Test-Driven Development

The TDD Cycle

1. Red: Write a failing test
2. Green: Write minimal code to pass
3. Refactor: Improve code while keeping tests green

Workflows

• Write Test: Write a test that describes desired behavior
• Run Test: Verify it fails (Red)
• Implement: Write minimal code to pass
• Run Test: Verify it passes (Green)
• Refactor: Clean up while tests stay green
• Repeat: Next test case

TDD Example