gecko/js/xpconnect/tests/unit/test_unload.js

/* 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 run_test() {
  var scope1 = {};
  var global1 = Components.utils.import("resource://gre/modules/NetUtil.jsm", scope1);

  var scope2 = {};
  var global2 = Components.utils.import("resource://gre/modules/NetUtil.jsm", scope2);

  do_check_true(global1 === global2);
  do_check_true(scope1.NetUtil === scope2.NetUtil);

  Components.utils.unload("resource://gre/modules/NetUtil.jsm");

  var scope3 = {};
  var global3 = Components.utils.import("resource://gre/modules/NetUtil.jsm", scope3);

  do_check_false(global1 === global3);
  do_check_false(scope1.NetUtil === scope3.NetUtil);

  // When the jsm was unloaded, the value of all its global's properties were
  // set to undefined. While it must be safe (not crash) to call into the
  // module, we expect it to throw an error (e.g., when trying to use Ci).
  try { scope1.NetUtil.newURI("http://www.example.com"); } catch (e) {}
  try { scope3.NetUtil.newURI("http://www.example.com"); } catch (e) {}
}