added files

tests/__mocks__/browserMocks.js

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+// Mock Browser API's which are not supported by JSDOM, e.g. ServiceWorker, LocalStorage
+/**
+ * An example how to mock localStorage is given below 👇
+ */
+
+/*
+// Mocks localStorage
+const localStorageMock = (function() {
+	let store = {};
+
+	return {
+		getItem: (key) => store[key] || null,
+		setItem: (key, value) => store[key] = value.toString(),
+		clear: () => store = {}
+	};
+
+})();
+
+Object.defineProperty(window, 'localStorage', {
+	value: localStorageMock
+}); */

tests/__mocks__/fileMocks.js

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+// This fixed an error related to the CSS and loading gif breaking my Jest test
+// See https://facebook.github.io/jest/docs/en/webpack.html#handling-static-assets
+module.exports = 'test-file-stub';

tests/__mocks__/setupTests.js

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+import { configure } from 'enzyme';
+import Adapter from 'enzyme-adapter-preact-pure';
+
+configure({
+	adapter: new Adapter()
+});