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() {

   waitForExplicitFinish();

   // establish initial state

   is(gBrowser.tabs.length, 1, "we start with one tab");

   // create a tab

   let tab = gBrowser.loadOneTab("about:blank");

   ok(!tab.hidden, "tab starts out not hidden");

   is(gBrowser.tabs.length, 2, "we now have two tabs");

   // make sure .hidden is read-only

   tab.hidden = true; 

   ok(!tab.hidden, "can't set .hidden directly");

   // hide the tab

   gBrowser.hideTab(tab);

   ok(tab.hidden, "tab is hidden");

   // now pin it and make sure it gets unhidden

   gBrowser.pinTab(tab);

   ok(tab.pinned, "tab was pinned");

   ok(!tab.hidden, "tab was unhidden");

   // try hiding it now that it's pinned; shouldn't be able to

   gBrowser.hideTab(tab);

   ok(!tab.hidden, "tab did not hide");

   // clean up

   gBrowser.removeTab(tab);

   is(gBrowser.tabs.length, 1, "we finish with one tab");

   finish();

 }