JSTests/test262/test/built-ins/Object/defineProperty/15.2.3.6-3-165-1.js

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

/*---
es5id: 15.2.3.6-3-165-1
description: >
    Object.defineProperty - 'Attributes' is a Function object which
    implements its own [[Get]] method to access the 'writable'
    property of prototype object (8.10.5 step 6.b)
---*/

var obj = {};

Function.prototype.writable = true;
var funObj = function(a, b) {
  return a + b;
};

Object.defineProperty(obj, "property", funObj);

var beforeWrite = obj.hasOwnProperty("property");

obj.property = "isWritable";

var afterWrite = (obj.property === "isWritable");

assert.sameValue(beforeWrite, true, 'beforeWrite');
assert.sameValue(afterWrite, true, 'afterWrite');