added some comments

Fin Reinhard

22.27.2019 910bf7b1c1e58c1b8dbe2ae7aeb362af5788a932

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import React from 'react';
import ReactDOM from 'react-dom';
import WebApp from './WebApp';
 
it('renders without crashing', () => {
    const div = document.createElement('div');
    ReactDOM.render(<WebApp/>, div);
    ReactDOM.unmountComponentAtNode(div);
});