diff -r 000000000000 -r 6474c204b198 browser/components/tabview/test/browser_tabview_bug630102.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/components/tabview/test/browser_tabview_bug630102.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,52 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function test() {
+  let win, contentWindow, originalTab, newTab1, newTab2;
+
+  let partOne = function () {
+    let groupItem = contentWindow.GroupItems.groupItems[0];
+    let tabItems = groupItem.getChildren();
+    is(tabItems.length, 2, "There are two tab items in that group item");
+    is(tabItems[0].tab, originalTab, "The first tab item is linked to the first tab");
+    is(tabItems[1].tab, newTab2, "The second tab item is linked to the second tab");
+
+    hideTabView(partTwo, win);
+  };
+
+  let partTwo = function () {
+    win.gBrowser.unpinTab(newTab1);
+    showTabView(partThree, win);
+  };
+
+  let partThree = function () {
+    let tabItems = contentWindow.GroupItems.groupItems[0].getChildren();
+    is(tabItems.length, 3, "There are three tab items in that group item");
+    is(tabItems[0].tab, win.gBrowser.tabs[0], "The first tab item is linked to the first tab");
+    is(tabItems[1].tab, win.gBrowser.tabs[1], "The second tab item is linked to the second tab");
+    is(tabItems[2].tab, win.gBrowser.tabs[2], "The third tab item is linked to the third tab");
+
+    finish();
+  };
+
+  let onLoad = function (tvwin) {
+    win = tvwin;
+    registerCleanupFunction(function () win.close());
+
+    for (let i = 0; i < 2; i++)
+      win.gBrowser.loadOneTab("about:blank", {inBackground: true});
+
+    [originalTab, newTab1, newTab2] = win.gBrowser.tabs;
+    win.gBrowser.pinTab(newTab1);
+  };
+
+  let onShow = function () {
+    contentWindow = win.TabView.getContentWindow();
+    is(contentWindow.GroupItems.groupItems.length, 1, "There is only one group item");
+
+    partOne();
+  };
+
+  waitForExplicitFinish();
+  newWindowWithTabView(onShow, onLoad);
+}