feat: Add comprehensive Python testing infrastructure

[llbbl]

Add Python Testing Infrastructure

Summary

This PR sets up a complete testing infrastructure for the PyTorch Generalized Label Smoothing (GLS) project, providing developers with a ready-to-use testing environment.

Changes Made

Package Management

• Migrated to Poetry: Created pyproject.toml with Poetry configuration
• Updated Dependencies: Migrated all dependencies from requirements.txt to Poetry format with compatible versions
• Added Testing Dependencies: Included pytest, pytest-cov, and pytest-mock as development dependencies

Testing Configuration

• pytest Configuration: Added comprehensive pytest settings in pyproject.toml including:

  • Test discovery patterns for test_*.py and *_test.py files
  • Coverage reporting with 80% threshold
  • HTML and XML coverage report generation
  • Custom test markers (unit, integration, slow)
  • Strict options for better test reliability

• Coverage Configuration: Set up coverage reporting with:

  • Source directory inclusion (data, models, root)
  • Proper exclusion patterns for test files and build artifacts
  • Multiple output formats (terminal, HTML, XML)

Directory Structure

• Test Organization: Created organized testing structure:

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

Fixtures and Utilities

• Comprehensive Fixtures: Added common testing fixtures in conftest.py:
  • temp_dir: Temporary directory for file operations
  • sample_tensor, sample_labels: PyTorch tensors for ML testing
  • mock_dataset, mock_model: Mock PyTorch components
  • sample_config: Configuration dictionaries
  • device: Automatic CUDA/CPU device selection
  • Auto-seeding for reproducible tests

Development Tools

• Poetry Scripts: Added convenience commands:
  • poetry run test - Run all tests
  • poetry run tests - Alternative test command
• Git Configuration: Updated .gitignore with testing-related entries and Claude settings

Validation

• Infrastructure Tests: Created test_infrastructure.py to validate:
  • pytest functionality and fixture availability
  • PyTorch and NumPy integration
  • Test markers and temporary file handling
  • Mock utilities and device detection

Running Tests

After this PR is merged, developers can:

# Install dependencies
poetry install

# Run all tests
poetry run pytest

# Run with coverage
poetry run pytest --cov

# Run specific test types
poetry run pytest -m unit
poetry run pytest -m integration
poetry run pytest -m slow

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

Notes

• Dependency Updates: Updated dependencies to versions compatible with Python 3.11
• PyTorch Version: Upgraded from 1.4.0 to 2.0.x for better compatibility
• Coverage Threshold: Set to 80% - can be adjusted based on project requirements
• No Existing Tests Modified: Only infrastructure setup - ready for developers to add actual test cases

Future Work

This infrastructure supports:

• Unit testing for individual components
• Integration testing for end-to-end workflows
• Performance testing with @pytest.mark.slow
• Automated coverage reporting in CI/CD pipelines

🤖 Generated with Claude Code