| // Copyright (C) 2015 the V8 project authors. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| /*--- |
| es6id: 9.5.1 |
| description: > |
| Return trap result is target is not extensible, but trap result has the same |
| value as target.[[GetPrototypeOf]] result. |
| info: | |
| [[GetPrototypeOf]] ( ) |
| |
| ... |
| 1. Let handler be the value of the [[ProxyHandler]] internal slot of O. |
| ... |
| 4. Let target be the value of the [[ProxyTarget]] internal slot of O. |
| 5. Let trap be GetMethod(handler, "getPrototypeOf"). |
| ... |
| 8. Let handlerProto be Call(trap, handler, «target»). |
| ... |
| 11. Let extensibleTarget be IsExtensible(target). |
| ... |
| 14. Let targetProto be target.[[GetPrototypeOf]](). |
| ... |
| 17. Return handlerProto. |
| |
| features: [Proxy] |
| ---*/ |
| |
| var target = Object.create(Array.prototype); |
| |
| var p = new Proxy(target, { |
| getPrototypeOf: function() { |
| return Array.prototype; |
| } |
| }); |
| |
| Object.preventExtensions(target); |
| |
| assert.sameValue(Object.getPrototypeOf(p), Array.prototype); |