public void Index_returns_list_of_correct_Trips()
{
TripController controller = new TripController(repository, provider);
ViewResult result = controller.Index() as ViewResult;
Assert.IsNotNull(result);
EnumerableQuery <Trip> model = (EnumerableQuery <Trip>)result.ViewData.Model;
Assert.IsNotNull(model);
Assert.AreEqual(1, model.Count());
Assert.IsTrue(model.Contains(userTrip));
}