Add enzyme dependency for frontend tests

Signed-off-by: Carlos Martín <carlos.martin.sanchez@gmail.com>

Author: carlosms

frontend/package.json

@@ -28,6 +28,8 @@
     "format": "eslint --fix 'src/**/*.js'"
   },
   "devDependencies": {
+    "enzyme": "^3.7.0",
+    "enzyme-adapter-react-16": "^1.7.0",
     "eslint-config-airbnb-base": "^12.1.0",
     "eslint-config-prettier": "^2.9.0",
     "eslint-plugin-jest": "^21.15.1",

frontend/src/setupTests.js

@@ -1,8 +1,12 @@
 import path from 'path';
 import os from 'os';
 import 'abortcontroller-polyfill/dist/polyfill-patch-fetch';
+import { configure } from 'enzyme';
+import Adapter from 'enzyme-adapter-react-16';
 import initButtonStyles from './utils/bootstrap';
 
+configure({ adapter: new Adapter() });
+
 const { LocalStorage } = require('node-localstorage');
 // URL API for node
 const { URL } = require('whatwg-url');