test-driven-development

Test-driven development is a process where you write a failing test first, implement minimal code to pass it, and then refactor. This red-green-refactor cycle drives feature development and prevents regressions by enforcing verification before implementation.

Begin by writing a failing test for the desired behavior, then run the tests to observe the failure. Implement the minimal code required to pass the test, and iteratively refactor while maintaining automated test execution.

Yes, test-driven development applies to feature development, bug fixes, and refactoring across projects using any language that supports automated tests. It catches failures early and documents intended behavior regardless of the specific tech stack.

Writing failing tests first ensures code changes are driven by verification, preventing defects and regressions. This approach enforces red-green-refactor cycles, improves code design, and documents intended behavior before the implementation logic even exists.

No specific testing frameworks or dependencies are required. Test-driven development works across any language with automated tests, requiring only an environment capable of executing tests to observe failures and validate minimal implementation passes.