content: import React from 'react';
  import Enzyme, { shallow } from 'enzyme';
  import Adapter from 'enzyme-adapter-react-16';
  import Marker from '../src/Marker';
  
  Enzyme.configure({ adapter: new Adapter() });
  
  describe('Marker', () => {
    it('should render the marker', () => {
      const wrapper = shallow(<Marker progress={50} />, {
        context: {
          height: 100
        }
      });
  
      expect(wrapper.html()).toBe('<div class="timeline-marker" style="top:50px"><div class="text">50</div></div>');
    });
  });
  