public void TestCompareTo()
{
VisitableHashtable <string, string> h1 = GetTestHashtable();
VisitableHashtable <string, string> h2 = GetTestHashtable();
h2.Add("d", "dd");
Assert.AreEqual(h1.CompareTo(h2), -1);
Assert.AreEqual(h2.CompareTo(h1), 1);
Assert.AreEqual(h1.CompareTo(h1), 0);
object o = new object();
Assert.AreEqual(h1.CompareTo(o), -1);
}
public void TestInvalidCompareTo()
{
VisitableHashtable <string, int> h = new VisitableHashtable <string, int>();
h.CompareTo(null);
}