JSTests/test262/test/built-ins/Array/prototype/filter/15.4.4.20-3-18.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: 15.4.4.20-3-18
description: >
    Array.prototype.filter - value of 'length' is a string that can't
    convert to a number
---*/

        var accessed = false;
        function callbackfn(val, idx, obj) {
            accessed = true;
            return true;
        }

        var obj = { 0: 9, length: "asdf!_" };

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

assert.sameValue(accessed, false, 'accessed');
assert.sameValue(newArr.length, 0, 'newArr.length');