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JavaScript Testing Patterns provides comprehensive guidance and production-ready templates for establishing high-quality test suites in JavaScript and TypeScript environments. It streamlines the implementation of unit, integration, and end-to-end testing by offering standardized patterns for Jest and Vitest. Whether you are setting up new test infrastructure, mocking complex external dependencies, or adopting Test-Driven Development (TDD), this skill ensures your code remains reliable, maintainable, and well-covered through proven architectural patterns like dependency injection and module spying.
