| // 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: > |
| If target is extensible, return the non-falsy trap result if it contains all |
| of target's non-configurable keys. |
| info: | |
| [[OwnPropertyKeys]] ( ) |
| |
| ... |
| 18. If extensibleTarget is true, return trapResult. |
| features: [Proxy] |
| ---*/ |
| |
| var target = {}; |
| |
| Object.defineProperty(target, "foo", { |
| configurable: false, |
| enumerable: true, |
| value: true |
| }); |
| |
| var p = new Proxy(target, { |
| ownKeys: function() { |
| return ["foo", "bar"]; |
| } |
| }); |
| |
| var keys = Object.getOwnPropertyNames(p); |
| |
| assert.sameValue(keys[0], "foo"); |
| assert.sameValue(keys[1], "bar"); |
| |
| assert.sameValue(keys.length, 2); |