Jest Testing Bundle

Database testing with Prisma and PostgreSQL, repository testing, transaction testing, migration testing, test data management. Activates when user mentions "database testing", "Prisma testing", "repository test", "PostgreSQL test", "transaction testing", "test database", or wants to test database operations.

Jest mocking patterns, jest.fn(), jest.mock(), spies, module mocking, dependency injection, mock implementations. Activates when user mentions "mock", "jest.fn", "jest.mock", "spy", "stub", "fake", "dependency injection testing", or wants to isolate code for testing.

Jest setup, configuration, test runner, assertions, lifecycle hooks, coverage. Activates when user mentions "Jest config", "setup Jest", "Jest configuration", "test coverage", "Jest hooks", "beforeEach", "afterEach", "describe blocks", or wants to configure Jest for JavaScript/TypeScript projects.

Integration testing for Express APIs, HTTP endpoint testing, supertest, API testing patterns, authentication testing, request validation. Activates when user mentions "integration test", "API testing", "Express testing", "supertest", "endpoint testing", "HTTP testing", or wants to test Express routes and middleware.

Unit testing patterns, TDD workflow, test factories, fixtures, pure function testing, class testing. Activates when user mentions "unit test", "TDD", "test-driven", "factory pattern", "test fixtures", "pure function testing", "class testing", or wants to write isolated unit tests.