js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-9.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
description: >
    Array.prototype.lastIndexOf -  properties can be added to
    prototype after current position are visited on an Array-like
    object
---*/

var arr = {
  length: 9
};

Object.defineProperty(arr, "4", {
  get: function() {
    Object.defineProperty(Object.prototype, "1", {
      get: function() {
        return Infinity;
      },
      configurable: true
    });
    return 0;
  },
  configurable: true
});

assert.sameValue(Array.prototype.lastIndexOf.call(arr, Infinity), 1, 'Array.prototype.lastIndexOf.call(arr, Infinity)');

reportCompare(0, 0);