test262/test/built-ins/Object/defineProperty/15.2.3.6-4-581.js

// Copyright (c) 2012 Ecma International.  All rights reserved.
// Ecma International makes this code available under the terms and conditions set
// forth on http://hg.ecmascript.org/tests/test262/raw-file/tip/LICENSE (the
// "Use Terms").   Any redistribution of this code must retain the above
// copyright and this notice and otherwise comply with the Use Terms.

/*---
es5id: 15.2.3.6-4-581
description: ES5 Attributes - Fail to add property into object (Number instance)
includes: [propertyHelper.js]
---*/

var data = "data";
try {
    Object.defineProperty(Number.prototype, "prop", {
        get: function () {
            return data;
        },
        enumerable: false,
        configurable: true
    });
    var numObj = new Number();

    verifyNotWritable(numObj, "prop", "nocheck");

    assert(!numObj.hasOwnProperty("prop"));
    assert.sameValue(numObj.prop, "data");
    assert.sameValue(data, "data");
} finally {
    delete Number.prototype.prop;
}