JSTests/test262/test/built-ins/Array/prototype/filter/15.4.4.20-9-b-2.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: 15.4.4.20-9-b-2
description: >
    Array.prototype.filter - added properties in step 2 are visible
    here
---*/

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

        var obj = {};

        Object.defineProperty(obj, "length", {
            get: function () {
                obj[2] = "length";
                return 3;
            },
            configurable: true
        });

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

assert.sameValue(newArr.length, 1, 'newArr.length');
assert.sameValue(newArr[0], "length", 'newArr[0]');