What are Jest mock functions and how do I use them?
An example of an AI chatbot conversation about Jest mock functions in testing.
What are Jest mock functions and how do I use them?
Jest mock functions are functions that simulate the behavior of real functions in your tests. They allow you to track calls, return values, and more.
Can you give me an example of how to create a mock function?
Sure! You can create a mock function using jest.fn(). For example: const myMock = jest.fn();.
How can I check if my mock function was called?
You can use expect(myMock).toHaveBeenCalled() to assert that the mock function was called during the test.
What if I want to mock a function to return a specific value?
You can use mockReturnValue(value) method. For example: myMock.mockReturnValue('Hello'); will make it return 'Hello'.
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