diff -r 000000000000 -r 6474c204b198 browser/components/tabview/test/browser_tabview_bug597980.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/components/tabview/test/browser_tabview_bug597980.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,82 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function test() {
+  waitForExplicitFinish();
+
+  newWindowWithTabView(part1);
+}
+
+function part1(win) {
+  registerCleanupFunction(function() win.close());
+
+  let contentWindow = win.TabView.getContentWindow();
+  is(contentWindow.GroupItems.groupItems.length, 1, "Has only one group");
+
+  let originalTab = win.gBrowser.selectedTab;
+  let originalGroup = contentWindow.GroupItems.groupItems[0];
+  let newTab = win.gBrowser.loadOneTab("about:blank", {inBackground: true});
+  
+  is(originalGroup.getChildren().length, 2, "The original group now has two tabs");
+  
+  // create group two with the new tab
+  let box = new contentWindow.Rect(300,300,150,150);
+  let newGroup = new contentWindow.GroupItem([], {bounds: box, immediately: true});
+  newGroup.add(newTab._tabViewTabItem, {immediately: true});
+
+  // ensure active group item and tab
+  contentWindow.UI.setActive(originalGroup);
+  is(contentWindow.GroupItems.getActiveGroupItem(), originalGroup,
+     "The original group is active");
+  is(contentWindow.UI.getActiveTab(), originalTab._tabViewTabItem,
+     "The original tab is active");
+  
+  function checkActive(callback, time) {
+    is(contentWindow.GroupItems.getActiveGroupItem(), newGroup,
+       "The new group is active");
+    is(contentWindow.UI.getActiveTab(), newTab._tabViewTabItem,
+       "The new tab is active");
+    if (time)
+      setTimeout(callback, time);
+    else
+      callback();
+  }
+
+  // click on the new tab, and check that the new tab and group are active
+  // at two times: 10 ms after (still during the animation) and
+  // 500 ms after (after the animation, hopefully). Either way, the new
+  // tab and group should be active.
+  EventUtils.sendMouseEvent({ type: "mousedown" },
+                            newTab._tabViewTabItem.container, contentWindow);
+  EventUtils.sendMouseEvent({ type: "mouseup" },
+                            newTab._tabViewTabItem.container, contentWindow);
+  setTimeout(function() {
+    checkActive(function() {
+      checkActive(function() {
+        win.close();
+        newWindowWithTabView(part2);
+      });
+    }, 490);
+  }, 10)
+}
+
+function part2(win) {
+  registerCleanupFunction(function() win.close());
+
+  let newTab = win.gBrowser.loadOneTab("about:blank", {inBackground: true});
+  hideTabView(function() {
+    let selectedTab = win.gBrowser.selectedTab;
+    isnot(selectedTab, newTab, "They are different tabs");
+
+    // switch the selected tab to new tab
+    win.gBrowser.selectedTab = newTab;
+
+    showTabView(function () {
+      hideTabView(function () {
+        is(win.gBrowser.selectedTab, newTab,
+           "The selected tab should be the same as before (new tab)");
+        waitForFocus(finish);
+      }, win);
+    }, win);
+  }, win);
+}