illustration for Mocking WebSocket APIs with Mock Service Worker
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Mocking WebSocket APIs with Mock Service Worker

  20. 20
    Test WebSockets in Vitest with MSW
    5m 42s

Test WebSockets in Vitest with MSW

Artem Zakharchenko
InstructorArtem Zakharchenko
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Published 6 months ago
Updated 6 months ago

Let's write an integration test for our <Chat/> component in Vitest and React Testing Library.

The WebSocket interception in MSW requires a global WebSocket class. You are covered if you're using Node.js v22 or higher since that global class exists there. But for older versions, we will create a custom Vitest environment to polyfill it using undici.

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