public void TestXmlCallbackUrl()
        {
            _order = WebpayConnection.CreateOrder(SveaConfig.GetDefaultConfig())
                                     .SetCountryCode(TestingTool.DefaultTestCountryCode)
                                     .SetCurrency(TestingTool.DefaultTestCurrency)
                                     .SetClientOrderNumber(TestingTool.DefaultTestClientOrderNumber)
                                     .AddOrderRow(TestingTool.CreateMiniOrderRow())
                                     .AddCustomerDetails(Item.CompanyCustomer());

            var payment = new FakeHostedPayment(_order);
            payment.SetCallbackUrl("http://www.callback.nu")
                   .SetCancelUrl("http://www.cancel.com")
                   .SetReturnUrl("http://myurl.se")
                   .CalculateRequestValues();

            _xml = _xmlBuilder.GetXml(payment);

            Assert.That(_xml.Contains("<callbackurl>http://www.callback.nu</callbackurl>"), Is.True);
        }