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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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