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 ANSI Color Build Sublime Text plugin using Poetry as the package manager and pytest as the testing framework.

Changes Made

Package Management

• Set up Poetry as the package manager (created pyproject.toml)
• Added testing dependencies as development dependencies:
  • pytest - Main testing framework
  • pytest-cov - Coverage reporting
  • pytest-mock - Mocking utilities

Testing Configuration

• Configured pytest in pyproject.toml with:
  • Test discovery patterns for test_*.py and *_test.py
  • Coverage settings with 80% threshold
  • HTML and XML coverage report generation
  • Custom test markers: unit, integration, slow
  • Strict mode with verbose output

Directory Structure

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

Development Commands

Both of these commands work to run tests:

• poetry run test
• poetry run tests

Shared Fixtures (conftest.py)

Created comprehensive fixtures for testing Sublime Text plugins:

• temp_dir - Temporary directory management
• temp_file - Temporary file creation
• mock_sublime - Mock sublime module with all constants and methods
• mock_sublime_plugin - Mock sublime_plugin classes (TextCommand, WindowCommand, EventListener)
• mock_view - Mock Sublime Text view objects
• mock_window - Mock Sublime Text window objects
• mock_settings - Mock settings with get/set/has/erase functionality
• sample_ansi_output - Sample ANSI colored strings for testing
• reset_modules - Auto-cleanup of imported modules between tests
• capture_stdout - Stdout capture for testing print statements

Updated .gitignore

Added comprehensive testing-related entries:

• Coverage files (.coverage, htmlcov/, coverage.xml)
• Claude configuration (.claude/*)
• Build artifacts and virtual environments
• IDE files

How to Use

1. Install dependencies:

   poetry install

2. Run all tests:

   poetry run test
   # or
   poetry run tests

3. Run specific test types:

   # Unit tests only
   poetry run pytest -m unit
   
   # Integration tests only
   poetry run pytest -m integration
   
   # Exclude slow tests
   poetry run pytest -m "not slow"

4. View coverage report:

   • Terminal: Coverage is shown after each test run
   • HTML: Open htmlcov/index.html in a browser
   • XML: Available at coverage.xml for CI integration

Notes

• The 80% coverage threshold is currently not met since no actual tests for the codebase exist yet
• This setup provides all the infrastructure needed to start writing comprehensive tests
• All validation tests pass, confirming the testing environment is properly configured
• Poetry lock file (poetry.lock) is tracked in git for reproducible builds