public void RenderTheDetailsView()
            {
                var controller = new ConcertsController();

                var result = controller.Details(1);

                result.AssertViewRendered().ForView("Details").WithViewData<Concert>();
            }
            public void DisplayTheConcertRequested()
            {
                var controller = new ConcertsController();

                var result = controller.Details(1) as ViewResult;
                var concert = result.Model as Concert;

                Assert.That(concert.Id, Is.EqualTo(1));
            }