Mandatory TDD/BDD Testing Strategy

To enforce TDD and BDD, you mandate writing failing tests before implementation, use deterministic selectors for frontend tests, and require a minimum of 80% code coverage for both backend and frontend codebases.

A mandatory TDD testing strategy requires a minimum of 80% test coverage for all codebases. You must generate evidence of test execution and coverage reports to verify this threshold is met before merging.

To execute backend Python tests and generate a coverage report, run the command `python3 -m pytest tests/ -v --cov=app --cov-report=term-missing` to evaluate your test suite against the application code.

Deterministic selectors, such as `data-testid`, `role`, and `label`, provide stable element targeting for frontend UI testing. They prevent tests from breaking due to styling changes and ensure reliable behavior-driven development validation.

Yes, this TDD and BDD testing strategy applies to both Python backend and TypeScript frontend codebases. It enforces test-first development and mandates an 80% coverage threshold across the entire software project.

You should use behavior-driven development alongside test-driven development when you need to validate user-facing frontend interactions using deterministic selectors, ensuring both backend logic and UI behavior meet strict coverage thresholds.