test/built-ins/Object/defineProperty/15.2.3.6-4-420.js


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

/*---
es5id: 15.2.3.6-4-420
description: >
    ES5 Attributes - Failed to add a property to an object when the
    object's prototype has a property with the same name and
    [[Writable]] set to false(Function.prototype.bind)
includes: [propertyHelper.js]
---*/

var foo = function () { };
try {
    Object.defineProperty(Function.prototype, "prop", {
        value: 1001,
        writable: false,
        enumerable: false,
        configurable: true
    });

    var obj = foo.bind({});
    assert(!obj.hasOwnProperty("prop"));
    verifyNotWritable(foo, "prop", "noCheckOwnProp");
} finally {
    delete Function.prototype.prop;
}