test/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-17.js


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// 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.lastindexof
es5id: 15.4.4.15-8-a-17
description: >
    Array.prototype.lastIndexOf -  decreasing length of array causes
    index property not to be visited
---*/

        var arr = [0, 1, 2, "last", 4];

        Object.defineProperty(arr, "4", {
            get: function () {
                arr.length = 3;
                return 0;
            },
            configurable: true
        });

assert.sameValue(arr.lastIndexOf("last"), -1, 'arr.lastIndexOf("last")');