public void OlderRefCompareToNewerRef()
{
Ref older = new Ref(null);
Ref newer = new Ref(null);
Assert.IsTrue(older.CompareTo(newer) < 0);
Assert.IsTrue(newer.CompareTo(older) > 0);
}
public void RefCompareToSelfIs0()
{
Ref r = new Ref(null);
Assert.AreEqual(0, r.CompareTo(r));
}
public void RefCompareToNullIs1()
{
Ref r = new Ref(null);
Assert.AreEqual(1, r.CompareTo(null));
}