Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1 | // Copyright 2015 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 5 | |
| 6 | (function () { |
| 7 | // No trap. |
| 8 | |
| 9 | var target = {}; |
| 10 | var handler = {}; |
| 11 | var proxy = new Proxy(target, handler); |
| 12 | |
| 13 | assertTrue(Reflect.isExtensible(target)); |
| 14 | assertTrue(Reflect.isExtensible(proxy)); |
| 15 | assertTrue(Reflect.preventExtensions(proxy)); |
| 16 | assertFalse(Reflect.isExtensible(target)); |
| 17 | assertFalse(Reflect.isExtensible(proxy)); |
| 18 | })(); |
| 19 | |
| 20 | |
| 21 | (function () { |
| 22 | // "Undefined" trap. |
| 23 | |
| 24 | var target = {}; |
| 25 | var handler = { isExtensible: null }; |
| 26 | var proxy = new Proxy(target, handler); |
| 27 | |
| 28 | assertTrue(Reflect.isExtensible(target)); |
| 29 | assertTrue(Reflect.isExtensible(proxy)); |
| 30 | assertTrue(Reflect.preventExtensions(proxy)); |
| 31 | assertFalse(Reflect.isExtensible(target)); |
| 32 | assertFalse(Reflect.isExtensible(proxy)); |
| 33 | })(); |
| 34 | |
| 35 | |
| 36 | (function () { |
| 37 | // Invalid trap. |
| 38 | |
| 39 | var target = {}; |
| 40 | var handler = { isExtensible: true }; |
| 41 | var proxy = new Proxy(target, handler); |
| 42 | |
| 43 | assertThrows(() => {Reflect.isExtensible(proxy)}, TypeError); |
| 44 | })(); |
| 45 | |
| 46 | |
| 47 | (function () { |
| 48 | var target = {}; |
| 49 | var handler = { isExtensible() {return "bla"} }; |
| 50 | var proxy = new Proxy(target, handler); |
| 51 | |
| 52 | // Trap returns trueish and target is extensible. |
| 53 | assertTrue(Reflect.isExtensible(proxy)); |
| 54 | |
| 55 | // Trap returns trueish but target is not extensible. |
| 56 | Reflect.preventExtensions(target); |
| 57 | assertThrows(() => {Reflect.isExtensible(proxy)}, TypeError); |
| 58 | })(); |
| 59 | |
| 60 | |
| 61 | (function () { |
| 62 | var target = {}; |
| 63 | var handler = { isExtensible() {return 0} }; |
| 64 | var proxy = new Proxy(target, handler); |
| 65 | |
| 66 | // Trap returns falsish but target is extensible. |
| 67 | assertThrows(() => {Reflect.isExtensible(proxy)}, TypeError); |
| 68 | |
| 69 | // Trap returns falsish and target is not extensible. |
| 70 | Reflect.preventExtensions(target); |
| 71 | assertFalse(Reflect.isExtensible(proxy)); |
| 72 | })(); |