| // Copyright (C) 2015 the V8 project authors. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| /*--- |
| esid: sec-proxy-object-internal-methods-and-internal-slots-ownpropertykeys |
| description: > |
| The result List must contain the keys of all non-configurable own properties |
| of the target object. |
| info: | |
| [[OwnPropertyKeys]] ( ) |
| |
| ... |
| 17. For each key that is an element of targetNonconfigurableKeys, do |
| a. If key is not an element of uncheckedResultKeys, throw a TypeError |
| exception. |
| |
| features: [Proxy] |
| ---*/ |
| |
| var target = { |
| foo: 1 |
| }; |
| |
| Object.defineProperty(target, "attr", { |
| configurable: false, |
| enumerable: true, |
| value: true |
| }); |
| |
| var p = new Proxy(target, { |
| ownKeys: function() { |
| return ["foo"]; |
| } |
| }); |
| |
| assert.throws(TypeError, function() { |
| Object.keys(p); |
| }); |