public void User_Can_Not_Submit_Invalid_Changes_On_Event()
{
//Arrange
controller.ModelState.AddModelError("error", "error");
//Act
var result = controller.Edit(selectedEvent);
//Assert
result.AssertViewRendered().ForView("EventForm");
mock.Verify(m => m.SaveEvent(It.IsAny<Event>()), Times.Never());
}