public void AddPhone()
 {
     Assert.AreEqual(0, _cache.Count);
     _cache.AddPhone("d");
     Assert.IsNotNull(_cache["d"]);
     Assert.AreEqual(1, _cache.Count);
 }
        public void Simple()
        {
            m_cache.AddPhone("a");
            m_cache.AddPhone("b");
            m_cache.AddPhone("c");
            m_cache.AddPhone("e");

            Assert.AreEqual("VCVC", m_cache.GetCVPattern("abec"));
            Assert.AreEqual("CCVV", m_cache.GetCVPattern("bcea"));
            Assert.AreEqual("VVCC", m_cache.GetCVPattern("eabc"));
        }