public void PASS_Create()
        {
            LetterTokenizer token = new LetterTokenizer("name");

            Assert.IsNotNull(token);
            Assert.AreEqual("name", token.Name);
        }
        public void PASS_Serialize()
        {
            LetterTokenizer token = new LetterTokenizer("name");

            string json = JsonConvert.SerializeObject(token);
            Assert.IsNotNull(json);

            string expectedJson = "{\"name\":{\"type\":\"letter\"}}";
            Assert.AreEqual(expectedJson, json);
        }