public void FizzBuzzReturnIntegerNumber()
        {
            var numero   = 1;
            var response = fizzbuzz.Fizzbuzz(numero);

            Assert.AreEqual(numero.ToString(), response);
        }
        public void FizzbuzzReturnFizzBuzzIfNumberMultipleOfFiveAndThree()
        {
            var numero   = 15;
            var fizzbuzz = new FizzBuzz();
            var response = fizzbuzz.Fizzbuzz(numero);

            Assert.AreEqual("FizzBuzz", response);
        }