The Tor Browser / file revision

 /* Any copyright is dedicated to the Public Domain.

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

 function test() {

   let checkUpdateTimes = function (groupItem) {

     let children = groupItem.getChildren();

     let earliestUpdateTime = children.shift()._testLastTabUpdateTime;

     children.forEach(function (tabItem) {

       let updateTime = tabItem._testLastTabUpdateTime;

       ok(earliestUpdateTime <= updateTime, "Stacked group item update (" +

          updateTime + ") > first item (" + earliestUpdateTime + ")");

     });

   }

   waitForExplicitFinish();

   newWindowWithTabView(function (win) {

     registerCleanupFunction(function () win.close());

     let numTabsToUpdate = 10;

     let groupItem = createGroupItemWithBlankTabs(win, 150, 150, 100, numTabsToUpdate, false);

     ok(groupItem.isStacked(), "groupItem is stacked");

     let cw = win.TabView.getContentWindow();

     cw.TabItems.pausePainting();

     groupItem.getChildren().forEach(function (tabItem) {

       tabItem.addSubscriber("updated", function onUpdated() {

         tabItem.removeSubscriber("updated", onUpdated);

         tabItem._testLastTabUpdateTime = tabItem._lastTabUpdateTime;

         if (--numTabsToUpdate)

           return;

         checkUpdateTimes(groupItem);

         finish();

       });

       cw.TabItems.update(tabItem.tab);

     });

     cw.TabItems.resumePainting();

   });

 }