test262/test/suite/ch15/15.2/15.2.3/15.2.3.7/15.2.3.7-6-a-113.js

/// 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.
/**
 * @path ch15/15.2/15.2.3/15.2.3.7/15.2.3.7-6-a-113.js
 * @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)
 */


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);