public void EditTripShouldReturnView()
{
TripController controller = new TripController(repo);
Trip trip4 = new Trip() { TripID = 4, DestinationID = 3, StartDate = new DateTime(2005, 3, 1), EndDate = new DateTime(2005, 3, 4)};
ViewResult result = controller.EditTrip(trip4) as ViewResult;
Assert.IsNotNull(result);
}