JSTests/test262/test/built-ins/Array/prototype/map/15.4.4.19-8-b-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.map
es5id: 15.4.4.19-8-b-12
description: >
    Array.prototype.map - deleting own property with prototype
    property causes prototype index property to be visited on an
    Array-like object
---*/

        function callbackfn(val, idx, obj) {
            if (idx === 1 && val === 3) {
                return false;
            } else {
                return true;
            }
        }
        var obj = { 0: 0, 1: 1, 2: 2, length: 10 };

        Object.defineProperty(obj, "0", {
            get: function () {
                delete obj[1];
                return 0;
            },
            configurable: true
        });

            Object.prototype[1] = 3;
            var testResult = Array.prototype.map.call(obj, callbackfn);

assert.sameValue(testResult[1], false, 'testResult[1]');