Push API: Return cached registration if available.

chrome/test/data/push_messaging/test.js

+var pushData = new FutureData();
+
+// Sends data back to the test. This must be in response to an earlier
+// request, but it's ok to respond asynchronously. The request blocks until
+// the response is sent.
+function sendResultToTest(result) {
+  console.log('sendResultToTest: ' + result);
+  if (window.domAutomationController) {
+    domAutomationController.send('' + result);
+  }
+}
+
+function sendErrorToTest(error) {
+  sendResultToTest(error.name + ' - ' + error.message);
+}
+
+// A container for a single piece of data. The data does not have to be
+// available yet when the getter is called, as all responses to the test are
+// asynchronous.
+function FutureData() {
+  this.data = null;
+  this.waiting = false;
+}
+
+// Sends the data to the test if it is available. Otherwise sets the
+// |waiting| flag.
+FutureData.prototype.get = function() {
+  if (this.data) {
+    sendResultToTest(this.data);
+  } else {
+    this.waiting = true;
+  }
+};
+
+// Sets a new data value. If the |waiting| flag is on, it is turned off and
+// the data is sent to the test.
+FutureData.prototype.set = function(data) {
+  this.data = data;
+  if (this.waiting) {
+    sendResultToTest(data);
+    this.waiting = false;
+  }
+};
+
+FutureData.prototype.getImmediately = function() {
+  sendResultToTest(this.data);
+};
+
+// Notification permission has been coalesced with Push permission. After
+// this is granted, Push API registration can succeed.
+function requestNotificationPermission() {
+  Notification.requestPermission(function(permission) {
+    sendResultToTest('permission status - ' + permission);
+  });
+}
+
+function registerServiceWorker() {
+  // The base dir used to resolve service_worker.js and the scope depends on
+  // whether this script is included from ./test.html, subscope1/test.html,
+  // or subscope2/test.html.
+  navigator.serviceWorker.register('service_worker.js', {scope: './'}).then(
+      function(swRegistration) {
+        sendResultToTest('ok - service worker registered');
+      }, sendErrorToTest);
+}
+
+function unregisterServiceWorker() {
+  navigator.serviceWorker.getRegistration().then(function(swRegistration) {
+    swRegistration.unregister().then(function(result) {
+      sendResultToTest('service worker unregistration status: ' + result);
+    })
+  }).catch(sendErrorToTest);
+}
+
+function removeManifest() {
+  var element = document.querySelector('link[rel="manifest"]');
+  if (element) {
+    element.parentNode.removeChild(element);
+    sendResultToTest('manifest removed');
+  } else
+    sendResultToTest('unable to find manifest element');
+}
+
+function registerPush() {
+  navigator.serviceWorker.ready.then(function(swRegistration) {
+    // TODO(mvanouwerkerk): Cleanup once the final API is exposed.
+    var pushManager = swRegistration.pushManager || navigator.push;
+    pushManager.register().then(function(pushRegistration) {
+      sendResultToTest(pushRegistration.pushEndpoint + ' - ' +
+          pushRegistration.pushRegistrationId);
+    }, sendErrorToTest);
+  }, sendErrorToTest);
+}
+
+function hasPermission() {
+  navigator.serviceWorker.ready.then(function(swRegistration) {
+    // TODO(mvanouwerkerk): Cleanup once the final API is exposed.
+    var pushManager = swRegistration.pushManager || navigator.push;
+    pushManager.hasPermission().then(function(permission) {
+      sendResultToTest('permission status - ' + permission);
+    }, sendErrorToTest);
+  }, sendErrorToTest);
+}
+
+function isControlled() {
+  if (navigator.serviceWorker.controller) {
+    sendResultToTest('true - is controlled');
+  } else {
+    sendResultToTest('false - is not controlled');
+  }
+}
+
+addEventListener('message', function(event) {
+  var message = JSON.parse(event.data);
+  if (message.type == 'push') {
+    pushData.set(message.data);
+  }
+}, false);