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/. */

 function test() {

   // Add two new tabs after the original tab. Pin the first one.

   let originalTab = gBrowser.selectedTab;

   let newTab1 = gBrowser.addTab();

   let newTab2 = gBrowser.addTab();

   gBrowser.pinTab(newTab1);

   // Check that there is only one closable tab from originalTab to the end

   is(gBrowser.getTabsToTheEndFrom(originalTab).length, 1,

     "One unpinned tab to the right");

   // Remove tabs to the end

   gBrowser.removeTabsToTheEndFrom(originalTab);

   is(gBrowser.tabs.length, 2, "Length is 2");

   is(gBrowser.tabs[1], originalTab, "Starting tab is not removed");

   is(gBrowser.tabs[0], newTab1, "Pinned tab is not removed");

   // Remove pinned tab

   gBrowser.removeTab(newTab1);

 }