test-driven-development

Test-driven development is a test-first workflow where you write a failing test, implement minimal code to pass it, then refactor for readability. This red-green-refactor cycle reduces bugs and regressions by validating behavior before production code.

To write unit tests first, create a failing test defining the new behavior, implement the minimal code required to make it pass, then refactor the code for maintainability. This test-first workflow ensures code quality during feature development.

Yes, you need a test framework to execute your unit tests and drive the test-driven development workflow. The approach requires a test framework to validate code behavior, run the red-green-refactor cycle, and ensure quality assurance across software projects.

Yes, test-driven development applies to bug fixes and refactoring across software projects. When fixing a bug, start with a failing test reproducing the issue, then drive implementation from that signal to ensure code quality and prevent regressions.

Writing a failing test before production code enforces disciplined development by validating expected behavior upfront. This test-first workflow reduces bugs and regressions by ensuring code behavior is validated before implementation.