test/built-ins/Object/defineProperties/15.2.3.7-6-a-113.js


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// Copyright (c) 2012 Ecma International.  All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
es5id: 15.2.3.7-6-a-113
description: >
    Object.defineProperties - 'O' is an Array, test the length
    property of 'O' is own data property that overrides an inherited
    data property (15.4.5.1 step 1)
includes: [runTestCase.js]
---*/

function testcase() {

        var arrProtoLen;
        var arr = [0, 1, 2];
        try {
            arrProtoLen = Array.prototype.length;
            Array.prototype.length = 0;

            Object.defineProperty(arr, "2", {
                configurable: false
            });

            Object.defineProperties(arr, {
                length: { value: 1 }
            });
            return false;
        } catch (e) {
            var desc = Object.getOwnPropertyDescriptor(arr, "length");

            return e instanceof TypeError && desc.value === 3 &&
                desc.writable && !desc.enumerable && !desc.configurable;
        } finally {
            Array.prototype.length = arrProtoLen;
        }
    }
runTestCase(testcase);