tdd

Test-driven development is a practice where you write a failing test before implementation. The red-green-refactor cycle means writing a failing test, making it pass with minimal code, then refactoring safely to ensure verifiable changes and reduce regression risk.

To start writing unit tests before code, write a failing test that captures the desired behavior for your new feature. Then, implement the minimum code required to make the test pass, and finally refactor the implementation for clarity and maintainable interfaces.

Yes, test-driven development applies across languages and frameworks. It encourages small, testable units and maintainable interfaces, using unit and integration tests to enforce fast feedback and safe refactoring regardless of the specific software engineering platform.

Writing a failing test before implementation code guides your software design and reduces hidden defects. Traditional development without validated expectations leads to brittle code, so requiring tests to drive implementation ensures minimal, verifiable changes and lowers regression risk.

Test-driven development may not suit exploratory prototyping where requirements are undefined. It relies on fast feedback and structured unit and integration tests, so if a project lacks clear behavioral expectations or a testing framework, the strict red-green-refactor cycle becomes difficult to enforce.