| OLD | NEW |
| (Empty) |
| 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 --allow-natives-syntax | |
| 6 | |
| 7 (function testBasicFunctionality() { | |
| 8 var target = { | |
| 9 target_one: 1, | |
| 10 property: "value" | |
| 11 }; | |
| 12 | |
| 13 var handler = {handler:1}; | |
| 14 | |
| 15 var proxy = new Proxy(target, handler); | |
| 16 assertEquals("value", proxy.property); | |
| 17 assertEquals(undefined, proxy.nothing); | |
| 18 assertEquals(undefined, proxy.handler); | |
| 19 | |
| 20 handler.get = function() { return "value 2" }; | |
| 21 assertEquals("value 2", proxy.property); | |
| 22 assertEquals("value 2", proxy.nothing); | |
| 23 assertEquals("value 2", proxy.handler); | |
| 24 | |
| 25 var handler2 = new Proxy({get: function() { return "value 3" }},{}); | |
| 26 var proxy2 = new Proxy(target, handler2); | |
| 27 assertEquals("value 3", proxy2.property); | |
| 28 assertEquals("value 3", proxy2.nothing); | |
| 29 assertEquals("value 3", proxy2.handler); | |
| 30 })(); | |
| 31 | |
| 32 (function testThrowOnGettingTrap() { | |
| 33 var handler = new Proxy({}, {get: function(){ throw Error() }}); | |
| 34 var proxy = new Proxy({}, handler); | |
| 35 assertThrows("proxy.property", Error); | |
| 36 })(); | |
| 37 | |
| 38 (function testFallback() { | |
| 39 var target = {property:"value"}; | |
| 40 var proxy = new Proxy(target, {}); | |
| 41 assertEquals("value", proxy.property); | |
| 42 assertEquals(undefined, proxy.property2); | |
| 43 })(); | |
| 44 | |
| 45 (function testFallbackUndefinedTrap() { | |
| 46 var handler = new Proxy({}, {get: function(){ return undefined }}); | |
| 47 var target = {property:"value"}; | |
| 48 var proxy = new Proxy(target, handler); | |
| 49 assertEquals("value", proxy.property); | |
| 50 assertEquals(undefined, proxy.property2); | |
| 51 })(); | |
| 52 | |
| 53 (function testFailingInvariant() { | |
| 54 var target = {}; | |
| 55 var handler = { get: function(r, p){ if (p != "key4") return "value" }} | |
| 56 var proxy = new Proxy(target, handler); | |
| 57 assertEquals("value", proxy.property); | |
| 58 assertEquals("value", proxy.key); | |
| 59 assertEquals("value", proxy.key2); | |
| 60 assertEquals("value", proxy.key3); | |
| 61 | |
| 62 // Define a non-configurable, non-writeable property on the target for | |
| 63 // which the handler will return a different value. | |
| 64 Object.defineProperty(target, "key", { | |
| 65 configurable: false, | |
| 66 writable: false, | |
| 67 value: "different value" | |
| 68 }); | |
| 69 assertEquals("value", proxy.property); | |
| 70 assertThrows(function(){ proxy.key }, TypeError); | |
| 71 assertEquals("value", proxy.key2); | |
| 72 assertEquals("value", proxy.key3); | |
| 73 | |
| 74 // Define a non-configurable getter on the target for which the handler | |
| 75 // will return a value, according to the spec we do not throw. | |
| 76 Object.defineProperty(target, "key2", { | |
| 77 configurable: false, | |
| 78 get: function() { return "different value" } | |
| 79 }); | |
| 80 assertEquals("value", proxy.property); | |
| 81 assertThrows(function(){ proxy.key }, TypeError); | |
| 82 assertEquals("value", proxy.key2); | |
| 83 assertEquals("value", proxy.key3); | |
| 84 | |
| 85 // Define a non-configurable setter without a corresponding getter on the | |
| 86 // target for which the handler will return a value. | |
| 87 Object.defineProperty(target, "key3", { | |
| 88 configurable: false, | |
| 89 set: function() { } | |
| 90 }); | |
| 91 assertEquals("value", proxy.property); | |
| 92 assertThrows(function(){ proxy.key }, TypeError); | |
| 93 assertEquals("value", proxy.key2); | |
| 94 assertThrows(function(){ proxy.key3 }, TypeError); | |
| 95 | |
| 96 // Define a non-configurable setter without a corresponding getter on the | |
| 97 // target for which the handler will return undefined. | |
| 98 Object.defineProperty(target, "key4", { | |
| 99 configurable: false, | |
| 100 set: function() { } | |
| 101 }); | |
| 102 assertSame(undefined, proxy.key4); | |
| 103 })(); | |
| 104 | |
| 105 (function testGetInternalIterators() { | |
| 106 var log = []; | |
| 107 var array = [1,2,3,4,5] | |
| 108 var origIt = array[Symbol.iterator](); | |
| 109 var it = new Proxy(origIt, { | |
| 110 get(t, name) { | |
| 111 log.push(`[[Get]](iterator, ${String(name)})`); | |
| 112 return Reflect.get(t, name); | |
| 113 }, | |
| 114 set(t, name, val) { | |
| 115 log.push(`[[Set]](iterator, ${String(name)}, ${String(val)})`); | |
| 116 return Reflect.set(t, name, val); | |
| 117 } | |
| 118 }); | |
| 119 | |
| 120 assertThrows(function() { | |
| 121 for (var v of it) log.push(v); | |
| 122 }, TypeError); | |
| 123 assertEquals([ | |
| 124 "[[Get]](iterator, Symbol(Symbol.iterator))", | |
| 125 "[[Get]](iterator, next)" | |
| 126 ], log); | |
| 127 })(); | |
| OLD | NEW |