How can I use advanced mocking techniques in Jest?

How can I use advanced mocking techniques in Jest?

You can use Jest's mocking functions like jest.mock() and jest.fn() to create advanced mocks. What specific scenario do you have in mind?

I want to mock a module that has multiple exports.

You can mock a module with multiple exports by using jest.mock('moduleName', () => ({ export1: jest.fn(), export2: jest.fn() })). Would you like an example?

Yes, please provide an example.

Sure! Here's an example:

jest.mock('./myModule', () => ({
  functionA: jest.fn(),
  functionB: jest.fn(),
}));

This will mock both functionA and functionB from myModule. Do you need help with anything else?

How do I reset mocks between tests?

You can reset mocks by using jest.resetAllMocks() in the beforeEach block of your tests. This ensures a clean state for each test.