The Tor Browser / file revision

 /* Any copyright is dedicated to the Public Domain.

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

 function test() {

   function onLoad(win) {

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

     win.gBrowser.addTab();

   }

   function onShow(win) {

     let cw = win.TabView.getContentWindow();

     let group = cw.GroupItems.groupItems[0];

     // shrink the group to make some room for dragging

     group.setSize(200, 200, true);

     waitForFocus(function () {

       let target = group.getChild(0).container;

       EventUtils.synthesizeMouseAtCenter(target, {type: "mousedown"}, cw);

       EventUtils.synthesizeMouse(target, 0, 300, {type: "mousemove"}, cw);

       EventUtils.synthesizeMouseAtCenter(target, {type: "mouseup"}, cw);

       let newGroup = cw.GroupItems.groupItems[1];

       let groupBounds = newGroup.getBounds();

       let safeWindowBounds = cw.Items.getSafeWindowBounds();

       ok(safeWindowBounds.contains(groupBounds),

          "new group is within safe window bounds");

       finish();

     }, cw);

   }

   waitForExplicitFinish();

   newWindowWithTabView(onShow, onLoad);

 }