gecko/js/xpconnect/tests/unit/test_bug780370.js

24 lines
1.1 KiB
JavaScript

/* 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/. */
/* See https://bugzilla.mozilla.org/show_bug.cgi?id=780370 */
const Cu = Components.utils;
// Use a COW to expose a function from a standard prototype, and make sure it's
// still remapped.
function run_test()
{
var sb = Cu.Sandbox("http://www.example.com");
sb.obj = { foo: 42, __exposedProps__: { hasOwnProperty: 'r' } };
do_check_eq(Cu.evalInSandbox('typeof obj.foo', sb), 'undefined', "COW works as expected");
do_check_true(Cu.evalInSandbox('obj.hasOwnProperty === Object.prototype.hasOwnProperty', sb),
"Remapping happens even when the property is explicitly exposed");
// NB: We used to test for the following, but such behavior became very
// difficult to implement in a recent refactor. We're moving away from this
// API anyway, so we decided to explicitly drop support for this.
// do_check_eq(Cu.evalInSandbox('Object.prototype.bar = 10; obj.bar', sb), 10);
}