Mock Service Worker

Testing Infrastructure


Mock Service Worker is a mocking app for HTTP request that:

  • intercepts requests at the network layer
  • and returns data as simple objects via mock handlers defined in a file.

You can write everything as if it was communicating with a backend service.


  • It does not require to write application or test code
  • You can have API calls return bad data for unhappy path testing, particular data for layout testing, etc.

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