How do I mock Angular services in Jest?

How do I mock Angular services in Jest?

You can use Jest's mocking functions to create mock implementations of your Angular services. Would you like a code example?

Yes, please provide a code example.

Sure! Here's a simple example:

import { MyService } from './my-service';

jest.mock('./my-service');

const mockService = new MyService();
mockService.getData = jest.fn().mockReturnValue(of(['data1', 'data2']));

// Now you can use mockService in your tests.

This mocks the getData method to return an observable with mock data.

What if I want to test a component that uses this service?

You can provide the mocked service in the TestBed configuration like this:

TestBed.configureTestingModule({
  providers: [{ provide: MyService, useValue: mockService }]
});

This way, your component will use the mocked version of the service.