test262/test/built-ins/Object/getOwnPropertyNames/15.2.3.4-4-b-6.js

// Copyright (c) 2012 Ecma International.  All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
es5id: 15.2.3.4-4-b-6
description: >
    Object.getOwnPropertyNames - elements of the returned array are
    configurable
---*/

var obj = {
  "a": "a"
};

var result = Object.getOwnPropertyNames(obj);

var beforeDeleted = (result.hasOwnProperty("0"));
delete result[0];
var afterDeleted = (result.hasOwnProperty("0"));

assert(beforeDeleted, 'beforeDeleted !== true');
assert.sameValue(afterDeleted, false, 'afterDeleted');