tdd

Start TDD in a React Native with Vitest by running a Red-Green-Refactor cycle on a small feature. The workflow guides test target selection and the AAA pattern to validate code incrementally across Expo.

The AAA testing pattern structures tests into Arrange, Act, and Assert phases. It guides developers through the Red-Green-Refactor cycle to write tests early, enforce coverage, and reduce regression risk across JS/TS stacks.

Yes, TDD workflow guidance supports NestJS with Jest. It provides framework-specific examples and reference materials to accelerate test setup and validation for Node and TypeScript projects.

Exclude code from testing when it matches known non-test patterns. TDD guidance specifies Must Test targets and Exclude patterns to focus validation efforts on meaningful logic and reduce unnecessary test overhead.

Identify test targets for React Router v7 by applying Must Test rules to select critical logic. TDD guidance streamlines this selection process and provides framework-specific examples for Vitest and Jest setups.