add unit tests

Author: jschuler

__mocks__/fileMock.js

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+/* eslint-env node */
+module.exports = 'test-file-stub';

__mocks__/i18next.js

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+/* eslint-env node */
+const dependency = require.requireActual('i18next');
+module.exports = {
+  ...dependency,
+  default: {
+    ...dependency.default,
+    use() {
+      return this;
+    },
+    init: () => Promise.resolve(),
+    t: (key) => (key?.indexOf('~') !== -1 ? key.substring(key.indexOf('~') + 1) : key),
+  },
+};

__mocks__/localStorage.ts

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+let _localStorage = {};
+
+(window as any).localStorage = (window as any).sessionStorage = {
+  setItem(key: string, value: string) {
+    Object.assign(_localStorage, { [key]: value });
+  },
+  getItem(key: string): string | null {
+    return _localStorage.hasOwnProperty(key) ? _localStorage[key] : null;
+  },
+  clear() {
+    _localStorage = {};
+  },
+};

__mocks__/matchMedia.js

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+window.matchMedia = () => ({ matches: true });

__mocks__/mutationObserver.js

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+/* eslint-disable */
+
+global.MutationObserver = class {
+  constructor(callback) {}
+  disconnect() {}
+  observe(element, initObject) {}
+};

__mocks__/react-i18next.js

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+/* eslint-env node */
+const reactI18next = require.requireActual('react-i18next');
+module.exports = {
+  ...reactI18next,
+  useTranslation: () => ({
+    t: (key) => (key?.indexOf('~') !== -1 ? key.substring(key.indexOf('~') + 1) : key),
+  }),
+};

__mocks__/serverFlags.js

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+window.SERVER_FLAGS = {
+  basePath: '/',
+  consolePlugins: [],
+};

__mocks__/styleMock.js

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+/* eslint-env node */
+module.exports = {};

__mocks__/websocket.js

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+/* eslint-disable */
+import { WebSocket } from 'mock-socket';
+
+global.WebSocket = WebSocket;

before-tests.js

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+/* eslint-env node */
+
+import { configure } from 'enzyme';
+import * as Adapter from 'enzyme-adapter-react-16';
+
+import 'url-search-params-polyfill';
+
+// http://airbnb.io/enzyme/docs/installation/index.html#working-with-react-16
+configure({ adapter: new Adapter() });