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";

 const BUTTONID = "test-XUL-wrapper-destroyWidget";

 add_task(function() {

   let btn = createDummyXULButton(BUTTONID, "XUL btn");

   gNavToolbox.palette.appendChild(btn);

   let firstWrapper = CustomizableUI.getWidget(BUTTONID).forWindow(window);

   ok(firstWrapper, "Should get a wrapper");

   ok(firstWrapper.node, "Node should be there on first wrapper.");

   btn.remove();

   CustomizableUI.destroyWidget(BUTTONID);

   let secondWrapper = CustomizableUI.getWidget(BUTTONID).forWindow(window);

   isnot(firstWrapper, secondWrapper, "Wrappers should be different after destroyWidget call.");

   ok(!firstWrapper.node, "No node should be there on old wrapper.");

   ok(!secondWrapper.node, "No node should be there on new wrapper.");

   btn = createDummyXULButton(BUTTONID, "XUL btn");

   gNavToolbox.palette.appendChild(btn);

   let thirdWrapper = CustomizableUI.getWidget(BUTTONID).forWindow(window);

   ok(thirdWrapper, "Should get a wrapper");

   is(secondWrapper, thirdWrapper, "Should get the second wrapper again.");

   ok(firstWrapper.node, "Node should be there on old wrapper.");

   ok(secondWrapper.node, "Node should be there on second wrapper.");

   ok(thirdWrapper.node, "Node should be there on third wrapper.");

 });