test-driven-development

Test-driven development using Jest requires writing a failing test first, then creating minimal production code to pass it, and finally refactoring. This Red-Green-Refactor cycle prevents regressions and ensures code quality before features are implemented.

The Red-Green-Refactor cycle in TDD is a workflow mandating a failing test first, writing minimal code to pass that test, and then refactoring the implementation. This rigorous process improves code quality and prevents bugs during development.

You can use this TDD workflow for both bugfixes and new features. The methodology enforces writing a failing test that reproduces the bug or defines the feature before writing any production code to fix or implement it.

No separate configuration is needed to enforce the test-first process. The methodology itself mandates the Red-Green-Refactor cycle within the backend testing environment, ensuring a failing test exists before any implementation code is written.

The best way to prevent regressions during refactoring is using test-driven development. By mandating tests before implementation and maintaining the Red-Green-Refactor cycle, you ensure existing functionality remains intact while improving code structure.

Writing a failing test before production code enforces the TDD methodology, ensuring the test actually validates the new feature. This prevents false positives, guides minimal implementation, and guarantees high code quality through the Red-Green-Refactor cycle.