feat: add comprehensive Python testing infrastructure

[llbbl]

Add Comprehensive Python Testing Infrastructure

Summary

This PR sets up a complete testing infrastructure for the QualiCLIP project, providing developers with a ready-to-use testing environment.

Changes Made

• Package Management: Migrated from shell script dependencies to Poetry-managed dependencies in pyproject.toml
• Testing Framework: Configured pytest with comprehensive settings including coverage reporting, custom markers, and strict options
• Project Structure: Created proper testing directory structure with tests/unit/ and tests/integration/ subdirectories
• Coverage Configuration: Set up coverage reporting with HTML/XML output, 80% threshold, and appropriate exclusions
• Shared Fixtures: Created comprehensive conftest.py with common testing fixtures for images, tensors, devices, and configurations
• Git Integration: Updated .gitignore with testing-related entries and build artifacts
• Validation: Added validation tests to verify the testing infrastructure works correctly

Testing Infrastructure Components

Dependencies

• pytest - Main testing framework
• pytest-cov - Coverage reporting
• pytest-mock - Mocking utilities

Configuration Features

• Test Discovery: Automatic discovery of test files and functions
• Coverage: 80% coverage threshold with HTML and XML reports
• Custom Markers: @pytest.mark.unit, @pytest.mark.integration, @pytest.mark.slow
• Strict Mode: Strict marker and config validation
• Filtering: Warning filters for cleaner output

Shared Fixtures

• temp_dir - Temporary directory for testing
• sample_image - RGB test images
• sample_tensor - Normalized tensors
• device - CUDA/CPU device detection
• mock_model_config - Mock model configurations
• mock_transforms - Image transformation pipelines

Instructions for Running Tests

# Install dependencies
poetry install

# Run all tests
poetry run pytest

# Run tests with coverage
poetry run pytest --cov=clip --cov-report=html

# Run only unit tests
poetry run pytest -m unit

# Run only integration tests  
poetry run pytest -m integration

# Skip slow tests
poetry run pytest -m "not slow"

# Run validation tests to verify setup
poetry run pytest tests/test_setup_validation.py -v

Development Notes

• All original dependencies from install_requirements.sh have been preserved in pyproject.toml
• Poetry lock file is included in version control for reproducible builds
• Coverage reports are generated in htmlcov/ directory
• Test markers allow for selective test execution
• Validation tests ensure the infrastructure works correctly

🤖 Generated with Claude Code