import TestRenderer from 'react-test-renderer';function Link(props) {
  return <a href={props.page}>{props.children}</a>;}const testRenderer = TestRenderer.create(
  <Link page="https://www.facebook.com/">Facebook</Link>);console.log(testRenderer.toJSON());// { type: 'a',//
   props: { href: 'https://www.facebook.com/' },//
   children: [ 'Facebook' ] }