| // Copyright (C) 2016 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-setprototypeof-v |
| description: > |
| Calls target.[[GetPrototypeOf]] after trap result as false and not extensible |
| target |
| info: | |
| [[SetPrototypeOf]] (V) |
| |
| 8. Let booleanTrapResult be ToBoolean(? Call(trap, handler, « target, V »)). |
| 9. If booleanTrapResult is false, return false. |
| 10. Let extensibleTarget be ? IsExtensible(target). |
| 11. If extensibleTarget is true, return true. |
| 12. Let targetProto be ? target.[[GetPrototypeOf]](). |
| features: [Proxy, Reflect, Reflect.setPrototypeOf] |
| ---*/ |
| |
| var calls = []; |
| var proto = {}; |
| |
| var target = new Proxy(Object.create(proto), { |
| isExtensible: function() { |
| calls.push("target.[[IsExtensible]]"); |
| return false; |
| }, |
| getPrototypeOf: function() { |
| calls.push("target.[[GetPrototypeOf]]"); |
| return proto; |
| } |
| }); |
| |
| // Proxy must report same extensiblitity as target |
| Object.preventExtensions(target); |
| |
| var proxy = new Proxy(target, { |
| setPrototypeOf: function() { |
| calls.push("proxy.[[setPrototypeOf]]"); |
| return true; |
| } |
| }); |
| |
| assert.sameValue(Reflect.setPrototypeOf(proxy, proto), true); |
| assert.sameValue(calls.length, 3); |
| assert.sameValue(calls[0], "proxy.[[setPrototypeOf]]"); |
| assert.sameValue(calls[1], "target.[[IsExtensible]]"); |
| assert.sameValue(calls[2], "target.[[GetPrototypeOf]]"); |