tdd

Test-driven development is a workflow where you write failing tests before implementation to capture expected behavior. It improves software quality by using tests to drive design, provide living documentation, and prevent regressions through fail-fast feedback loops.

To start writing unit tests first, write a failing test for the target behavior, then implement the minimal code required to make that test pass. This test-first design approach ensures incremental refactoring and clear behavioral verification.

Test-driven development works for integration testing and iterative projects by supporting incremental refactoring across test suites. It provides fail-fast feedback loops and living documentation that describe product behavior throughout the development workflow.

Red flags in a test-first workflow indicate deviations from expected test-first design practices. The workflow includes clear modification guidelines and checks to ensure tests drive design, maintain behavioral verification, and prevent regressions during incremental refactoring.

The best way to use behavioral testing for living documentation is to enforce writing tests before implementation. These test suites describe product behavior clearly, providing fail-fast feedback and ensuring expected behavior is captured throughout iterative development.