public virtual void TestAbsoluteDifference()
{
ICounter <string> c3 = Counters.AbsoluteDifference(c1, c2);
NUnit.Framework.Assert.AreEqual(c3.GetCount("p"), 4.0);
NUnit.Framework.Assert.AreEqual(c3.GetCount("q"), 4.0);
NUnit.Framework.Assert.AreEqual(c3.GetCount("r"), 4.0);
NUnit.Framework.Assert.AreEqual(c3.GetCount("s"), 4.0);
NUnit.Framework.Assert.AreEqual(c3.GetCount("t"), 8.0);
ICounter <string> c4 = Counters.AbsoluteDifference(c2, c1);
NUnit.Framework.Assert.AreEqual(c4.GetCount("p"), 4.0);
NUnit.Framework.Assert.AreEqual(c4.GetCount("q"), 4.0);
NUnit.Framework.Assert.AreEqual(c4.GetCount("r"), 4.0);
NUnit.Framework.Assert.AreEqual(c4.GetCount("s"), 4.0);
NUnit.Framework.Assert.AreEqual(c4.GetCount("t"), 8.0);
}