test-driven-development

Test-driven development is a software development process where you write failing automated tests before writing the minimal production code required to pass them. This approach ensures new features are well-tested and prevents regressions from the start.

To implement new features using the Red-Green-Refactor cycle, first write a failing test for the desired behavior. Next, write minimal code to pass the test. Finally, refactor the code while ensuring the tests still pass.

Fix bugs using test-first implementation by writing an automated test that reproduces the bug and fails. Then, change your production code minimally until the test passes, ensuring the regression is prevented from recurring.

Yes, test-driven development works for agile software development by supporting iterative code quality improvements. It aligns with agile workflows by guiding developers through incremental behavior implementation and continuous refactoring without breaking existing functionality.

Use test-driven development for refactoring when you need to change software behavior safely while preventing regressions. It ensures your refactoring efforts are guided by passing automated tests, maintaining robust code quality throughout the process.