test-driven-development

Test-driven development improves code quality by guiding you through the Red-Green-Refactor cycle. You write a failing test first, implement minimal code to pass, and then refactor to ensure robust software without regressions.

The Red-Green-Refactor cycle is the core TDD workflow. You write a failing test, create minimal implementation code to make it pass, and then refactor the code while maintaining test coverage to prevent regressions.

Start writing failing tests by defining the expected behavior of your new feature before any implementation exists. This enforces a strict development workflow where minimal code is then written specifically to pass the test.

Writing tests first prevents regressions by mandating that all new code is verified against failing tests before implementation. This ensures existing functionality remains intact and new features work as intended throughout development.

This TDD workflow supports agile software development by enforcing iterative testing and refactoring. It guides developers through strict test-first cycles, ensuring code quality and preventing regressions during rapid feature delivery.

Strict test-driven development requires adherence to the Red-Green-Refactor cycle for every change, which can slow initial development. It mandates writing failing tests before any implementation, requiring discipline to maintain the workflow.