test-driven-development

Test-driven development prevents regressions by enforcing a failing test before writing implementation code, ensuring every new feature or bug fix is verified by automated tests throughout the Red-Green-Refactor cycle.

The Red-Green-Refactor cycle is a unit testing workflow where you write a failing test, implement minimal code to pass the test, and then refactor the code to improve quality while keeping the test green.

To write a failing test before implementing a new feature, define the desired behavior through an automated unit test that fails initially, then write the minimal implementation code required to make that specific test pass.

Yes, this test-driven development workflow applies to bug fixes and refactoring by requiring you to write a failing test that reproduces the bug or verifies the refactored behavior before changing the implementation code.

Writing a failing test first guarantees that your code is written solely to satisfy a specific, unmet requirement, improving overall code quality and ensuring the testability of the software from the outset.

No specific testing frameworks are required to follow the TDD methodology; the workflow enforces the Red-Green-Refactor cycle and unit testing principles independently of any particular software development dependencies.