text: import React from 'react';
  import { shallow } from 'enzyme';
  import App from '../client/App.jsx';
  jest.mock('../client/App.jsx');
  
  describe('App', () => {
    test('should render a <div />', () => {
      const wrapper = shallow(<App />);
      expect(wrapper).toMatchSnapshot();
    });
  
    test('should render 4 children elements', () => {
      const wrapper = shallow(<App />);
      const wrapperDiv = wrapper.find('div');
      expect(wrapperDiv.children().length).toEqual(0);
    });
  });
  