tdd-workflow

The RED-GREEN-REFACTOR cycle in test-driven development is a process where you write a failing test, create minimal code to pass it, then refactor for quality. This iterative methodology ensures robust, maintainable software by enforcing test-first principles.

To apply TDD best practices for a new software feature, begin by writing a failing test for the desired behavior. Next, write the minimal code required to make that test pass, and finally refactor the implementation to improve code quality without changing functionality.

The Three Laws and the AAA pattern in TDD are core principles that structure test-driven development. The Three Laws enforce writing tests first and minimal code for passing, while the AAA pattern organizes tests into Arrange, Act, and Assert phases for clear software validation.

You should use test-driven development in your software development workflow when you require robust testing and iterative code improvement. It is ideal for projects needing high code quality and maintainability, ensuring features are built with validation from the very outset.

Test-driven development does not depend on specific testing frameworks. The methodology focuses on the universal RED-GREEN-REFACTOR cycle, meaning you can apply these test-first principles and refactoring rules using any testing tools compatible with your software stack.