test/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-8.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: 15.4.4.14-9-a-8
description: >
    Array.prototype.indexOf - properties added into own object after
    current position are visited on an Array
includes: [runTestCase.js]
---*/

function testcase() {

        var arr = [0, , 2];

        Object.defineProperty(arr, "0", {
            get: function () {
                Object.defineProperty(arr, "1", {
                    get: function () {
                        return 1;
                    },
                    configurable: true
                });
                return 0;
            },
            configurable: true
        });

        return arr.indexOf(1) === 1;
    }
runTestCase(testcase);