The Tor Browser / file revision

 /* Any copyright is dedicated to the Public Domain.

    http://creativecommons.org/publicdomain/zero/1.0/ */

 function test() {

   waitForExplicitFinish();

   window.addEventListener("tabviewshown", onTabViewWindowLoaded, false);

   TabView.toggle();

 }

 function onTabViewWindowLoaded() {

   window.removeEventListener("tabviewshown", onTabViewWindowLoaded, false);

   ok(TabView.isVisible(), "Tab View is visible");

   let [originalTab] = gBrowser.visibleTabs;

   let contentWindow = document.getElementById("tab-view").contentWindow;

   // create group which we'll close

   let box1 = new contentWindow.Rect(310, 10, 300, 300);

   let group1 = new contentWindow.GroupItem([], { bounds: box1 });

   ok(group1.isEmpty(), "This group is empty");

   contentWindow.UI.setActive(group1);

   let tab1 = gBrowser.loadOneTab("about:blank#1", {inBackground: true});

   let tab1Item = tab1._tabViewTabItem;

   ok(group1.getChildren().some(function(child) child == tab1Item), "The tab was made in our new group");

   is(group1.getChildren().length, 1, "Only one tab in the first group");

   group1.addSubscriber("close", function onClose() {

     group1.removeSubscriber("close", onClose);

     let onTabViewHidden = function() {

       window.removeEventListener("tabviewhidden", onTabViewHidden, false);

       // assert that we're no longer in tab view

       ok(!TabView.isVisible(), "Tab View is hidden");

       finish();

     };

     window.addEventListener("tabviewhidden", onTabViewHidden, false);

     // delay to give time for hidden group DOM element to be removed so

     // the appropriate group would get selected when the key

     // combination is pressed

     executeSoon(function() { 

       EventUtils.synthesizeKey("e", {accelKey : true, shiftKey: true}, contentWindow);

     });

   });

   hideGroupItem(group1, function () {

     // close undo group

     let closeButton = group1.$undoContainer.find(".close");

     EventUtils.sendMouseEvent(

       { type: "click" }, closeButton[0], contentWindow);

   });

 }