public void unregisterGuestTest()
{
string matricId = "test2";
int eventId = 2;
bool actual = EventModel.unregisterGuest(matricId, eventId);
bool result = false;
foreach (Student s in EventModel.getByID(2).Guests)
if (s.MatricId == "test2")
result = true;
Assert.IsFalse(result);
}