test-driven-development

Test-driven development is a coding practice where you write tests before implementing code, ensuring functionality and quality. The red-green-refactor cycle guides you to write a failing test, implement code to pass it, then refactor for maintainability.

To start writing tests before implementing code, begin by writing a failing test for the new feature you want to implement. Follow the structured TDD guidelines to ensure functionality, then use the verification checklist for thorough code review.

Common testing anti-patterns in TDD include writing tests that are tightly coupled to implementation details or testing too many things at once. This Skill identifies these common pitfalls and offers solutions alongside examples of good and bad tests.

Yes, you can use test-driven development practices to improve code reliability and maintainability. By focusing on writing tests before code and following a structured refactoring process, developers ensure thorough testing and higher software quality.

Test-driven development may not suit exploratory programming or throwaway prototypes where functionality is highly volatile. The overhead of writing tests first is best applied when you need rigorous verification and long-term code maintainability.