text: import React from 'react';
  import {shallow} from 'enzyme';
  import {Header} from './index';
  
  describe('Header', () => {
  
    const header = shallow(<Header />);
  
    it('should render properly', function () {
      expect(header).toMatchSnapshot();
    });
  
    it('should contains Nav component', function () {
      expect(header.find('Nav').exists()).toBe(true);
    });
  });