chrome/test/data/notifications/notification_test_utils.js

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 // Returns a promise that will be resolved with an activated Service
   6 // Worker, or rejects when the Service Worker could not be started. There
   7 // will be a message port to and from the worker in |messagePort|.
   8 function GetActivatedServiceWorker(script, scope) {
   9   return navigator.serviceWorker.getRegistration(scope)
  10       .then(function(registration) {
  11         // Unregister any existing Service Worker.
  12         if (registration)
  13           return registration.unregister();
  14       }).then(function() {
  15         // Register the Service Worker again.
  16         return navigator.serviceWorker.register(script, { scope: scope });
  17       }).then(function(registration) {
  18         if (registration.active) {
  19           return registration;
  20         } else if (registration.waiting || registration.installing) {
  21           var worker = registration.waiting || registration.installing;
  22           return new Promise(function(resolve) {
  23             worker.addEventListener('statechange', function () {
  24               if (worker.state === 'activated')
  25                 resolve(registration);
  26             });
  27           });
  28         } else {
  29           return Promise.reject('Service Worker in invalid state.');
  30         }
  31       }).then(function(registration) {
  32         return new Promise(function(resolve) {
  33           var channel = new MessageChannel();
  34           channel.port1.addEventListener('message', function(event) {
  35             if (event.data == 'ready')
  36               resolve(registration);
  37           });
  38
  39           registration.active.postMessage(channel.port2,
  40                                           [ channel.port2 ]);
  41
  42           messagePort = channel.port1;
  43           messagePort.start();
  44         });
  45       });
  46 }