jest.setup.js

import "./polyfills";
import Enzyme from "enzyme";
import Adapter from "enzyme-adapter-react-16";
import createGoogleMapsMock from "jest-google-maps-mock";
import MockDate from "mockdate";

import "./polyfills";

Enzyme.configure({ adapter: new Adapter() });

MockDate.set("2018-01-01T00:00:00", -780);

Object.defineProperties(global, {
  API_URL: { value: "http://localhost/api", writable: true },
});

delete window.location;
window.location = {
  assign: jest.fn(),
  hash: "",
  host: "localhost",
  hostname: "localhost",
  href: "http://localhost",
  origin: "http://localhost",
  pathname: "",
  port: 80,
  protocol: "http:",
  reload: jest.fn(),
  search: "",
};

Object.defineProperties(window, {
  dataLayer: {
    value: [],
    writable: true,
  },
  google: {
    value: {
      maps: createGoogleMapsMock(),
    },
    writable: true,
  },
  requestAnimationFrame: {
    value: (callback) => setTimeout(callback, 0),
    writable: true,
  },
  scrollTo: {
    value: jest.fn(),
    writable: true,
  },
});

Object.defineProperty(navigator, "language", {
  value: "en-NZ",
});

const serviceWorkerEvents = {};
Object.defineProperty(window.navigator, "serviceWorker", {
  value: {
    addEventListener: jest.fn((event, handler) => {
      if (!serviceWorkerEvents[event]) {
        serviceWorkerEvents[event] = [];
      }
      serviceWorkerEvents[event].push(handler);
    }),
    controller: {
      postMessage: jest.fn(),
      state: "activated",
    },
    dispatchEvent: jest.fn((event) => {
      if (serviceWorkerEvents[event.type]) {
        serviceWorkerEvents[event.type].forEach((handler) => {
          handler(event);
        });
      }
    }),
    register: jest.fn(),
    removeEventListener: jest.fn((event, handler) => {
      if (serviceWorkerEvents[event]) {
        serviceWorkerEvents[event].forEach((boundHandler, index) => {
          if (handler === boundHandler) {
            serviceWorkerEvents[event].splice(index, 1);
          }
        });
      }
    }),
  },
  writable: true,
});