test-driven-development

Test-driven development begins by writing a failing test that defines the desired behavior before creating any production code. You then implement the minimum code required to pass the test, preventing bugs and ensuring robust features from the start.

The Red-Green-Refactor cycle is a test-driven development workflow where you write a failing test (Red), implement code to make it pass (Green), and then improve the code without changing its behavior (Refactor) to maintain software quality.

Yes, test-driven development is applicable to bug fixes and refactoring existing code. You write a test that reproduces the bug or verifies current behavior, then proceed through the Red-Green-Refactor cycle to implement the fix safely.

Yes, test-driven development fits naturally within agile workflows by documenting behavior through executable tests. It enforces quality assurance best practices by preventing regressions as new features are continuously developed and integrated.

The best way to ensure code quality and prevent regressions is enforcing the test-driven development methodology. By mandating failing tests prior to writing production code, you document behavior through executable tests and catch bugs early.