public void ClearIDCacheAndIncrementNextID()
{
var factory = new IDFactory();
factory.GetID(0, 0);
factory.GetID(0, 1);
factory.GetID(0);
factory.GetID(1);
factory.ClearCacheAndIncrementNextID();
Assert.AreEqual(4u, factory.GetID(0, 0));
Assert.AreEqual(5u, factory.GetID(0, 1));
Assert.AreEqual(6u, factory.GetID(0));
Assert.AreEqual(7u, factory.GetID(1));
}