testing-components

Test React 19 components with useActionState by rendering the component, simulating user interactions with React Testing Library, mocking Server Actions, and asserting form states using screen queries. This Skill provides patterns for unit tests, interaction tests, and form validation in Vitest.

Write form submission tests by rendering your form component, simulating user input and clicks with user-event, mocking Server Actions, and verifying success or error states. React Testing Library combined with Vitest handles asynchronous updates and state assertions for useActionState forms.

Test Context-consuming components by wrapping them in a Context provider during render, then simulating user interactions and asserting that data flows correctly. This Skill covers rendering with Context setup and verifying component behavior against Context values.

Yes. React Testing Library is built for testing user interactions by simulating events like clicks and form input, then asserting DOM changes. This Skill applies these patterns to React 19 components, including async updates with useActionState.

Yes. Mocking Server Actions isolates your component tests and lets you verify form behavior, validation, and state handling without calling real endpoints. This Skill includes patterns for mocking Server Actions in Vitest to test success and error paths.

React 19 testing patterns include rendering components, simulating user events, mocking Server Actions, managing useActionState state, and handling asynchronous updates. This Skill provides actionable examples using React Testing Library and Vitest for unit, interaction, and form tests.