test-driven-development

Test-driven development for feature building requires writing a failing test for the desired behavior first, running it to confirm failure, then implementing the minimal production code to pass before refactoring.

The red-green-refactor cycle mandates writing failing tests first, writing minimal code to make them pass, and refactoring only after the tests succeed to ensure reliable software.

Yes, a tests-first approach applies to bug fixes and refactoring by enforcing a failing test that captures the bug or desired behavior before changing any production code.

Start writing failing tests by defining the desired behavior in a test, running it to observe the failure, and then writing the simplest production code required to make that test pass.

Writing tests first improves software quality by enforcing a strict test-driven development workflow that requires real failing tests before implementation, ensuring reliability and maintainability across software projects.