Skip to content

Mandate: Test-Driven Development (TDD)

Type: SELECTABLE MANDATE
ID: M002
Category: Testing / Quality

🎯 Goal

Ensure 100% functional coverage and design clarity by writing tests before implementation code.

📜 Requirement

All code changes must follow the Red-Green-Refactor cycle: 1. Red: Write a failing test for the new requirement. 2. Green: Write the minimal implementation to pass the test. 3. Refactor: Clean up the implementation while keeping the test green.

⚖️ Rationale

Ensures that the developer (or agent) is solving the right problem and that the solution is testable by design.

✅ Validation

  • Test coverage ≥ 90% (or project-defined threshold).
  • Git history shows test files created/modified before or alongside implementation files.
  • pytest --cov passes with target metrics.