feat: Add comprehensive Python testing infrastructure with Poetry

[llbbl]

Add Python Testing Infrastructure

Summary

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

Changes Made

Package Management

• Set up Poetry as the project's package manager
• Created pyproject.toml with all project dependencies and development dependencies
• Configured Poetry to manage both lib and scripts packages

Testing Framework

• Added pytest with coverage and mocking utilities as development dependencies
• Configured pytest with:
  • Coverage reporting (HTML, XML, and terminal output)
  • Custom markers for test categorization (unit, integration, slow)
  • Strict test discovery patterns
  • Comprehensive test output formatting

Project Structure

• Created organized test directory structure:

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

Testing Fixtures

Added comprehensive shared fixtures in conftest.py:

• temp_dir - Temporary directory for test files
• mock_boto3_client - Mock AWS client for testing
• mock_boto3_session - Mock AWS session
• mock_neo4j_driver - Mock Neo4j driver for graph database testing
• sample_aws_config - Sample AWS configuration
• sample_aws_resource - Sample AWS resource data
• reset_environment - Auto-reset environment variables
• mock_console - Mock console for output testing
• mock_git_repo - Mock git repository

Development Commands

Configured Poetry scripts for running tests:

• poetry run test - Run all tests with coverage
• poetry run tests - Alternative command (both work identically)

Both commands support all standard pytest options.

Additional Configuration

• Updated .gitignore with:
  • Testing artifacts (.pytest_cache/, .coverage, htmlcov/, etc.)
  • Virtual environment directories
  • IDE files
  • Build artifacts
  • Claude settings directory (.claude/*)

How to Use

1. Install Poetry (if not already installed):

   curl -sSL https://install.python-poetry.org | python3 -

2. Install dependencies:

   poetry install

3. Run tests:

   # Run all tests
   poetry run test
   
   # Run with specific options
   poetry run test tests/unit/ -v
   
   # Run specific test markers
   poetry run test -m unit
   poetry run test -m "not slow"

4. View coverage report:

   • HTML report: Open htmlcov/index.html in a browser
   • XML report: Available at coverage.xml
   • Terminal report: Shown automatically after test run

Notes

• The infrastructure is set up with an 80% coverage threshold configured in pyproject.toml
• All test dependencies are properly isolated as development dependencies
• The validation tests verify that the infrastructure is working correctly
• No actual unit tests for the codebase were written - this PR only sets up the infrastructure

Next Steps

With this testing infrastructure in place, developers can now:

1. Write unit tests for individual modules
2. Create integration tests for AWS service interactions
3. Add performance tests using the @pytest.mark.slow marker
4. Leverage the provided fixtures for consistent test setup