Setup tests for usage with Enzyme

Author: Sean Prashad

web/package.json

@@ -7,10 +7,13 @@
     "@testing-library/jest-dom": "^4.2.4",
     "@testing-library/react": "^9.3.2",
     "@testing-library/user-event": "^7.1.2",
+    "enzyme": "^3.11.0",
+    "enzyme-adapter-react-16": "^1.15.2",
     "gh-pages": "^2.2.0",
     "react": "^16.12.0",
     "react-dom": "^16.12.0",
-    "react-scripts": "3.3.0"
+    "react-scripts": "3.3.0",
+    "react-test-renderer": "^16.12.0"
   },
   "devDependencies": {
     "babel-eslint": "^10.0.3",

web/src/setupTests.js

@@ -1,5 +1,4 @@
-// jest-dom adds custom jest matchers for asserting on DOM nodes.
-// allows you to do things like:
-// expect(element).toHaveTextContent(/react/i)
-// learn more: https://github.com/testing-library/jest-dom
-import '@testing-library/jest-dom/extend-expect';
+import { configure } from 'enzyme';
+import Adapter from 'enzyme-adapter-react-16';
+
+configure({ adapter: new Adapter() });