test/built-ins/Array/prototype/some/15.4.4.17-7-c-i-20.js


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// Copyright (c) 2012 Ecma International.  All rights reserved.
// Ecma International makes this code available under the terms and conditions set
// forth on http://hg.ecmascript.org/tests/test262/raw-file/tip/LICENSE (the
// "Use Terms").   Any redistribution of this code must retain the above
// copyright and this notice and otherwise comply with the Use Terms.

/*---
es5id: 15.4.4.17-7-c-i-20
description: >
    Array.prototype.some - element to be retrieved is own accessor
    property without a get function that overrides an inherited
    accessor property on an Array
includes: [runTestCase.js]
---*/

function testcase() {

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

        var arr = [];

        Object.defineProperty(arr, "0", {
            set: function () { },
            configurable: true
        });

        try {
            Array.prototype[0] = 100;
            return arr.some(callbackfn);
        } finally {
            delete Array.prototype[0];
        }
    }
runTestCase(testcase);