created test for Diffroute jsx

Author: nmwenz90

src/app/__tests__/DiffRoute.test.jsx

@@ -0,0 +1,16 @@
+import React from 'react';
+import { configure, shallow } from 'enzyme'
+import Adapter from 'enzyme-adapter-react-16';
+import {
+  MemoryRouter as Router, Route, NavLink, Switch,
+} from 'react-router-dom';
+
+import DiffRoute from '../components/DiffRoute.jsx';
+
+
+configure({ adapter: new Adapter() });
+
+// check if our component has a component tag router
+// check if router component has a dive with a navlik component
+// check if component has a switch tag
+// check if routes in switch have appropriate props