1// Copyright 2011 the V8 project authors. All rights reserved.
2// Redistribution and use in source and binary forms, with or without
3// modification, are permitted provided that the following conditions are
4// met:
5//
6//     * Redistributions of source code must retain the above copyright
7//       notice, this list of conditions and the following disclaimer.
8//     * Redistributions in binary form must reproduce the above
9//       copyright notice, this list of conditions and the following
10//       disclaimer in the documentation and/or other materials provided
11//       with the distribution.
12//     * Neither the name of Google Inc. nor the names of its
13//       contributors may be used to endorse or promote products derived
14//       from this software without specific prior written permission.
15//
16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28// Flags: --harmony-proxies
29
30
31// Helper.
32
33function TestWithProxies(test, x, y, z) {
34  test(function(h){ return new Proxy({}, h) }, x, y, z)
35  test(function(h) {
36    return new Proxy(function() {}, h)
37  }, x, y, z)
38}
39
40
41// Iterate over a proxy.
42
43Array.prototype.values = function() { return this[Symbol.iterator]() }
44
45function TestForIn(properties, handler) {
46  TestWithProxies(TestForIn2, properties, handler)
47}
48
49function TestForIn2(create, properties, handler) {
50  var p = create(handler)
51  var found = []
52  for (var x in p) found.push(x)
53  assertArrayEquals(properties, found)
54}
55
56TestForIn(["0", "a"], {
57  enumerate() { return ["0", "a"].values() },
58  has(target, property) { return true }
59})
60
61TestForIn(["null", "a"], {
62  enumerate() { return this.enumerate2() },
63  enumerate2() { return ["null", "a"].values() },
64  has(target, property) { return true }
65})
66
67TestForIn(["b", "a", "0", "c"], new Proxy({}, {
68  get: function(pr, pk) {
69    return function() { return ["b", "a", "0", "c"].values() }
70  }
71}))
72
73
74
75// Iterate over an object with a proxy prototype.
76
77function TestForInDerived(properties, handler) {
78  TestWithProxies(TestForInDerived2, properties, handler)
79}
80
81function TestForInDerived2(create, properties, handler) {
82  var p = create(handler)
83  var o = Object.create(p)
84  o.z = 0
85  var found = []
86  for (var x in o) found.push(x)
87  assertArrayEquals(["z"].concat(properties), found)
88
89  var oo = Object.create(o)
90  oo.y = 0
91  var found = []
92  for (var x in oo) found.push(x)
93  assertArrayEquals(["y", "z"].concat(properties), found)
94}
95
96TestForInDerived(["0", "a"], {
97  enumerate: function() { return ["0", "a"].values() },
98  has: function(t, k) { return k == "0" || k == "a" }
99})
100
101TestForInDerived(["null", "a"], {
102  enumerate: function() { return this.enumerate2() },
103  enumerate2: function() { return ["null", "a"].values() },
104  has: function(t, k) { return k == "null" || k == "a" }
105})
106
107
108
109// Throw exception in enumerate trap.
110
111function TestForInThrow(handler) {
112  TestWithProxies(TestForInThrow2, handler)
113}
114
115function TestForInThrow2(create, handler) {
116  var p = create(handler)
117  var o = Object.create(p)
118  assertThrowsEquals(function(){ for (var x in p) {} }, "myexn")
119  assertThrowsEquals(function(){ for (var x in o) {} }, "myexn")
120}
121
122TestForInThrow({
123  enumerate: function() { throw "myexn" }
124})
125
126TestForInThrow({
127  enumerate: function() { return this.enumerate2() },
128  enumerate2: function() { throw "myexn" }
129})
130
131TestForInThrow(new Proxy({}, {
132  get: function(pr, pk) {
133    return function() { throw "myexn" }
134  }
135}));
136
137(function() {
138  var p = new Proxy({}, {enumerate:function() { return ["0"].values(); }});
139  var o = [0];
140  o.__proto__ = p;
141  var keys = [];
142  for (var k in o) { keys.push(k); };
143  assertEquals(["0"], keys);
144})();
145
146(function () {
147  var p = new Proxy({}, {ownKeys: function() { return ["1", Symbol(), "2"] }});
148  assertEquals(["1","2"], Object.getOwnPropertyNames(p));
149})();
150