tdd

To enforce tests-first development, you must write a failing unit test before any production code. This strict sequencing prevents regressions by ensuring every feature is defined by a failing test initially.

The Red-Green-Refactor cycle is a tests-first workflow where you write a failing test, implement minimal code to pass it, then refactor safely. It structures iterative development around one test per feature.

To refactor code safely while maintaining a green test suite, you must first ensure your unit tests pass. You can then restructure the production code, running the tests-first workflow to verify no regressions occur.

Writing a failing test before production code enforces quality by clarifying behavior upfront. This tests-first approach prevents unreliable workflows where code is written without clear validation criteria.

No, you should not implement multiple features in one TDD iteration. The tests-first workflow requires one test per feature to prevent mixing changes, ensuring minimal implementation until the specific failing test passes.

Yes, TDD prevents regressions during iterative development by enforcing a strict Red-Green-Refactor sequence. This tests-first discipline ensures production code is always validated by a previously failing test.