tdd

Test-Driven Development requires writing a failing test before implementing minimal code to pass. This Red-Green-Refactor cycle validates requirements, maintains deterministic behavior, and catches regressions early across unit, integration, and end-to-end contexts.

The Red-Green-Refactor cycle is a testing workflow where you write a failing test, implement minimal code to pass it, then refactor. It maintains black-box verification and ensures observable behavior remains deterministic throughout development.

Yes, test-driven development applies to both bugfix cycles and feature development. It mandates writing failing tests to reproduce bugs or define features first, guaranteeing correct behavior and preventing regressions across unit, integration, and end-to-end testing.

Test-driven development supports integration and end-to-end testing. It emphasizes black-box verification and readability across all testing contexts, ensuring requirements are validated and code remains observable and verifiable at multiple levels.

Writing failing tests before code enforces a tests-first mindset that ensures requirements are validated and regressions are caught early. It maintains deterministic observable behavior and guarantees tests accompany every feature or bug fix.