text: import React from 'react';
  import { shallow, configure } from 'enzyme';
  import Adapter from 'enzyme-adapter-react-16';
  
  import App from '../../app/components/app';
  
  configure({ adapter: new Adapter() });
  
  describe('App Component', () => {
    let wrapper;
  
    beforeEach(() => {
      wrapper = shallow(<App />);
    });
  
    it('should exist', () => {
      expect(wrapper).toBeTruthy();
    });
  
    it('should have one heading', () => {
      expect(wrapper.find('#heading').type()).toEqual('h2');
    });
  });
  