content: import React from 'react';
  import {shallow} from 'enzyme';
  import App from '../../effcalculator/frontend/assets/js/routes/App';
  import NavBarContainer from '../../effcalculator/frontend/assets/js/routes/NavbarContainer';
  
  describe('App', () => {
    let wrapper;
    beforeEach(() => {
      wrapper = shallow(<App />);
    });
    it('should render correctly', () => {
      expect(wrapper).toMatchSnapshot();
    });
    it('should render a <div />', () => {
      expect(wrapper.find('.App').length).toEqual(1);
    });
    it('should render the NavBar Component', () => {
      expect(wrapper.containsMatchingElement(<NavBarContainer />)).toEqual(true);
    });
  });