概要
This skill enhances Claude's ability to design and implement high-quality testing suites specifically for NestJS environments. It provides deep domain expertise in the AAA (Arrange-Act-Assert) pattern, the test pyramid philosophy, and proper use of the NestJS Testing Module. By guiding the setup of unit, integration, and E2E tests—including containerized database testing with Testcontainers—this skill ensures that developers avoid common anti-patterns like excessive mocking or testing private implementation details. It is an essential tool for teams aiming for high reliability and maintainable codebases through structured automated testing.