The Tor Browser / file revision

 /* 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";

 // Resize to a small window, open a new window, check that new window handles overflow properly

 add_task(function() {

   let originalWindowWidth = window.outerWidth;

   let navbar = document.getElementById(CustomizableUI.AREA_NAVBAR);

   ok(!navbar.hasAttribute("overflowing"), "Should start with a non-overflowing toolbar.");

   let oldChildCount = navbar.customizationTarget.childElementCount;

   window.resizeTo(400, window.outerHeight);

   yield waitForCondition(() => navbar.hasAttribute("overflowing"));

   ok(navbar.hasAttribute("overflowing"), "Should have an overflowing toolbar.");

   ok(navbar.customizationTarget.childElementCount < oldChildCount, "Should have fewer children.");

   let newWindow = yield openAndLoadWindow();

   let otherNavBar = newWindow.document.getElementById(CustomizableUI.AREA_NAVBAR);

   yield waitForCondition(() => otherNavBar.hasAttribute("overflowing"));

   ok(otherNavBar.hasAttribute("overflowing"), "Other window should have an overflowing toolbar.");

   yield promiseWindowClosed(newWindow);

   window.resizeTo(originalWindowWidth, window.outerHeight);

   yield waitForCondition(() => !navbar.hasAttribute("overflowing"));

   ok(!navbar.hasAttribute("overflowing"), "Should no longer have an overflowing toolbar.");

 });

 add_task(function asyncCleanup() {

   yield resetCustomization();

 });