1// Copyright 2008 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
28function check_enumeration_order(obj)  {
29  var value = 0;
30  for (var name in obj) assertTrue(value < obj[name]);
31  value = obj[name];
32}
33
34function make_object(size)  {
35  var a = new Object();
36
37  for (var i = 0; i < size; i++) a["a_" + i] = i + 1;
38  check_enumeration_order(a);
39
40  for (var i = 0; i < size; i +=3) delete a["a_" + i];
41  check_enumeration_order(a);
42}
43
44// Validate the enumeration order for object up to 100 named properties.
45for (var j = 1; j< 100; j++) make_object(j);
46
47
48function make_literal_object(size)  {
49  var code = "{ ";
50  for (var i = 0; i < size-1; i++) code += " a_" + i + " : " + (i + 1) + ", ";
51  code += "a_" + (size - 1) + " : " + size;
52  code += " }";
53  eval("var a = " + code);
54  check_enumeration_order(a);
55}
56
57// Validate the enumeration order for object literals up to 100 named
58// properties.
59for (var j = 1; j< 100; j++) make_literal_object(j);
60
61// We enumerate indexed properties in numerical order followed by
62// named properties in insertion order, followed by indexed properties
63// of the prototype object in numerical order, followed by named
64// properties of the prototype object in insertion order, and so on.
65//
66// This enumeration order is not required by the specification, so
67// this just documents our choice.
68var proto2 = {};
69proto2[140000] = 0;
70proto2.a = 0;
71proto2[2] = 0;
72proto2[3] = 0;  // also on the 'proto1' object
73proto2.b = 0;
74proto2[4294967295] = 0;
75proto2.c = 0;
76proto2[4294967296] = 0;
77
78var proto1 = {};
79proto1[5] = 0;
80proto1.d = 0;
81proto1[3] = 0;
82proto1.e = 0;
83proto1.f = 0;  // also on the 'o' object
84
85var o = {};
86o[-23] = 0;
87o[300000000000] = 0;
88o[23] = 0;
89o.f = 0;
90o.g = 0;
91o[-4] = 0;
92o[42] = 0;
93
94o.__proto__ = proto1;
95proto1.__proto__ = proto2;
96
97var expected = ['23', '42',  // indexed from 'o'
98                '-23', '300000000000', 'f', 'g', '-4',  // named from 'o'
99                '3', '5',  // indexed from 'proto1'
100                'd', 'e',  // named from 'proto1'
101                '2', '140000', '4294967295',  // indexed from 'proto2'
102                'a', 'b', 'c', '4294967296'];  // named from 'proto2'
103var actual = [];
104for (var p in o) actual.push(p);
105assertArrayEquals(expected, actual);
106