public void AcsCommand_Run_UsesBindingFromNotification()
        {
            var options = StubFactory.CreateOptions();
            options.Notifications.GetBinding = r => new StubSaml2Binding();

            var subject = new AcsCommand();
            subject.Invoking(s => s.Run(new HttpRequestData("GET", new Uri("http://host")), options))
                .ShouldThrow<NotImplementedException>()
                .WithMessage("StubSaml2Binding.*");
        }