@yeutech-lab/test-polyfill/lib/index.js

Configure unit test in jest using this polyfill. It provides fetch and localStorage within your test environment.

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.polyfill = polyfill;

var _objectSpread2 = _interopRequireDefault(require("@babel/runtime/helpers/objectSpread"));

var defaultOptions = {
  isomorphicFetch: false,
  fetch: true,
  localStorage: true,
  media: true
};

function polyfill(options) {
  var opts = (0, _objectSpread2.default)({}, defaultOptions, options);
  var root = null;

  try {
    root = window || global;
  } catch (e) {
    root = global;
  }

  if (opts.isomorphicFetch) {
    var Tough = require('tough-cookie');

    var Store = new Tough.MemoryCookieStore();
    var rejectPublicSuffixes = false;
    var cookieJar = new Tough.CookieJar(Store, rejectPublicSuffixes);

    var fetch = require('fetch-cookie')(require('@yeutech-lab/isomorphic-fetch'), cookieJar);

    root.fetch = fetch;
    root.cookieJar = cookieJar;
  }

  if (opts.fetch && !opts.isomorphicFetch) {
    require('whatwg-fetch');

    root.fetchMock = require('fetch-mock');
  }

  if (opts.localStorage && !root.localStorage) {
    root.localStorage = require('localStorage');
  }

  if (opts.media) {
    root.matchMedia = root.matchMedia || function () {
      return {
        matches: false,
        addListener: function addListener() {},
        removeListener: function removeListener() {}
      };
    };

    root.requestAnimationFrame = root.requestAnimationFrame || function (callback) {
      setTimeout(callback, 0);
    };
  }
}