1 files changed, 59 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 0000000000..f4b5dfed7d
--- /dev/null
+++ b/browser/components/customizableui/test/browser_1087303_button_preferences.js
@@ -0,0 +1,59 @@
+/* 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/. */
+/* eslint-disable mozilla/no-arbitrary-setTimeout */
+
+"use strict";
+
+var newTab = null;
+
+add_task(async function() {
+  info("Check preferences button existence and functionality");
+  CustomizableUI.addWidgetToArea(
+    "preferences-button",
+    CustomizableUI.AREA_FIXED_OVERFLOW_PANEL
+  );
+  registerCleanupFunction(() => CustomizableUI.reset());
+
+  await waitForOverflowButtonShown();
+
+  await document.getElementById("nav-bar").overflowable.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;
+  await waitForPageLoad(newTab);
+
+  let openedPage = gBrowser.currentURI.spec;
+  is(openedPage, "about:preferences", "Preferences page was opened");
+});
+
+add_task(function asyncCleanup() {
+  if (gBrowser.tabs.length == 1) {
+    BrowserTestUtils.addTab(gBrowser, "about:blank");
+  }
+
+  gBrowser.removeTab(gBrowser.selectedTab);
+  info("Tabs were restored");
+});
+
+function waitForPageLoad(aTab) {
+  return new Promise((resolve, reject) => {
+    let timeoutId = setTimeout(() => {
+      aTab.linkedBrowser.removeEventListener("load", onTabLoad, true);
+      reject("Page didn't load within " + 20000 + "ms");
+    }, 20000);
+
+    async function onTabLoad(event) {
+      clearTimeout(timeoutId);
+      aTab.linkedBrowser.removeEventListener("load", onTabLoad, true);
+      info("Tab event received: load");
+      resolve();
+    }
+
+    aTab.linkedBrowser.addEventListener("load", onTabLoad, true, true);
+  });
+}