test-driven-development

The test-driven development process requires writing a failing test before any implementation code. It enforces the Red-Green-Refactor cycle to develop robust software, prevent regressions, and ensure high code quality.

To start test-driven development, write a failing test that defines the desired feature behavior. Next, write the minimal production code required to pass the test, and finally refactor the implementation while keeping the tests green.

Writing failing tests before production code prevents untested logic from entering your codebase. This strict test-first methodology prevents regressions, enforces code quality, and ensures every feature has verifiable test coverage from the start.

Test-driven development fits agile software engineering workflows by enforcing the Red-Green-Refactor cycle. It provides immediate feedback during iterative development, ensuring code quality and preventing regressions as new features are rapidly added.

The best way to refactor safely is using the test-driven development methodology. By maintaining comprehensive tests written during the Red-Green cycle, you can refactor production code with confidence that any regressions will immediately trigger a failing test.