Updated jest for frontend

frontend/utils/setupJest.js

@@ -0,0 +1,11 @@
+/* eslint-disable */
+import React from 'react';
+import { shallow } from 'enzyme';
+import toJson from 'enzyme-to-json';
+
+const snap = children => {
+  const wrapper = shallow(children);
+  expect(toJson(wrapper)).toMatchSnapshot();
+};
+
+global.snap = snap;

frontend/utils/testUtils.js

@@ -1,10 +0,0 @@
-/* eslint-disable */
-import React from 'react';
-import renderer from 'react-test-renderer';
-
-const snap = children => {
-  const component = renderer.create(children);
-  expect(component).toMatchSnapshot();
-};
-
-export { snap };