diff -r 000000000000 -r 6474c204b198 browser/components/tabview/test/browser_tabview_bug641802.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/components/tabview/test/browser_tabview_bug641802.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,65 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function test() {
+  let openMoveToGroupPopup = function () {
+    let tab = gBrowser.selectedTab;
+    var evt = new Event("");
+    tab.dispatchEvent(evt);
+    contextMenu.openPopup(tab, "end_after", 0, 0, true, false, evt);
+    tvMenuPopup.openPopup(tvMenu, "end_after", 0, 0, true, false);
+  }
+
+  let hideMoveToGroupPopup = function () {
+    tvMenuPopup.hidePopup();
+    contextMenu.hidePopup();
+  }
+
+  let assertValidPrerequisites = function (visible) {
+    let cw = TabView.getContentWindow();
+    is(cw.GroupItems.groupItems.length, 1, "there is one groupItem");
+    is(gBrowser.tabs.length, 1, "there is one tab");
+    is(TabView.isVisible(), visible, "tabview is visible");
+  }
+
+  let tvMenu = document.getElementById("context_tabViewMenu");
+  let contextMenu = document.getElementById("tabContextMenu");
+  let tvMenuPopup = document.getElementById("context_tabViewMenuPopup");
+
+  waitForExplicitFinish();
+
+  registerCleanupFunction(function () {
+    hideMoveToGroupPopup();
+    hideTabView();
+
+    let groupItems = TabView.getContentWindow().GroupItems.groupItems;
+    if (groupItems.length > 1)
+      closeGroupItem(groupItems[0]);
+  });
+
+  showTabView(function () {
+    assertValidPrerequisites(true);
+
+    hideTabView(function () {
+      let groupItem = createGroupItemWithBlankTabs(window, 200, 200, 10, 1);
+      groupItem.setTitle("group2");
+
+      gBrowser.selectedTab = gBrowser.tabs[0];
+
+      executeSoon(function () {
+        openMoveToGroupPopup();
+        is(tvMenuPopup.firstChild.getAttribute("label"), "group2", "menuItem is present");
+        hideMoveToGroupPopup();
+
+        closeGroupItem(groupItem, function () {
+          openMoveToGroupPopup();
+          is(tvMenuPopup.firstChild.tagName, "menuseparator", "menuItem is not present");
+          hideMoveToGroupPopup();
+
+          assertValidPrerequisites(false);
+          finish();
+        });
+      });
+    });
+  });
+}