JSTests/test262/test/built-ins/Array/prototype/some/15.4.4.17-7-c-i-5.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.some
es5id: 15.4.4.17-7-c-i-5
description: >
    Array.prototype.some - element to be retrieved is own data
    property that overrides an inherited accessor property on an
    Array-like object
---*/

        var kValue = 1000;

        function callbackfn(val, idx, obj) {
            if (idx === 0) {
                return val === kValue;
            }
            return false;
        }

        var proto = {};

        Object.defineProperty(proto, "0", {
            get: function () {
                return 5;
            },
            configurable: true
        });

        var Con = function () { };
        Con.prototype = proto;

        var child = new Con();
        child.length = 2;
        Object.defineProperty(child, "0", {
            value: kValue,
            configurable: true
        });

assert(Array.prototype.some.call(child, callbackfn), 'Array.prototype.some.call(child, callbackfn) !== true');