feat: Add complete Python testing infrastructure with Poetry

[llbbl]

Add Python Testing Infrastructure

Summary

This PR sets up a complete Python testing infrastructure for the Selenium Python documentation project using Poetry as the package manager and pytest as the testing framework.

Changes Made

Package Management

• Poetry Configuration: Created pyproject.toml with Poetry configuration
  • Set package-mode = false since this is a documentation-only project
  • Migrated dependencies from requirements.txt and setup.py
  • Added testing dependencies as dev dependencies

Testing Framework

• pytest: Main testing framework with comprehensive configuration
• pytest-cov: Coverage reporting with HTML and XML output
• pytest-mock: Mocking utilities for testing

Testing Configuration

• pytest settings in pyproject.toml:

  • Strict markers and configuration
  • Custom markers: unit, integration, slow
  • Test discovery patterns configured
  • Coverage reporting with multiple formats

• Coverage settings:

  • Source directory configuration
  • Exclusion patterns for test files and virtual environments
  • Detailed reporting options

Directory Structure

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

Fixtures Added (in conftest.py)

• temp_dir: Temporary directory for test files
• mock_config: Mock configuration dictionary
• sample_rst_content: Sample reStructuredText for testing
• sphinx_build_dir: Mock Sphinx build directory structure
• source_dir: Mock source directory with basic Sphinx structure
• mock_sphinx_app: Mock Sphinx application object
• reset_environment: Environment variable cleanup
• sample_makefile_content: Sample Makefile content

Other Updates

• Updated .gitignore with:
  • Testing artifacts (.pytest_cache/, .coverage, htmlcov/, etc.)
  • Development files (virtual environments, IDE files)
  • Claude settings (.claude/*)

How to Use

Install Dependencies

poetry install

Run Tests

# Run all tests
poetry run pytest

# Run with verbose output
poetry run pytest -v

# Run specific markers
poetry run pytest -m unit
poetry run pytest -m integration

# Run without coverage
poetry run pytest --no-cov

View Coverage Reports

• HTML report: Open htmlcov/index.html in a browser
• XML report: Available at coverage.xml for CI/CD integration

Validation

The setup includes validation tests that verify:

• All testing dependencies are properly installed
• Project structure is correctly set up
• Configuration files are valid and complete
• Pytest markers work correctly
• Fixtures are available and functional
• Poetry commands work as expected

All validation tests pass successfully:

============================== 12 passed in 0.47s ==============================

Notes

• This is a documentation project, so coverage requirements are relaxed
• The Poetry scripts for test and tests commands use pytest:main entry point
• The infrastructure is ready for developers to start writing actual tests for any Python code or utilities in the project