public void CollieDogBarkTest()
        {
            IDog   dog  = new Collie();
            String bark = dog.Bark();

            Assert.AreEqual("The Collie says Bark Bark", bark);
        }
        public void CollieDogCreateTest()
        {
            IDog dog = new Collie();

            Assert.IsInstanceOfType(dog, typeof(Collie));
        }