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

                var result = controller.Index();

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

                var result = controller.Index() as ViewResult;
                var concerts = result.Model as IEnumerable<Concert>;

                Assert.That(concerts.OrderByDescending(c => c.DateAndStartTime), Is.EqualTo(concerts));
            }