test/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-21.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.

/*---
es5id: 15.4.4.21-9-c-i-21
description: >
    Array.prototype.reduce - element to be retrieved is inherited
    accessor property without a get function on an Array-like object
includes: [runTestCase.js]
---*/

function testcase() {

        var testResult = false;
        var initialValue = 0;
        function callbackfn(prevVal, curVal, idx, obj) {
            if (idx === 1) {
                testResult = (curVal === undefined);
            }
        }

        var proto = { 0: 0, 2: 2 };

        Object.defineProperty(proto, "1", {
            set: function () { },
            configurable: true
        });

        var Con = function () { };
        Con.prototype = proto;

        var child = new Con();
        child.length = 3;

        Array.prototype.reduce.call(child, callbackfn, initialValue);
        return testResult;
    }
runTestCase(testcase);