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| 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 var target = { | |
| 8 "target_one": 1 | |
| 9 }; | |
| 10 target.__proto__ = { | |
| 11 "target_proto_two": 2 | |
| 12 }; | |
| 13 var handler = { | |
| 14 ownKeys: function(target) { | |
| 15 return ["foo", "bar"]; | |
| 16 } | |
| 17 } | |
| 18 | |
| 19 var proxy = new Proxy(target, handler); | |
| 20 | |
| 21 // Simple case. | |
| 22 assertEquals(["foo", "bar"], Reflect.ownKeys(proxy)); | |
| 23 | |
| 24 // Test interesting steps of the algorithm: | |
| 25 | |
| 26 // Step 6: Fall through to target.[[OwnPropertyKeys]] if the trap is undefined. | |
| 27 handler.ownKeys = undefined; | |
| 28 assertEquals(["target_one"], Reflect.ownKeys(proxy)); | |
| 29 | |
| 30 // Step 7: Throwing traps don't crash. | |
| 31 handler.ownKeys = function(target) { throw 1; }; | |
| 32 assertThrows("Reflect.ownKeys(proxy)"); | |
| 33 | |
| 34 // Step 8: CreateListFromArrayLike error cases: | |
| 35 // Returning a non-Object throws. | |
| 36 var keys = 1; | |
| 37 handler.ownKeys = function(target) { return keys; }; | |
| 38 assertThrows("Reflect.ownKeys(proxy)", TypeError); | |
| 39 keys = "string"; | |
| 40 assertThrows("Reflect.ownKeys(proxy)", TypeError); | |
| 41 keys = Symbol("foo"); | |
| 42 assertThrows("Reflect.ownKeys(proxy)", TypeError); | |
| 43 keys = null; | |
| 44 assertThrows("Reflect.ownKeys(proxy)", TypeError); | |
| 45 | |
| 46 // "length" property is honored. | |
| 47 keys = { 0: "a", 1: "b", 2: "c" }; | |
| 48 keys.length = 0; | |
| 49 assertEquals([], Reflect.ownKeys(proxy)); | |
| 50 keys.length = 1; | |
| 51 assertEquals(["a"], Reflect.ownKeys(proxy)); | |
| 52 keys.length = 3; | |
| 53 assertEquals(["a", "b", "c"], Reflect.ownKeys(proxy)); | |
| 54 // The spec wants to allow lengths up to 2^53, but we can't allocate arrays | |
| 55 // of that size, so we throw even for smaller values. | |
| 56 keys.length = Math.pow(2, 33); | |
| 57 assertThrows("Reflect.ownKeys(proxy)", RangeError); | |
| 58 | |
| 59 // Check that we allow duplicated keys. | |
| 60 keys = ['a', 'a', 'a'] | |
| 61 assertEquals(keys, Reflect.ownKeys(proxy)); | |
| 62 | |
| 63 // Non-Name results throw. | |
| 64 keys = [1]; | |
| 65 assertThrows("Reflect.ownKeys(proxy)", TypeError); | |
| 66 keys = [{}]; | |
| 67 assertThrows("Reflect.ownKeys(proxy)", TypeError); | |
| 68 keys = [{toString: function() { return "foo"; }}]; | |
| 69 assertThrows("Reflect.ownKeys(proxy)", TypeError); | |
| 70 keys = [null]; | |
| 71 assertThrows("Reflect.ownKeys(proxy)", TypeError); | |
| 72 | |
| 73 // Step 17a: The trap result must include all non-configurable keys. | |
| 74 Object.defineProperty(target, "nonconf", {value: 1, configurable: false}); | |
| 75 keys = ["foo"]; | |
| 76 assertThrows("Reflect.ownKeys(proxy)", TypeError); | |
| 77 keys = ["nonconf"]; | |
| 78 assertEquals(keys, Reflect.ownKeys(proxy)); | |
| 79 | |
| 80 // Check that we allow duplicated keys. | |
| 81 keys = ['nonconf', 'nonconf', 'nonconf'] | |
| 82 assertEquals(keys, Reflect.ownKeys(proxy)); | |
| 83 | |
| 84 // Step 19a: The trap result must all keys of a non-extensible target. | |
| 85 Object.preventExtensions(target); | |
| 86 assertThrows("Reflect.ownKeys(proxy)", TypeError); | |
| 87 keys = ["nonconf", "target_one"]; | |
| 88 assertEquals(keys, Reflect.ownKeys(proxy)); | |
| 89 | |
| 90 // Step 20: The trap result must not add keys to a non-extensible target. | |
| 91 keys = ["nonconf", "target_one", "fantasy"]; | |
| 92 assertThrows("Reflect.ownKeys(proxy)", TypeError); | |
| 93 | |
| 94 // Check that we allow duplicated keys. | |
| 95 keys = ['nonconf', 'target_one', 'nonconf', 'nonconf', 'target_one',] | |
| 96 assertEquals(keys, Reflect.ownKeys(proxy)); | |
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