public void testMakeSet()
        {
            DisjointSets <string> disjSets = new DisjointSets <string>();

            disjSets.makeSet("a");
            Assert.AreEqual(1, disjSets.numberDisjointSets());

            disjSets.makeSet("a");
            Assert.AreEqual(1, disjSets.numberDisjointSets());

            disjSets.makeSet("b");
            Assert.AreEqual(2, disjSets.numberDisjointSets());
        }