object-get-own-property-names.js revision e46be819fca9468a0cd4e74859ce0f778eb8ca60 
1// Copyright 2009 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// Test ES5 section 15.2.3.4 Object.getOwnPropertyNames.
29
30// Check simple cases.
31var obj = { a: 1, b: 2};
32var propertyNames = Object.getOwnPropertyNames(obj);
33propertyNames.sort();
34assertEquals(2, propertyNames.length);
35assertEquals("a", propertyNames[0]);
36assertEquals("b", propertyNames[1]);
37
38var obj = { a: function(){}, b: function(){} };
39var propertyNames = Object.getOwnPropertyNames(obj);
40propertyNames.sort();
41assertEquals(2, propertyNames.length);
42assertEquals("a", propertyNames[0]);
43assertEquals("b", propertyNames[1]);
44
45// Check slow case
46var obj = { a: 1, b: 2, c: 3 };
47delete obj.b;
48var propertyNames = Object.getOwnPropertyNames(obj)
49propertyNames.sort();
50assertEquals(2, propertyNames.length);
51assertEquals("a", propertyNames[0]);
52assertEquals("c", propertyNames[1]);
53
54// Check that non-enumerable properties are being returned.
55var propertyNames = Object.getOwnPropertyNames([1, 2]);
56propertyNames.sort();
57assertEquals(3, propertyNames.length);
58assertEquals("0", propertyNames[0]);
59assertEquals("1", propertyNames[1]);
60assertEquals("length", propertyNames[2]);
61
62// Check that no proto properties are returned.
63var obj = { foo: "foo" };
64obj.__proto__ = { bar: "bar" };
65propertyNames = Object.getOwnPropertyNames(obj);
66propertyNames.sort();
67assertEquals(1, propertyNames.length);
68assertEquals("foo", propertyNames[0]);
69
70// Check that getter properties are returned.
71var obj = {};
72obj.__defineGetter__("getter", function() {});
73propertyNames = Object.getOwnPropertyNames(obj);
74propertyNames.sort();
75assertEquals(1, propertyNames.length);
76assertEquals("getter", propertyNames[0]);
77
78try {
79  Object.getOwnPropertyNames(4);
80  assertTrue(false);
81} catch (e) {
82  assertTrue(/on non-object/.test(e));
83}
84
85try {
86  Object.getOwnPropertyNames("foo");
87  assertTrue(false);
88} catch (e) {
89  assertTrue(/on non-object/.test(e));
90}
91
92try {
93  Object.getOwnPropertyNames(undefined);
94  assertTrue(false);
95} catch (e) {
96  assertTrue(/on non-object/.test(e));
97}
98
99try {
100  Object.getOwnPropertyNames(null);
101  assertTrue(false);
102} catch (e) {
103  assertTrue(/on non-object/.test(e));
104}
105