test-driven-development

Test-driven development improves code quality and prevents regressions by mandating a failing test before any production code is written, ensuring every feature is validated and minimizing untested logic.

The red-green-refactor cycle in TDD is a three-step process: writing a failing test, implementing minimal code to pass the test, and then refactoring the code while ensuring tests remain green.

To start implementing a new feature using TDD, write a test that defines the desired functionality and fails initially, then write just enough production code to make that test pass before refactoring.

You should use the test-driven development methodology when starting a new feature or fixing a bug, as it guides you to write tests first, ensures minimal code to pass tests, and facilitates safe refactoring.

Yes, TDD requires writing minimal code to pass tests before refactoring, ensuring the refactoring phase only cleans up existing logic while maintaining green tests and preventing feature creep.