tdd-workflow

name	tdd-workflow
description	Test-driven development cycle. Triggers on: 'TDD', 'test first', 'write tests'.

TDD Workflow

Implement features using red-green-refactor cycle.

Steps

1. Write failing test — Write a test that captures the expected behavior. Run it and confirm it fails (red).
2. Implement — Write the minimal code to make the test pass. Do not over-engineer.
3. Verify green — Run the full test suite. All tests must pass, including the new one.
4. Refactor — Clean up the implementation while keeping tests green. Extract, rename, simplify.

Rules

• Never write implementation before the test exists and fails.
• Each cycle should be small — one behavior per test.
• Run the full test suite after each change, not just the new test.
• If a refactor breaks a test, fix the code not the test (unless the test was wrong).

Expected Outputs

• Failing test (red) with clear assertion message
• Passing test suite (green) after implementation
• Clean code after refactor, all tests still green