better-test-driven-development

Test-driven development solves untested features by enforcing a test-first workflow. It mandates writing failing tests first, implementing minimal production code to pass, and verifying 80%+ coverage across unit, integration, and end-to-end tests.

Apply TDD during refactoring by writing failing tests for critical paths first, then modifying the minimal production code to pass. This ensures 80%+ test coverage and mitigates regression risk before shipping the refactored features.

You should skip test-driven development for throwaway prototypes, generated code, and configuration changes. These scenarios are defined as clear exceptions to the 80%+ coverage requirement, avoiding unnecessary testing overhead.

The best way to start is by writing a failing test for the new feature, then implementing the simplest production code to make it pass. This Red-Green-Refactor cycle ensures high-quality, well-tested code.

TDD requires 80%+ coverage across unit, integration, and end-to-end tests before shipping. This mandatory coverage across critical paths ensures high-quality code and minimizes regression risk for new features and bug fixes.