JSTests/test262/test/built-ins/Array/prototype/filter/15.4.4.20-1-12.js

// 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.filter
es5id: 15.4.4.20-1-12
description: Array.prototype.filter applied to RegExp object
---*/

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

        var obj = new RegExp();
        obj.length = 2;
        obj[1] = true;

        var newArr = Array.prototype.filter.call(obj, callbackfn);

assert.sameValue(newArr[0], true, 'newArr[0]');