test-driven-development

Test-driven development red-green-refactor is a methodology where you write a failing test, implement the minimal code to pass it, and then refactor. This ensures every line of production code is justified by a test.

You enforce TDD by applying the red-green-refactor cycle to new features, bug fixes, and refactoring tasks. This requires using terminal-based test runners to verify failure, pass, and regression states for every code change.

Yes, the TDD approach applies to any codebase and requires the use of terminal-based test runners. It guides implementation by verifying failure, pass, and regression states systematically for each code change.

Writing tests first prevents regressions by providing a safety net of a comprehensive test suite. The red-green-refactor cycle ensures that refactoring and feature additions are continuously verified against passing tests.

The best way to start is by writing a failing test for the specific behavior first. This clearly defines the requirement before you write the minimal production code necessary to pass the test.