What problem does it solve?
This Skill helps teams and engineers produce reliable, maintainable test suites that prevent regressions, document expected behavior, and make refactoring safe across unit, integration, and end-to-end levels.
Core Features & Use Cases
- Comprehensive Test Patterns: Guidance and examples for unit tests, integration tests, and E2E tests including fixtures, mocks, stubs, and table-driven or parameterized tests.
- Framework Coverage: Concrete practices and examples for Vitest/Jest, Pytest, Go test, JUnit, Playwright, Cypress, and Cucumber/Gherkin for BDD.
- TDD & BDD Workflows: Clear RED-GREEN-REFACTOR TDD flow, feature-driven BDD scenarios, and step definitions for automating acceptance criteria.
- Test Quality & Maintenance: Strategies for fast, isolated, and deterministic tests, flakiness diagnosis, coverage goals, and CI integration recommendations.
- Use Case: Write unit and integration tests for a user service, validate email handling and error paths, add API integration checks, and create an E2E registration flow for CI pipelines.
Quick Start
Generate a Vitest unit test suite for the UserService class that covers getUser and createUser with mocked database interactions and edge-case assertions.