test-driven-development

The red-green-refactor cycle in test-driven development involves writing a failing test to define expected behavior, implementing minimal code to pass it, and refactoring for clarity. This cycle smoothly evolves features and catches regressions early.

To implement a feature using test-driven development, write a failing test for a small unit of behavior first. Then, implement the minimal verifiable code required to pass the test before refactoring the implementation for maintainability.

Yes, test-driven development applies to bug fixes and refactoring existing code. By writing tests that guide design and prevent regressions first, developers can safely modify and verify both frontend and backend tasks.

The best way to ensure code quality with unit tests is maintaining clear, purposeful tests that reflect intended behavior. Writing minimal, verifiable code that passes real tests reduces defects and guides software design.

Writing failing tests before production code provides a disciplined approach to test-driven development. It defines expected behavior upfront, reduces defects, and ensures the production code is minimal and directly verifiable.