test-driven-development

Test-driven development is a workflow requiring a failing test first, implementing minimal code to pass it, and then refactoring. This red-green-refactor cycle ensures changes are guided by concrete tests, reducing regressions and increasing code reliability.

To start writing tests first, initiate a test-driven development cycle by writing a failing test that defines the desired behavior. Then implement the smallest amount of code to pass the test, followed by a refactor pass to maintain code quality.

Yes, test-driven development is applicable to various languages and stacks. The workflow is compatible with standard test runners like pytest, providing a clear incremental approach for feature development, bug fixing, and refactoring across any project.

Yes, test-driven development applies to refactoring scenarios. By enforcing a test-first workflow, it guides incremental implementation and ensures maintainability, giving you confidence that your refactoring changes do not introduce regressions.

Writing a failing test before coding ensures your test actually validates the new behavior. This test-first workflow provides a disciplined approach, reducing regressions and increasing confidence that your implementation meets the concrete requirements.