JSTests/test262/test/built-ins/Object/defineProperty/15.2.3.6-4-454.js

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

/*---
es5id: 15.2.3.6-4-454
description: >
    ES5 Attributes - fail to update [[Set]] attribute of accessor
    property ([[Get]] is undefined, [[Set]] is undefined,
    [[Enumerable]] is false, [[Configurable]] is false) to different
    value
---*/

        var obj = {};

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

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

        var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
assert.throws(TypeError, function() {
            Object.defineProperty(obj, "prop", {
                set: setFunc
            });
});
            var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
assert.sameValue(typeof desc1.set, "undefined", 'typeof desc1.set');
assert.sameValue(typeof desc2.set, "undefined", 'typeof desc2.set');