test/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-27.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: 15.4.4.21-8-b-iii-1-27
description: >
    Array.prototype.reduce - This object is the Arguments object which
    implements its own property get method (number of arguments is
    greater than number of parameters)
---*/

        var testResult = false;
        function callbackfn(prevVal, curVal, idx, obj) {
            if (idx === 3) {
                testResult = (prevVal === 2);
            }
        }

        var func = function (a, b, c) {
            delete arguments[0];
            delete arguments[1];
            Array.prototype.reduce.call(arguments, callbackfn);
        };

        func(0, 1, 2, 3);

assert(testResult, 'testResult !== true');