test-driven-development

Test-driven development prevents regressions by enforcing a failing test before implementation and verifying all tests pass after refactoring, ensuring new code doesn't break existing functionality.

The RED-GREEN-REFACTOR cycle in TDD involves writing a failing test, writing minimal code to pass that test, and then refactoring while keeping tests green to ensure quality.

To write a failing test for a new feature using TDD, define the expected behavior in a test that fails, then write the simplest code to make it pass, and finally refactor while keeping tests green.

Yes, TDD is applicable to all software development tasks including new features, bug fixes, and refactoring, ensuring code meets specific tested requirements before implementation to reduce bugs.

The best way to ensure code quality during development is using TDD to enforce a rigorous workflow, writing tests first to define requirements, then implementing minimal code to pass, and refactoring safely.

You need test-driven development when you want to enforce a rigorous workflow ensuring code meets tested requirements before implementation, thereby reducing bugs and improving code quality.