Bug 967000 - add test for panel menu non-default buttons: sync. r=Gijs

browser/components/customizableui/test/browser.ini

@@ -71,6 +71,7 @@ skip-if = os == "linux"
 [browser_963639_customizing_attribute_non_customizable_toolbar.js]
 [browser_967000_button_charEncoding.js]
 [browser_967000_button_feeds.js]
+[browser_967000_button_sync.js]
 [browser_968447_bookmarks_toolbar_items_in_panel.js]
 [browser_968565_insert_before_hidden_items.js]
 [browser_969427_recreate_destroyed_widget_after_reset.js]

browser/components/customizableui/test/browser_967000_button_sync.js

@@ -0,0 +1,44 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+let initialLocation = gBrowser.currentURI.spec;
+let newTab = null;
+
+add_task(function() {
+  info("Check Sync button functionality");
+
+  // add the Sync button to the panel
+  CustomizableUI.addWidgetToArea("sync-button", CustomizableUI.AREA_PANEL);
+
+  // check the button's functionality
+  yield PanelUI.show();
+
+  let syncButton = document.getElementById("sync-button");
+  ok(syncButton, "The Sync button was added to the Panel Menu");
+  syncButton.click();
+
+  newTab = gBrowser.selectedTab;
+  yield promiseTabLoadEvent(newTab, "about:accounts");
+
+  is(gBrowser.currentURI.spec, "about:accounts", "Firefox Sync page opened");
+  ok(!isPanelUIOpen(), "The panel closed");
+
+  if(isPanelUIOpen()) {
+    let panelHidePromise = promisePanelHidden(window);
+    PanelUI.hide();
+    yield panelHidePromise;
+  }
+});
+
+add_task(function asyncCleanup() {
+  // reset the panel UI to the default state
+  yield resetCustomization();
+  ok(CustomizableUI.inDefaultState, "The panel UI is in default state again.");
+
+  // restore the tabs
+  gBrowser.addTab(initialLocation);
+  gBrowser.removeTab(newTab);
+});