The Tor Browser / file revision

 /* This Source Code Form is subject to the terms of the Mozilla Public

  * License, v. 2.0. If a copy of the MPL was not distributed with this

  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

 let testPage = "data:text/plain,test bug 491431 Page";

 function test() {

   waitForExplicitFinish();

   let newWin, tabA, tabB;

   // test normal close

   tabA = gBrowser.addTab(testPage);

   gBrowser.tabContainer.addEventListener("TabClose", function(aEvent) {

     gBrowser.tabContainer.removeEventListener("TabClose", arguments.callee, true);

     ok(!aEvent.detail, "This was a normal tab close");

     // test tab close by moving

     tabB = gBrowser.addTab(testPage);

     gBrowser.tabContainer.addEventListener("TabClose", function(aEvent) {

       gBrowser.tabContainer.removeEventListener("TabClose", arguments.callee, true);

       executeSoon(function() {

         ok(aEvent.detail, "This was a tab closed by moving");

         // cleanup

         newWin.close();

         executeSoon(finish);

       });

     }, true);

     newWin = gBrowser.replaceTabWithWindow(tabB);

   }, true);

   gBrowser.removeTab(tabA);

 }