| // 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: > |
| Return false if ToBoolean(trap result) is false, without checking |
| target.[[IsExtensible]] |
| 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. |
| features: [Proxy, Reflect, Reflect.setPrototypeOf] |
| ---*/ |
| |
| var called = 0; |
| |
| var target = new Proxy({}, { |
| isExtensible: function() { |
| called += 1; |
| } |
| }); |
| |
| var p = new Proxy(target, { |
| setPrototypeOf: function(t, v) { |
| return v.attr; |
| } |
| }); |
| |
| var result; |
| |
| result = Reflect.setPrototypeOf(p, { |
| attr: false |
| }); |
| assert.sameValue(result, false, "false"); |
| assert.sameValue(called, 0, "false - isExtensible is not called"); |
| |
| result = Reflect.setPrototypeOf(p, { |
| attr: "" |
| }); |
| assert.sameValue(result, false, "the empty string"); |
| assert.sameValue(called, 0, "the empty string - isExtensible is not called"); |
| |
| result = Reflect.setPrototypeOf(p, { |
| attr: 0 |
| }); |
| assert.sameValue(result, false, "0"); |
| assert.sameValue(called, 0, "0 - isExtensible is not called"); |
| |
| result = Reflect.setPrototypeOf(p, { |
| attr: -0 |
| }); |
| assert.sameValue(result, false, "-0"); |
| assert.sameValue(called, 0, "-0 - isExtensible is not called"); |
| |
| result = Reflect.setPrototypeOf(p, { |
| attr: null |
| }); |
| assert.sameValue(result, false, "null"); |
| assert.sameValue(called, 0, "null - isExtensible is not called"); |
| |
| result = Reflect.setPrototypeOf(p, { |
| attr: undefined |
| }); |
| assert.sameValue(result, false, "undefined"); |
| assert.sameValue(called, 0, "undefined - isExtensible is not called"); |
| |
| result = Reflect.setPrototypeOf(p, { |
| attr: NaN |
| }); |
| assert.sameValue(result, false, "NaN"); |
| assert.sameValue(called, 0, "NaN - isExtensible is not called"); |