testing-test-writing

Features and purpose

Follow TDD cycle (RED-GREEN-REFACTOR) writing failing tests first, covering edge cases and error states, using explicit fixtures, and maintaining fast test suites with coverage gates. Use this skill when writing unit tests, integration tests, contract tests, or any test code in test files. Applies to test directories, spec files, test runners (Jest, Vitest, pytest), mocking strategies, regression prevention, and ensuring statement/branch coverage thresholds that block merges when dropped.

Quick start

Follow the repository instructions for this skill and your agent. Review the files and dependencies before adding it to your workflow.