typescript-e2e-testing

The typescript-e2e-testing skill provides end-to-end and integration testing for TypeScript and NestJS projects using Jest and supertest against real infrastructure via Docker (Kafka, PostgreSQL, MongoDB, and Redis), following the Given-When-Then pattern. It activates for work on .e2e-spec.ts files or anything under test/e2e, and for setting up, writing, reviewing, running, debugging, or optimizing E2E and integration tests.

It is organized around six workflows (setup, writing, review, running, debugging, and optimize) selected by detecting the user's intent, each of which loads specific knowledge files. A structured references knowledge base covers shared fundamentals (core concepts, mandatory rules, best practices, GWT templates, NestJS setup, debugging) plus technology-specific folders for Kafka, PostgreSQL, MongoDB, Redis, and APIs with their rules, test helpers, Docker setups, and examples. A core principle is context efficiency: redirecting verbose E2E output to temp files with a unique session ID rather than the console, and fixing one failing test at a time.

It is most useful for engineers building or maintaining E2E and integration tests for NestJS services that depend on real infrastructure, including handling flaky tests, test isolation, and performance optimization.