Developers can:

1. Start writing unit tests in tests/unit/
2. Add integration tests in tests/integration/
3. Use the provided fixtures and markers
4. Maintain the 80% coverage threshold
5. Run tests with poetry run test

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🤖 Generated with Claude Code