public void TestIdFactory()
{
int initial_value = 4;
int expected = 5;
IdFactory.SetCurrentId(initial_value);
int actual = IdFactory.GetCurrentId();
Assert.AreEqual(expected, actual); //should get the next id
int nextId = IdFactory.GetCurrentId();
Assert.AreNotEqual(expected, nextId); //should not be the same as last gotten id
}