public void Test_GetBytes()
        {
            var ansel = new AnselEncoding();

            char[] chars = null;
            Assert.Throws(typeof(ArgumentNullException), () => { ansel.GetBytes(chars, 0, 0, null, 0); });
            chars = new char[] { ' ' };
            byte[] bytes = null;
            Assert.Throws(typeof(ArgumentNullException), () => { ansel.GetBytes(chars, 0, 0, bytes, 0); });
            bytes = new byte[0];
            Assert.Throws(typeof(ArgumentOutOfRangeException), () => { ansel.GetBytes(chars, -1, 0, bytes, 0); });

            string s = null;

            Assert.Throws(typeof(ArgumentNullException), () => { ansel.GetBytes(s, 0, 0, null, 0); });
        }
        public void Test_Complex()
        {
            var ansel = new AnselEncoding();

            Assert.IsNotNull(ansel);

            byte[] data;
            string res, sampleUnic, sampleAnsel;

            // code: E0 (Unicode: hook above, 0309)/low rising tone mark/
            sampleAnsel = "αAαBαCαDαEαFαGαHαIαJαKαLαMαNαOαPαQαRαSαTαUαVαWαXαYαZ";
            sampleUnic  = "ẢB̉C̉D̉ẺF̉G̉H̉ỈJ̉K̉L̉M̉N̉ỎP̉Q̉R̉S̉T̉ỦV̉W̉X̉ỶZ̉";

            //Assert.AreEqual(52, ansel.GetByteCount(sampleAnsel));

            //chars = sampleUnic.ToCharArray();
            //Assert.AreEqual(52, ansel.GetByteCount(chars, 0, chars.Length));
            //Assert.AreEqual(52, ansel.GetByteCount(sampleUnic));

            data = Encoding.GetEncoding(437).GetBytes(sampleAnsel);
            Assert.AreEqual(52, data.Length);

            res = ansel.GetString(data);
            Assert.AreEqual(sampleUnic, res);
            Assert.AreEqual(52, res.Length);

            res = ansel.GetString(data, 0, data.Length);
            Assert.AreEqual(sampleUnic, res);
            Assert.AreEqual(52, res.Length);

            data = ansel.GetBytes(res);
            res  = Encoding.GetEncoding(437).GetString(data);
            Assert.AreEqual(sampleAnsel, res.Trim('\0')); //FIXME: ALERT!
        }