test/language/expressions/array/11.1.4_5-6-1.js


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

// Copyright (c) 2012 Ecma International.  All rights reserved.
// Ecma International makes this code available under the terms and conditions set
// forth on http://hg.ecmascript.org/tests/test262/raw-file/tip/LICENSE (the
// "Use Terms").   Any redistribution of this code must retain the above
// copyright and this notice and otherwise comply with the Use Terms.

/*---
info: >
    Refer 11.1.4; 
    The production
    ElementList : ElementList , Elisionopt AssignmentExpression
    6.Call the [[DefineOwnProperty]] internal method of array with arguments ToString(ToUint32((pad+len)) and the Property Descriptor { [[Value]]: initValue
    , [[Writable]]: true, [[Enumerable]]: true, [[Configurable]]: true}, and false.
es5id: 11.1.4_5-6-1
description: >
    Initialize array using ElementList (ElementList , Elisionopt
    AssignmentExpression) when index property (read-only) exists in
    Array.prototype (step 6)
includes: [runTestCase.js]
---*/

function testcase() {
        try {
            Object.defineProperty(Array.prototype, "1", {
                value: 100,
                writable: false,
                configurable: true
            });
            var arr = [101, 12];

            return arr.hasOwnProperty("1") && arr[1] === 12;
        } finally {
            delete Array.prototype[1];
        }
    }
runTestCase(testcase);