diff -r 000000000000 -r 6474c204b198 dom/tests/mochitest/notification/desktop-notification/notification_common.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/tests/mochitest/notification/desktop-notification/notification_common.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,69 @@
+const MOCK_ALERTS_CID = SpecialPowers.wrap(SpecialPowers.Components).ID("{48068bc2-40ab-4904-8afd-4cdfb3a385f3}");
+const ALERTS_SERVICE_CONTRACT_ID = "@mozilla.org/alerts-service;1";
+
+const MOCK_SYSTEM_ALERTS_CID = SpecialPowers.wrap(SpecialPowers.Components).ID("{e86d888c-e41b-4b78-9104-2f2742a532de}");
+const SYSTEM_ALERTS_SERVICE_CONTRACT_ID = "@mozilla.org/system-alerts-service;1";
+
+var registrar = SpecialPowers.wrap(SpecialPowers.Components).manager.
+  QueryInterface(SpecialPowers.Ci.nsIComponentRegistrar);
+
+var mockAlertsService = {
+  showAlertNotification: function(imageUrl, title, text, textClickable,
+                                  cookie, alertListener, name, bidi, lang) {
+    // probably should do this async....
+    SpecialPowers.wrap(alertListener).observe(null, "alertshow", cookie);
+
+    if (SpecialPowers.getBoolPref("notification.prompt.testing.click_on_notification") == true) {
+       SpecialPowers.wrap(alertListener).observe(null, "alertclickcallback", cookie);
+    }
+
+    SpecialPowers.wrap(alertListener).observe(null, "alertfinished", cookie);
+  },
+
+  showAppNotification: function(imageUrl, title, text, alertListener, details) {
+    this.showAlertNotification(imageUrl, title, text, details.textClickable, "",
+                               alertListener, details.name, details.dir, details.lang);
+  },
+
+  QueryInterface: function(aIID) {
+    if (SpecialPowers.wrap(aIID).equals(SpecialPowers.Ci.nsISupports) ||
+        SpecialPowers.wrap(aIID).equals(SpecialPowers.Ci.nsIAlertsService) ||
+        SpecialPowers.wrap(aIID).equals(SpecialPowers.Ci.nsIAppNotificationService)) {
+      return this;
+    }
+    throw SpecialPowers.Components.results.NS_ERROR_NO_INTERFACE;
+  },
+
+  createInstance: function(aOuter, aIID) {
+    if (aOuter != null) {
+      throw SpecialPowers.Components.results.NS_ERROR_NO_AGGREGATION;
+    }
+    return this.QueryInterface(aIID);
+  }
+};
+mockAlertsService = SpecialPowers.wrapCallbackObject(mockAlertsService);
+
+function setup_notifications(allowPrompt, forceClick, callback) {
+  SpecialPowers.pushPrefEnv({'set': [["notification.prompt.testing", true],
+                                     ["notification.prompt.testing.allow", allowPrompt],
+                                     ["notification.prompt.testing.click_on_notification", forceClick]]},
+                            callback);
+
+  registrar.registerFactory(MOCK_SYSTEM_ALERTS_CID, "system alerts service",
+                            SYSTEM_ALERTS_SERVICE_CONTRACT_ID,
+                            mockAlertsService);
+
+  registrar.registerFactory(MOCK_ALERTS_CID, "alerts service",
+                            ALERTS_SERVICE_CONTRACT_ID,
+                            mockAlertsService);
+}
+
+function reset_notifications() {
+  registrar.unregisterFactory(MOCK_SYSTEM_ALERTS_CID, mockAlertsService);
+  registrar.unregisterFactory(MOCK_ALERTS_CID, mockAlertsService);
+}
+
+function is_feature_enabled() {
+  return navigator.mozNotification && SpecialPowers.getBoolPref("notification.feature.enabled");
+}
+