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
28assertTrue({} instanceof Object);
29assertTrue([] instanceof Object);
30
31assertFalse({} instanceof Array);
32assertTrue([] instanceof Array);
33
34function TestChains() {
35  var A = {};
36  var B = {};
37  var C = {};
38  B.__proto__ = A;
39  C.__proto__ = B;
40
41  function F() { }
42  F.prototype = A;
43  assertTrue(C instanceof F);
44  assertTrue(B instanceof F);
45  assertFalse(A instanceof F);
46
47  F.prototype = B;
48  assertTrue(C instanceof F);
49  assertFalse(B instanceof F);
50  assertFalse(A instanceof F);
51
52  F.prototype = C;
53  assertFalse(C instanceof F);
54  assertFalse(B instanceof F);
55  assertFalse(A instanceof F);
56}
57
58TestChains();
59
60
61function TestExceptions() {
62  function F() { }
63  var items = [ 1, new Number(42),
64                true,
65                'string', new String('hest'),
66                {}, [],
67                F, new F(),
68                Object, String ];
69
70  var exceptions = 0;
71  var instanceofs = 0;
72
73  for (var i = 0; i < items.length; i++) {
74    for (var j = 0; j < items.length; j++) {
75      try {
76        if (items[i] instanceof items[j]) instanceofs++;
77      } catch (e) {
78        assertTrue(e instanceof TypeError);
79        exceptions++;
80      }
81    }
82  }
83  assertEquals(10, instanceofs);
84  assertEquals(88, exceptions);
85
86  // Make sure to throw an exception if the function prototype
87  // isn't a proper JavaScript object.
88  function G() { }
89  G.prototype = undefined;
90  assertThrows("({} instanceof G)");
91}
92
93TestExceptions();
94