| // 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-setprototypeof-v |
| description: > |
| Return target.[[SetPrototypeOf]] (V) if trap is undefined or null. |
| info: | |
| [[SetPrototypeOf]] (V) |
| |
| 6. Let trap be ? GetMethod(handler, "setPrototypeOf"). |
| 7. If trap is undefined, then |
| a. Return ? target.[[SetPrototypeOf]](V). |
| |
| GetMethod (V, P) |
| |
| 2. Let func be ? GetV(V, P). |
| 3. If func is either undefined or null, return undefined. |
| features: [Proxy] |
| ---*/ |
| |
| var proxy, called, value; |
| var target = new Proxy({}, { |
| setPrototypeOf: function(t, v) { |
| called += 1; |
| value = v; |
| return true; |
| } |
| }); |
| var proto = {}; |
| |
| proxy = new Proxy(target, {}); |
| called = 0; |
| value = false; |
| Object.setPrototypeOf(proxy, proto); |
| assert.sameValue(called, 1, "undefined, target.[[SetPrototypeOf]] is called"); |
| assert.sameValue(value, proto, "undefined, called with V"); |
| |
| proxy = new Proxy(target, { |
| setPrototypeOf: null |
| }); |
| called = 0; |
| value = false; |
| Object.setPrototypeOf(proxy, proto); |
| assert.sameValue(called, 1, "null, target.[[SetPrototypeOf]] is called"); |
| assert.sameValue(value, proto, "null, called with V"); |