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 colXLM project using Poetry as the package manager and pytest as the testing framework.

Changes Made

Package Management

• ✅ Poetry Configuration: Added pyproject.toml with Poetry configuration for dependency management
• ✅ Testing Dependencies: Installed core testing packages:
  • pytest (v7.4.0+) - Main testing framework
  • pytest-cov (v4.1.0+) - Coverage reporting
  • pytest-mock (v3.11.1+) - Mocking utilities

Testing Configuration

• ✅ pytest Configuration: Comprehensive pytest settings in pyproject.toml:

  • Test discovery patterns for multiple file naming conventions
  • Coverage reporting (HTML, XML, terminal) with configurable thresholds
  • Custom markers: unit, integration, slow
  • Strict configuration and markers enforcement

• ✅ Coverage Configuration: Detailed coverage settings:

  • Source code inclusion/exclusion patterns
  • HTML report generation in htmlcov/
  • XML report for CI/CD integration
  • Configurable coverage thresholds

Directory Structure

• ✅ Testing Directories: Created proper test organization:

  tests/
  ├── __init__.py
  ├── conftest.py
  ├── test_setup_validation.py
  ├── unit/
  │   ├── __init__.py
  │   └── test_parameters.py
  └── integration/
      └── __init__.py
  

Shared Testing Utilities

• ✅ Fixtures: Comprehensive shared fixtures in tests/conftest.py:
  • temp_dir - Temporary directory management
  • mock_tokenizer, mock_model - ML model mocking
  • sample_embeddings, mock_faiss_index - Retrieval testing
  • sample_config - Configuration testing
  • Auto-seeding for reproducible tests

Infrastructure Validation

• ✅ Validation Tests: Created test_setup_validation.py with tests for:
  • Python version compatibility
  • Package imports and availability
  • Project structure validation
  • Testing directory structure verification
  • Fixture functionality testing
  • Marker system validation

Build Configuration

• ✅ Updated .gitignore: Added comprehensive exclusions for:
  • Testing artifacts (.pytest_cache/, .coverage, htmlcov/)
  • Build artifacts (build/, dist/, *.egg-info/)
  • Virtual environments and IDE files
  • Claude Code settings (.claude/)

Running Tests

Basic Commands

# Install dependencies
poetry install

# Run all tests
poetry run pytest

# Run with verbose output
poetry run pytest -v

# Run specific test types
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

Coverage Reports

# Generate HTML coverage report
poetry run pytest --cov-report=html

# View coverage in browser
open htmlcov/index.html

Test Selection

# Run specific test file
poetry run pytest tests/test_setup_validation.py

# Run specific test
poetry run pytest tests/test_setup_validation.py::test_python_version

Development Workflow

1. Write Tests: Add tests in appropriate subdirectories (tests/unit/, tests/integration/)
2. Use Fixtures: Leverage shared fixtures from conftest.py
3. Mark Tests: Use markers (@pytest.mark.unit, @pytest.mark.integration, @pytest.mark.slow)
4. Check Coverage: Ensure new code maintains coverage standards
5. Run Validation: Use poetry run pytest to verify all tests pass

Notes

• Coverage Threshold: Currently set to 1% for infrastructure setup; adjust to 80% when implementing actual tests
• Poetry Lock File: The poetry.lock file is intentionally tracked for reproducible builds
• Marker System: Custom markers are configured to organize test types effectively
• Fixture Scope: Auto-use fixtures ensure consistent test environments

Validation Results

All infrastructure validation tests pass:

• ✅ Python version compatibility (3.8+)
• ✅ Testing package imports
• ✅ Project structure validation
• ✅ Directory structure verification
• ✅ Fixture functionality
• ✅ Marker system operation
• ✅ Coverage configuration

🤖 Generated with Claude Code