JSTests/test262/test/built-ins/Object/defineProperty/15.2.3.6-4-23.js

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

/*---
es5id: 15.2.3.6-4-23
description: >
    Object.defineProperty - 'name' is existing an inherited data
    property (8.12.9 step 1)
---*/

var proto = {};
Object.defineProperty(proto, "foo", {
  value: 11,
  configurable: false
});

var ConstructFun = function() {};
ConstructFun.prototype = proto;
var obj = new ConstructFun();

Object.defineProperty(obj, "foo", {
  configurable: true
});

assert(obj.hasOwnProperty("foo"), 'obj.hasOwnProperty("foo") !== true');
assert.sameValue(typeof obj.foo, "undefined", 'typeof obj.foo');