tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
Log | Files | Refs | README | LICENSE

not-extensible-new-keys-throws.js (720B)

      1 // Copyright (C) 2015 the V8 project authors. All rights reserved.
      2 // This code is governed by the BSD license found in the LICENSE file.
      3 /*---
      4 esid: sec-proxy-object-internal-methods-and-internal-slots-ownpropertykeys
      5 description: >
      6    If target is not extensible, the result can't contain keys names not
      7    contained in the target object.
      8 info: |
      9    [[OwnPropertyKeys]] ( )
     10 
     11    ...
     12    20. If uncheckedResultKeys is not empty, throw a TypeError exception.
     13 features: [Proxy]
     14 ---*/
     15 
     16 var target = {
     17  foo: 1
     18 };
     19 
     20 var p = new Proxy(target, {
     21  ownKeys: function() {
     22    return ["foo", "bar"];
     23  }
     24 });
     25 
     26 Object.preventExtensions(target);
     27 
     28 assert.throws(TypeError, function() {
     29  Object.keys(p);
     30 });
     31 
     32 reportCompare(0, 0);