React Testing Patterns

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This skill provides a standardized framework for writing resilient React tests using Jest and React Testing Library. It shifts the focus from testing implementation details to verifying user-facing behavior, ensuring that tests remain stable even during internal code refactors. By providing clear guidance on Mock Service Worker (MSW) for API interactions, table-driven test patterns, and specialized strategies for custom hooks and context, it enables developers to build high-quality, accessible applications with confident test coverage. It is particularly valuable during the implementation phase to guide test structure and strategy for both simple components and complex feature containers.

Características Principales

• API mocking strategies via Mock Service Worker (MSW) for realistic integration tests
• Standardized test structures for pure components, container components, and custom hooks
• Best practices for handling asynchronous operations and avoiding common testing pitfalls
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• User-centric testing patterns using React Testing Library and accessible queries
• Table-driven testing patterns (test.each) for efficient coverage of multiple scenarios

Casos de Uso

• Establishing a consistent testing strategy for a new or existing React and TypeScript project
• Refactoring legacy tests to focus on user behavior rather than brittle implementation details
• Implementing robust testing for complex asynchronous workflows and state-heavy custom hooks