testing http calls

integrationTests.js

// to mock a whole imported dependency, do this
jest.mock('my-http-client');
import http from 'my-http-client';

// ...

it('should change the text on click', () => {
  http.get.mockImplementation({ body: 'the-return-of-my-get-request' });
  const sut = mount(
    <Provider store={store}>
      <MyComponent />
    </Provider>
  );
  
  sut.find('div').simulate('click');
  
  expect(sut.find('div').prop('children')).toEqual('the-return-of-my-get-request');
});