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 | |
| 5 | // Flags: --harmony-proxies --harmony-reflect |
| 6 | |
| 7 | |
| 8 | (function () { |
| 9 | // No trap. |
| 10 | |
| 11 | var target = {}; |
| 12 | var handler = {}; |
| 13 | var proxy = new Proxy(target, handler); |
| 14 | |
| 15 | assertTrue(Reflect.isExtensible(target)); |
| 16 | assertTrue(Reflect.isExtensible(proxy)); |
| 17 | assertTrue(Reflect.preventExtensions(proxy)); |
| 18 | assertFalse(Reflect.isExtensible(target)); |
| 19 | assertFalse(Reflect.isExtensible(proxy)); |
| 20 | })(); |
| 21 | |
| 22 | |
| 23 | (function () { |
| 24 | // "Undefined" trap. |
| 25 | |
| 26 | var target = {}; |
| 27 | var handler = { isExtensible: null }; |
| 28 | var proxy = new Proxy(target, handler); |
| 29 | |
| 30 | assertTrue(Reflect.isExtensible(target)); |
| 31 | assertTrue(Reflect.isExtensible(proxy)); |
| 32 | assertTrue(Reflect.preventExtensions(proxy)); |
| 33 | assertFalse(Reflect.isExtensible(target)); |
| 34 | assertFalse(Reflect.isExtensible(proxy)); |
| 35 | })(); |
| 36 | |
| 37 | |
| 38 | (function () { |
| 39 | // Invalid trap. |
| 40 | |
| 41 | var target = {}; |
| 42 | var handler = { isExtensible: true }; |
| 43 | var proxy = new Proxy(target, handler); |
| 44 | |
| 45 | assertThrows(() => {Reflect.isExtensible(proxy)}, TypeError); |
| 46 | })(); |
| 47 | |
| 48 | |
| 49 | (function () { |
| 50 | var target = {}; |
| 51 | var handler = { isExtensible() {return "bla"} }; |
| 52 | var proxy = new Proxy(target, handler); |
| 53 | |
| 54 | // Trap returns trueish and target is extensible. |
| 55 | assertTrue(Reflect.isExtensible(proxy)); |
| 56 | |
| 57 | // Trap returns trueish but target is not extensible. |
| 58 | Reflect.preventExtensions(target); |
| 59 | assertThrows(() => {Reflect.isExtensible(proxy)}, TypeError); |
| 60 | })(); |
| 61 | |
| 62 | |
| 63 | (function () { |
| 64 | var target = {}; |
| 65 | var handler = { isExtensible() {return 0} }; |
| 66 | var proxy = new Proxy(target, handler); |
| 67 | |
| 68 | // Trap returns falsish but target is extensible. |
| 69 | assertThrows(() => {Reflect.isExtensible(proxy)}, TypeError); |
| 70 | |
| 71 | // Trap returns falsish and target is not extensible. |
| 72 | Reflect.preventExtensions(target); |
| 73 | assertFalse(Reflect.isExtensible(proxy)); |
| 74 | })(); |