How do I mock other libraries in my tests?

How do I mock other libraries in my tests?

You can use libraries like Jest or Sinon to create mocks for other libraries. Would you like a specific example?

Yes, can you show me how to mock a database library using Jest?

Sure! You can use jest.mock() to mock the database library. Here's a simple example: jest.mock('db-library', () => ({ getData: jest.fn() }));.

What if I want to mock multiple functions from the same library?

You can mock multiple functions by returning an object with all the functions you want to mock, like this: jest.mock('db-library', () => ({ getData: jest.fn(), saveData: jest.fn() }));.

Are there any best practices for mocking?

Yes, keep your mocks simple and only mock what you need for your tests to avoid unnecessary complexity.