js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-20.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 - element to be retrieved is an own
    accessor property without a get function that overrides an
    inherited accessor property on an Array
---*/

var arr = [, 1];

Object.defineProperty(Array.prototype, "0", {
  get: function() {
    return 100;
  },
  configurable: true
});
Object.defineProperty(arr, "0", {
  set: function() {},
  configurable: true
});

assert(arr.hasOwnProperty(0), 'arr.hasOwnProperty(0) !== true');
assert.sameValue(arr.lastIndexOf(undefined), 0, 'arr.lastIndexOf(undefined)');

reportCompare(0, 0);