How can I use advanced mocking techniques in Jest?

How can I use advanced mocking techniques in Jest?

You can use advanced mocking techniques in Jest by utilizing functions like jest.mock(), jest.spyOn(), and custom mock implementations.

Can you explain how jest.mock() works?

Sure! jest.mock() allows you to mock entire modules. You can specify the module path and provide a mock implementation if needed.

What about jest.spyOn()? How is it different?

jest.spyOn() is used to spy on existing methods of an object. It allows you to track calls to the method and modify its implementation.

Are there any best practices for mocking in Jest?

Yes, some best practices include mocking only what you need, keeping mocks isolated, and resetting mocks between tests.