The Tor Browser / file revision

 /* Any copyright is dedicated to the Public Domain.

  * http://creativecommons.org/publicdomain/zero/1.0/

  */

 // Tests that the AddonManager objects cannot be tampered with

 function run_test() {

   // Setup for test

   createAppInfo("xpcshell@tests.mozilla.org", "XPCShell", "1", "1.9.2");

   startupManager();

   // Verify that properties cannot be changed

   let old = AddonManager.STATE_AVAILABLE;

   AddonManager.STATE_AVAILABLE = 28;

   do_check_eq(AddonManager.STATE_AVAILABLE, old);

   // Verify that functions cannot be replaced

   AddonManager.isInstallEnabled = function() {

     do_throw("Should not be able to replace a function");

   }

   AddonManager.isInstallEnabled("application/x-xpinstall");

   // Verify that properties cannot be added

   AddonManager.foo = "bar";

   do_check_false("foo" in AddonManager);

 }