public virtual void TestNullSafeComparator()
{
IComparator <int> comp = Comparators.NullSafeNaturalComparator();
NUnit.Framework.Assert.AreEqual(0, comp.Compare(null, null));
NUnit.Framework.Assert.AreEqual(-1, comp.Compare(null, int.Parse(42)));
NUnit.Framework.Assert.AreEqual(1, comp.Compare(int.Parse(42), null));
NUnit.Framework.Assert.AreEqual(-1, comp.Compare(11, 18));
NUnit.Framework.Assert.AreEqual(0, comp.Compare(11, 11));
}