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
|
/// Copyright (c) 2009 Microsoft Corporation
///
/// 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 Microsoft 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.
/**
* @path ch15/15.4/15.4.4/15.4.4.4/15.4.4.4-5-b-iii-3-b-1.js
* @description Array.prototype.concat will concat an Array when index property (read-only) exists in Array.prototype (Step 5.b.iii.3.b)
*/
function testcase() {
try {
Object.defineProperty(Array.prototype, "0", {
value: 100,
writable: false,
configurable: true
});
var oldArr = [101];
var newArr = Array.prototype.concat.call(oldArr);
var verifyValue = false;
verifyValue = newArr[0] === 101;
var verifyEnumerable = false;
for (var p in newArr) {
if (p === "0" && newArr.hasOwnProperty("0")) {
verifyEnumerable = true;
}
}
var verifyWritable = false;
newArr[0] = 12;
verifyWritable = newArr[0] === 12;
var verifyConfigurable = false;
delete newArr[0];
verifyConfigurable = newArr.hasOwnProperty("0");
return verifyValue && !verifyConfigurable && verifyEnumerable && verifyWritable;
} finally {
delete Array.prototype[0];
}
}
runTestCase(testcase);
|
