JSTests/test262/test/built-ins/Array/prototype/map/15.4.4.19-9-9.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.map
es5id: 15.4.4.19-9-9
description: >
    Array.prototype.map - empty array to be returned if 'length' is 0
    (subclassed Array, length overridden to '0' (type conversion))
---*/

        var accessed = false;

        function callbackfn(val, idx, obj) {
            accessed = true;
            return val > 10;
        }

        var Foo = function () { };
        Foo.prototype = [1, 2, 3];
        var obj = new Foo();
        obj.length = '0';

        var testResult = Array.prototype.map.call(obj, callbackfn);

assert.sameValue(testResult.length, 0, 'testResult.length');