test/built-ins/Array/prototype/reduce/15.4.4.21-1-12.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.

/*---
esid: sec-array.prototype.reduce
es5id: 15.4.4.21-1-12
description: Array.prototype.reduce applied to RegExp object
---*/

        function callbackfn(prevVal, curVal, idx, obj) {
            return obj instanceof RegExp;
        }

        var obj = new RegExp();
        obj.length = 1;
        obj[0] = 1;

assert(Array.prototype.reduce.call(obj, callbackfn, 1), 'Array.prototype.reduce.call(obj, callbackfn, 1) !== true');