fix(Share): Added mock for font-awesome for unit tests

src/__mocks__/@fortawesome/react-fontawesome.js

@@ -0,0 +1,5 @@
+import React from 'react';
+
+export function FontAwesomeIcon(props) {
+  return <i className="fa" />;
+}

src/components/Share/Share.js

@@ -18,7 +18,7 @@ function Share(props) {
   return (
     <>
       <a className={'button'} rel="noopener noreferrer" onClick={handleSharing}>
-        <FontAwesomeIcon className="icon" icon="fas fa-share-nodes" />
+        <FontAwesomeIcon className="icon" icon={['fas', 'fa-share-nodes']} />
       </a>
     </>
   );

src/components/Share/__test__/Share.test.js

@@ -1,12 +1,12 @@
 import Share from '../Share';
 import React from 'react';
-import ReactDOM from 'react-dom';
 import renderer from 'react-test-renderer';
+import { render } from 'react-dom';
 
 describe('<Share />', () => {
   test('renders without exploding', () => {
     const div = document.createElement('div');
-    ReactDOM.render(<Share />, div);
+    render(<Share />, div);
   });
   test('<Share /> snapshot', () => {
     const tree = renderer.create(<Share />).toJSON();

src/components/Share/__test__/__snapshots__/Share.test.js.snap

@@ -5,5 +5,9 @@ exports[`<Share /> <Share /> snapshot 1`] = `
   className="button"
   onClick={[Function]}
   rel="noopener noreferrer"
-/>
+>
+  <i
+    className="fa"
+  />
+</a>
 `;