Summary
- Comprehensive testing strategies for JavaScript/TypeScript using Jest, Vitest, and Testing Library.
- Covers unit testing, integration testing, and component testing with patterns for pure functions, classes, async code, and React hooks Includes mocking strategies: module mocking, dependency injection, and spying on functions for isolated test execution Provides API and database integration test examples with real request/response handling and transaction cleanup Supports snapshot testing, test fixtures, coverage reporting, and best practices like the AAA pattern and TDD workflows