Learn how to mock a REST API server for testing with Jest and React Testing Library in this comprehensive tutorial video. Discover the process of setting up a mock REST API server using MSW and writing asynchronous unit and integration tests for a Next.js application. Follow along as the instructor guides you through adding dependencies, configuring the mock server, writing async unit tests, modifying server responses, completing CRUD operations, and updating integration tests. Gain valuable insights into best practices for testing React applications and improve your skills in creating robust, testable code.