test-driven-development

The red-green-refactor cycle in test-driven development is an iterative process where you write a failing test, create minimal code to pass it, and then refactor the implementation while ensuring tests remain green.

To prevent code regressions, you should enforce a test-first approach by writing failing unit, integration, or E2E tests before implementing the new feature, ensuring all existing tests remain green during refactoring.

You need to write unit tests for isolated logic, integration tests for module interactions, and E2E tests for full system flows to establish comprehensive coverage standards and prevent regressions across your software architecture.

Common TDD anti-patterns to avoid include writing implementation code before a failing test exists, skipping the refactoring phase, and over-complicating initial code beyond what is required to make the test pass.

Yes, you can apply TDD principles to fix existing bugs by first writing a regression test that reproduces the specific failure, then writing the minimal code to make that test pass, and finally refactoring the solution.