How do I create mocks in Jest?

How do I create mocks in Jest?

To create mocks in Jest, you can use the jest.mock() function. This allows you to mock modules or functions.

Can you show me an example of mocking a function?

Sure! Here's a simple example:

const myFunction = jest.fn();
myFunction.mockReturnValue('mocked value');
console.log(myFunction()); // Outputs: mocked value

What if I want to mock a module instead?

You can mock a module like this:

jest.mock('module-name');
const module = require('module-name');
module.functionName.mockReturnValue('mocked value');

How do I reset mocks between tests?

You can use jest.resetAllMocks() in the beforeEach block to reset mocks before each test.