What are some advanced techniques for mocking components in testing?

What are some advanced techniques for mocking components in testing?

Advanced mocking techniques include using libraries like Jest or Sinon, creating mock implementations, and using dependency injection.

Can you explain how to use Jest for mocking?

Sure! In Jest, you can use jest.mock() to mock modules and jest.fn() to create mock functions for your tests.

What about mocking API calls?

For API calls, you can use libraries like Axios and mock them with Jest by using jest.mock('axios') to simulate responses.

Are there any best practices for mocking?

Yes, some best practices include keeping mocks simple, avoiding over-mocking, and ensuring your tests remain readable and maintainable.