test/suite/ch11/11.1/11.1.4/11.1.4_4-5-1.js


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/// 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.
/**
 * Refer 11.1.4; 
 * The production
 * ElementList : Elisionopt AssignmentExpression
 * 5.Call the [[DefineOwnProperty]] internal method of array with arguments ToString(firstIndex), the Property Descriptor { [[Value]]: initValue, [[Writable]]: true
 *     , [[Enumerable]]: true, [[Configurable]]: true}, and false.
 *
 * @path ch11/11.1/11.1.4/11.1.4_4-5-1.js
 * @description Initialize array using ElementList (Elisionopt AssignmentExpression) when index property (read-only) exists in Array.prototype (step 5)
 */


function testcase() {
        try {
            Object.defineProperty(Array.prototype, "0", {
                value: 100,
                writable: false,
                configurable: true
            });
            var arr = [101];

            return arr.hasOwnProperty("0") && arr[0] === 101;
        } finally {
            delete Array.prototype[0];
        }
    }
runTestCase(testcase);