Great work! We have covered a lot over this lesson. Let’s take a moment to review:

• We have learned that Jest is an easy-to-use framework for testing in a JavaScript environment because it combines a test-runner with assertion methods like the expect() API.
• We also learned some of the basic syntax involved with creating a simple unit test, such as the test() function.
• After tackling basic unit tests we adventured into the realm of testing asynchronous code with Jest by using the done parameter to wait for asynchronous callbacks and the async/await keywords to wait for Promises to resolve
• Lastly, we learned how to mock functions using jest.fn() and make use of mocked modules with jest.mock() by mocking the Axios module.

While we have learned a lot there is always more knowledge to be obtained and we encourage you to continue exploring Jest and its wonderful features!