JSTests/test262/test/built-ins/Object/defineProperty/15.2.3.6-4-499.js

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

/*---
es5id: 15.2.3.6-4-499
description: >
    ES5 Attributes - success to update [[Set]] attribute of accessor
    property ([[Get]] is a Function, [[Set]] is undefined,
    [[Enumerable]] is true, [[Configurable]] is true) to different
    value
---*/

var obj = {};

var getFunc = function() {
  return 1001;
};

var verifySetFunc = "data";
var setFunc = function(value) {
  verifySetFunc = value;
};

Object.defineProperty(obj, "prop", {
  get: getFunc,
  set: undefined,
  enumerable: true,
  configurable: true
});

var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");

Object.defineProperty(obj, "prop", {
  set: setFunc
});

var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
obj.prop = "overrideData";

assert.sameValue(typeof desc1.set, "undefined", 'typeof desc1.set');
assert.sameValue(desc2.set, setFunc, 'desc2.set');
assert.sameValue(verifySetFunc, "overrideData", 'verifySetFunc');