text: import React from 'react';
  import ReactDOM from 'react-dom';
  import App from './App';
  
  it('renders without crashing', () => {
    const socket = {
      on: jest.fn()
    }
    const div = document.createElement('div');
    ReactDOM.render(<App socket={socket} />, div);
    ReactDOM.unmountComponentAtNode(div);
  });
  