test-driven-development

Test-driven development captures requirements as tests before coding. The red-green-refactor workflow enforces writing a failing test first, implementing minimal production code to pass it, and then refactoring while keeping tests green.

Apply test-driven development by first writing a failing test that reproduces the bug or verifies the desired behavior. Implement the simplest code change to turn the test green, then refactor iteratively while ensuring automated tests remain passing.

Writing failing tests first prevents silent regressions by ensuring requirements are captured as tests before production code exists. This approach guides design decisions and verifies behavior through minimal, test-first implementations.

Yes, the test-driven development workflow applies to new features, bug fixes, and refactors. It ensures tests exist before production code across all scenarios, maintaining quality assurance and guarding against regressions throughout the process.

Begin a test-first implementation by writing a failing test that defines the feature's expected behavior. Next, implement the minimal production code required to pass that test, and finally refactor the codebase while keeping the automated tests green.