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 | (function testNonConstructable() { |
| 8 | var proxy = new Proxy({},{}); |
| 9 | assertThrows(function(){ new proxy() }, TypeError); |
| 10 | |
| 11 | var proxy2 = new Proxy(proxy, {}); |
| 12 | assertThrows(function(){ proxy2() }, TypeError); |
| 13 | })(); |
| 14 | |
| 15 | (function testFailingConstructRevoked() { |
| 16 | var pair = Proxy.revocable(Array, {}); |
| 17 | var instance = new pair.proxy(); |
| 18 | pair.revoke(); |
| 19 | assertThrows(function(){ new pair.proxy() }, TypeError); |
| 20 | })(); |
| 21 | |
| 22 | (function testFailingGetTrap() { |
| 23 | var handler = { |
| 24 | get() { |
| 25 | throw TypeError(); |
| 26 | } |
| 27 | } |
| 28 | var proxy = new Proxy({},{}); |
| 29 | var proxy2 = new Proxy({}, proxy); |
| 30 | assertThrows(function(){ new proxy2() }, TypeError); |
| 31 | })(); |
| 32 | |
| 33 | (function testConstructFallback() { |
| 34 | var called = false; |
| 35 | function Target() { |
| 36 | called = true; |
| 37 | this.property1 = 'value1'; |
| 38 | }; |
| 39 | Target.prototype = {}; |
| 40 | var proxy = new Proxy(Target, {}); |
| 41 | |
| 42 | assertFalse(called); |
| 43 | var instance = new proxy(); |
| 44 | assertTrue(called); |
| 45 | assertEquals('value1', instance.property1); |
| 46 | assertSame(Target.prototype, Reflect.getPrototypeOf(instance)); |
| 47 | |
| 48 | var proxy2 = new Proxy(proxy, {}); |
| 49 | called = false; |
| 50 | var instance2 = new proxy2(); |
| 51 | assertTrue(called); |
| 52 | assertEquals('value1', instance2.property1); |
| 53 | assertSame(Target.prototype, Reflect.getPrototypeOf(instance)); |
| 54 | })(); |
| 55 | |
| 56 | (function testConstructTrapDirectReturn() { |
| 57 | function Target(a, b) { |
| 58 | this.sum = a + b; |
| 59 | }; |
| 60 | var handler = { |
| 61 | construct(t, c, args) { |
| 62 | return { sum: 42 }; |
| 63 | } |
| 64 | }; |
| 65 | var proxy = new Proxy(Target, handler); |
| 66 | assertEquals(42, (new proxy(1, 2)).sum); |
| 67 | })(); |
| 68 | |
| 69 | (function testConstructTrap() { |
| 70 | function Target(arg1, arg2) { |
| 71 | this.arg1 = arg1; |
| 72 | this.arg2 = arg2; |
| 73 | } |
| 74 | var seen_target, seen_arguments, seen_new_target; |
| 75 | var handler = { |
| 76 | construct(target, args, new_target) { |
| 77 | seen_target = target; |
| 78 | seen_arguments = args; |
| 79 | seen_new_target = new_target; |
| 80 | return Reflect.construct(target, args, new_target); |
| 81 | } |
| 82 | } |
| 83 | var proxy = new Proxy(Target, handler); |
| 84 | var instance = new proxy('a', 'b'); |
| 85 | assertEquals(Target, seen_target); |
| 86 | assertEquals(['a','b'], seen_arguments); |
| 87 | assertEquals(proxy, seen_new_target); |
| 88 | assertEquals('a', instance.arg1); |
| 89 | assertEquals('b', instance.arg2); |
| 90 | |
| 91 | var instance2 = Reflect.construct(proxy, ['a1', 'b1'], Array); |
| 92 | assertEquals(Target, seen_target); |
| 93 | assertEquals(['a1', 'b1'], seen_arguments); |
| 94 | assertEquals(Array, seen_new_target); |
| 95 | assertEquals('a1', instance2.arg1); |
| 96 | assertEquals('b1', instance2.arg2); |
| 97 | })(); |
| 98 | |
| 99 | (function testConstructCrossRealm() { |
| 100 | var realm1 = Realm.create(); |
| 101 | var handler = { |
| 102 | construct(target, args, new_target) { |
| 103 | return args; |
| 104 | } |
| 105 | }; |
| 106 | var OtherProxy = Realm.eval(realm1, "Proxy"); |
| 107 | var otherArrayPrototype = Realm.eval(realm1, 'Array.prototype'); |
| 108 | |
| 109 | // Proxy and handler are from this realm. |
| 110 | var proxy = new Proxy(Array, handler); |
| 111 | var result = new proxy(); |
| 112 | assertSame(Array.prototype, Reflect.getPrototypeOf(result)); |
| 113 | |
| 114 | // Proxy is from this realm, handler is from realm1. |
| 115 | var otherProxy = new OtherProxy(Array, handler); |
| 116 | var otherResult = new otherProxy(); |
| 117 | assertSame(Array.prototype, Reflect.getPrototypeOf(otherResult)); |
| 118 | |
| 119 | // Proxy and handler are from realm1. |
| 120 | var otherProxy2 = Realm.eval(realm1, 'new Proxy('+ |
| 121 | 'Array, { construct(target, args, new_target) { return args }} )'); |
| 122 | var otherResult2 = new otherProxy2(); |
| 123 | assertSame(Array.prototype, Reflect.getPrototypeOf(otherResult2)); |
| 124 | })(); |
| 125 | |
| 126 | (function testReflectConstructCrossReal() { |
| 127 | var realm1 = Realm.create(); |
| 128 | var realm2 = Realm.create(); |
| 129 | var realm3 = Realm.create(); |
| 130 | var realm4 = Realm.create(); |
| 131 | |
| 132 | var argsRealm1 = Realm.eval(realm1, '[]'); |
| 133 | var ProxyRealm2 = Realm.eval(realm2, 'Proxy'); |
| 134 | var constructorRealm3 = Realm.eval(realm3, '(function(){})'); |
| 135 | var handlerRealm4 = Realm.eval(realm4, |
| 136 | '({ construct(target, args, new_target) {return args} })'); |
| 137 | |
| 138 | var proxy = new ProxyRealm2(constructorRealm3, handlerRealm4); |
| 139 | |
| 140 | // Check that the arguments array returned by handlerRealm4 is created in the |
| 141 | // realm of the Reflect.construct function. |
| 142 | var result = Reflect.construct(proxy, argsRealm1); |
| 143 | assertSame(Array.prototype, Reflect.getPrototypeOf(result)); |
| 144 | |
| 145 | var ReflectConstructRealm1 = Realm.eval(realm1, 'Reflect.construct'); |
| 146 | var result2 = ReflectConstructRealm1(proxy, argsRealm1); |
| 147 | assertSame(Realm.eval(realm1, 'Array.prototype'), |
| 148 | Reflect.getPrototypeOf(result2)); |
| 149 | |
| 150 | var result3 = ReflectConstructRealm1(proxy, []); |
| 151 | assertSame(Realm.eval(realm1, 'Array.prototype'), |
| 152 | Reflect.getPrototypeOf(result3)); |
| 153 | |
| 154 | var ReflectConstructRealm2 = Realm.eval(realm2, 'Reflect.construct'); |
| 155 | var result4 = ReflectConstructRealm2(proxy, argsRealm1); |
| 156 | assertSame(Realm.eval(realm2, 'Array.prototype'), |
| 157 | Reflect.getPrototypeOf(result4)); |
| 158 | })(); |