test-driven-development

Test-driven development (TDD) is a process where you write a failing test before any production code. The Red-Green-Refactor cycle guides you through writing a failing test, making it pass, and refining the code to prevent regressions.

To write tests first during feature development, you mandate the creation of a failing test before writing implementation code. This ensures code quality by verifying that new functionality is immediately covered by tests.

Yes, TDD applies to bug fixing and refactoring tasks. You enforce the process by writing a failing test that reproduces the bug or verifies the refactored behavior before modifying any production code.

Test-driven development requires a failing test first to validate that your test checks the right behavior and to prevent regressions. This principle ensures all new code is justified by a test.

The best way to prevent code regressions is to follow the test-driven development cycle. By writing failing tests before implementation, you ensure all new code and bug fixes are validated against expected behavior.