public void SpeakLeet_STurnsToz_saZZ()
        {
            Leet l33tspeak = new Leet();

            Assert.AreEqual("sazz sazz sazz", l33tspeak.SpeakLeet("sass sass sass"));
        }
        public void SpeakLeet_eTurnsTo3_3gg()
        {
            Leet l33tspeak = new Leet();

            Assert.AreEqual("3gg", l33tspeak.SpeakLeet("egg"));
        }
        public void SpeakLeet_0TurnsToO_d0()
        {
            Leet l33tspeak = new Leet();

            Assert.AreEqual("d0", l33tspeak.SpeakLeet("d0"));
        }