pyproject.toml configuration in PyTest - Framework Patterns

Framework Mode - pyproject.toml configuration

Folder Structure

tests/
├── test_example.py
├── conftest.py
src/
├── app_module.py
pyproject.toml
README.md

Test Framework Layers

• Tests: Located in tests/ folder, contains test scripts like test_example.py.
• Fixtures & Hooks: In conftest.py, reusable setup and teardown code for tests.
• Application Code: In src/, the main code under test.
• Configuration: pyproject.toml holds pytest settings and dependencies.
• Utilities: Helper functions or modules can be added under tests/utils/ or src/utils/.

Configuration Patterns

The pyproject.toml file centralizes pytest configuration and dependencies.

[tool.pytest.ini_options]
minversion = "7.0"
addopts = "-ra -q"
testpaths = ["tests"]
markers = [
  "smoke: quick smoke tests",
  "slow: slow running tests"
]

[tool.poetry.dependencies]
python = ">=3.12"

[tool.poetry.dev-dependencies]
pytest = "^7.0"
pytest-cov = "^4.0"

This setup defines minimum pytest version, test folder, custom markers, and dependencies.

Use environment variables or separate config files for sensitive data like credentials.

Test Reporting and CI/CD Integration

• Use pytest plugins like pytest-cov for coverage reports.
• Configure reports in pyproject.toml or via CLI options.
• Integrate with CI/CD pipelines (GitHub Actions, GitLab CI) to run tests automatically on code changes.
• Publish test results and coverage badges for team visibility.

Best Practices

• Centralize configuration: Keep pytest settings in pyproject.toml for easy maintenance.
• Use markers: Define test categories to run subsets easily.
• Version control dependencies: Manage pytest and plugins versions explicitly.
• Separate sensitive data: Avoid hardcoding credentials in config files.
• Keep folder structure clean: Separate tests, source code, and utilities clearly.

Self Check

Where in this framework structure would you add a new fixture to initialize a database connection for tests?

Key Result

Use pyproject.toml to centralize pytest configuration, dependencies, and test settings for a clean, maintainable test framework.