public void SingleElementTest()
        {
            var tree = UnbalancedSet <string> .Empty;

            tree = UnbalancedSet <string> .Insert("a", tree);

            Assert.AreEqual("[a]", DumpTree(tree));
        }
        public void ElementTest()
        {
            const string data = "How now, brown cow?";
            var          tree = data.Split().Aggregate(UnbalancedSet <string> .Empty, (current, word) => UnbalancedSet <string> .Insert(word, current));

            foreach (var word in data.Split())
            {
                Assert.IsTrue(UnbalancedSet <string> .Member(word, tree));
            }
            Assert.IsFalse(UnbalancedSet <string> .Member("wow", tree));
        }
        public void DumpTreeTest()
        {
            const string data = "How now, brown cow?";
            var          tree = data.Split().Aggregate(UnbalancedSet <string> .Empty, (current, word) => UnbalancedSet <string> .Insert(word, current));

            Assert.AreEqual("[[brown,[cow?]],How,[now,]]", DumpTree(tree));
        }