diff -r 000000000000 -r 6474c204b198 browser/components/customizableui/test/browser_987177_destroyWidget_xul.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/components/customizableui/test/browser_987177_destroyWidget_xul.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,33 @@
+/* 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.");
+});
+