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/. */

 const Cc = Components.classes;

 const Ci = Components.interfaces;

 function run_test() {

   // Load the component manifest.

   Components.manager.autoRegister(do_get_file('../components/js/xpctest.manifest'));

   // Test for each component.

   test_property_throws("@mozilla.org/js/xpc/test/js/Bug809674;1");

 }

 function test_property_throws(contractid) {

   // Instantiate the object.

   var o = Cc[contractid].createInstance(Ci["nsIXPCTestBug809674"]);

   // Test the initial values.

   try {

     o.jsvalProperty;

     do_check_true(false, "Should have thrown");

   } catch (e) {

     do_check_true(/implicit_jscontext/.test(e), "Should throw a helpful error");

   }

 }