1/* Copyright JS Foundation and other contributors, http://js.foundation
2 *
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 *     http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16function NoParent () { }
17
18Object.defineProperty (NoParent, Symbol.hasInstance, {
19    value: function (arg) { return false; }
20});
21
22var obj = new NoParent ();
23
24assert ((obj instanceof NoParent) === false);
25
26try {
27  Object.defineProperty (NoParent, Symbol.hasInstance, {
28    value: function (arg) { return true; }
29  });
30  assert (false)
31} catch (ex) {
32  assert (ex instanceof TypeError);
33}
34
35
36function PositiveNumber () { }
37
38Object.defineProperty (PositiveNumber, Symbol.hasInstance, {
39    value: function (arg) { return (arg instanceof Number) && (arg >= 0); }
40})
41
42var num_a = new Number (33);
43var num_b = new Number (-50);
44
45assert ((num_a instanceof PositiveNumber) === true);
46assert ((num_b instanceof PositiveNumber) === false);
47
48
49function ErrorAlways () { }
50
51Object.defineProperty (ErrorAlways, Symbol.hasInstance, {
52    value: function (arg) { throw new URIError ("ErrorAlways"); }
53})
54
55try {
56  (new Object ()) instanceof ErrorAlways;
57  assert (false);
58} catch (ex) {
59  assert (ex instanceof URIError);
60}
61
62
63function NonCallable () { }
64
65Object.defineProperty (NonCallable, Symbol.hasInstance, { value: 11 });
66
67try {
68  (new Object ()) instanceof NonCallable;
69  assert (false);
70} catch (ex) {
71  assert (ex instanceof TypeError);
72}
73
74
75function ErrorGenerator () { }
76
77Object.defineProperty (ErrorGenerator, Symbol.hasInstance, {
78    get: function () { throw new URIError ("ErrorGenerator"); }
79});
80
81try {
82  (new Object ()) instanceof ErrorGenerator;
83  assert (false);
84} catch (ex) {
85  assert (ex instanceof URIError);
86}
87