1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
|
// Copyright 2008 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
assertTrue({} instanceof Object);
assertTrue([] instanceof Object);
assertFalse({} instanceof Array);
assertTrue([] instanceof Array);
function TestChains() {
var A = {};
var B = {};
var C = {};
B.__proto__ = A;
C.__proto__ = B;
function F() { }
F.prototype = A;
assertTrue(C instanceof F);
assertTrue(B instanceof F);
assertFalse(A instanceof F);
F.prototype = B;
assertTrue(C instanceof F);
assertFalse(B instanceof F);
assertFalse(A instanceof F);
F.prototype = C;
assertFalse(C instanceof F);
assertFalse(B instanceof F);
assertFalse(A instanceof F);
}
TestChains();
function TestExceptions() {
function F() { }
var items = [ 1, new Number(42),
true,
'string', new String('hest'),
{}, [],
F, new F(),
Object, String ];
var exceptions = 0;
var instanceofs = 0;
for (var i = 0; i < items.length; i++) {
for (var j = 0; j < items.length; j++) {
try {
if (items[i] instanceof items[j]) instanceofs++;
} catch (e) {
assertTrue(e instanceof TypeError);
exceptions++;
}
}
}
assertEquals(10, instanceofs);
assertEquals(88, exceptions);
// Make sure to throw an exception if the function prototype
// isn't a proper JavaScript object.
function G() { }
G.prototype = undefined;
assertThrows("({} instanceof G)");
}
TestExceptions();
|
