test-driven-development

Test-driven development helps prevent defect risk by forcing tests to fail first and guiding design before implementing code. It requires a failing test before production code to guard against regressions and ensure correct behavior.

To start test-driven development, write a failing unit test that expresses the desired behavior, then implement the minimal production code required to pass the test. This mandatory failing-test approach prevents regressions and ensures maintainable code.

Use test-driven development whenever creating new functionality, fixing bugs, or refactoring software projects. It enforces a test-first workflow that verifies tests reflect real behavior, ensuring robust behavior and preventing regressions during code modifications.

Test-driven development requires no external dependencies to enforce its workflow. It operates by mandating failing tests first and guiding the red-green-refactor cycle, ensuring software quality assurance through unit tests without relying on specific external libraries.

The best way to prevent defect risk is test-driven development, which forces tests to fail first and guides design before implementing code. By requiring a failing test before production code, it guards against regressions and ensures robust behavior.