1 files changed, 50 insertions, 0 deletions
diff --git a/browser/components/customizableui/test/browser_1087303_button_preferences.js b/browser/components/customizableui/test/browser_1087303_button_preferences.js
new file mode 100644
index 000000000..b1fdb85b6
--- /dev/null
+++ b/browser/components/customizableui/test/browser_1087303_button_preferences.js
@@ -0,0 +1,50 @@
+/* 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";
+
+var newTab = null;
+
+add_task(function*() {
+  info("Check preferences button existence and functionality");
+
+  yield PanelUI.show();
+  info("Menu panel was opened");
+
+  let preferencesButton = document.getElementById("preferences-button");
+  ok(preferencesButton, "Preferences button exists in Panel Menu");
+  preferencesButton.click();
+
+  newTab = gBrowser.selectedTab;
+  yield waitForPageLoad(newTab);
+
+  let openedPage = gBrowser.currentURI.spec;
+  is(openedPage, "about:preferences", "Preferences page was opened");
+});
+
+add_task(function asyncCleanup() {
+  if (gBrowser.tabs.length == 1)
+    gBrowser.addTab("about:blank");
+
+  gBrowser.removeTab(gBrowser.selectedTab);
+  info("Tabs were restored");
+});
+
+function waitForPageLoad(aTab) {
+  let deferred = Promise.defer();
+
+  let timeoutId = setTimeout(() => {
+    aTab.linkedBrowser.removeEventListener("load", onTabLoad, true);
+    deferred.reject("Page didn't load within " + 20000 + "ms");
+  }, 20000);
+
+  function onTabLoad(event) {
+    clearTimeout(timeoutId);
+    aTab.linkedBrowser.removeEventListener("load", onTabLoad, true);
+    info("Tab event received: " + "load");
+    deferred.resolve();
+ }
+  aTab.linkedBrowser.addEventListener("load", onTabLoad, true, true);
+  return deferred.promise;
+}