JSTests/test262/test/built-ins/Array/prototype/indexOf/15.4.4.14-9-11.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.indexof
es5id: 15.4.4.14-9-11
description: >
    Array.prototype.indexOf - the length of iteration isn't changed by
    adding elements to the array during iteration
---*/

        var arr = [20];

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

assert.sameValue(arr.indexOf(1), -1, 'arr.indexOf(1)');