tdd

Test-driven development is a workflow where you write a failing test first, implement the minimum code to pass it, then refactor. The red-green-refactor cycle enforces incremental design by validating behavior after each change to prevent regressions.

Start writing tests before implementation by creating a focused, small failing test for the behavior you want. Then implement the minimum code to make the test pass, and run tests after each change to ensure verifiable progress.

Yes, you can apply test-driven development workflows across different programming languages. The guidance is language-agnostic and suitable for any tech stack or testing framework, emphasizing iterative validation and incremental design regardless of platform.

The best way to prevent regressions during refactoring is enforcing a red-green-refactor cycle. By running focused tests after each change, you gradually evolve code with confidence and ensure tests drive design while verifying behavior iteratively.

You should avoid test-first practice when the desired behavior is undefined or when rapid prototyping requires exploring design without verifiable constraints. Test-driven development needs clear behavioral expectations to create meaningful failing tests before implementation.