public void ConvertToStringTest1(Sex?input, string?expected)
        {
            var conv = new SexConverter();

            string?result = conv.ConvertToString(input);

            Assert.AreEqual(expected, result);
        }
        public void ConvertToStringTest2()
        {
            var conv = new SexConverter();

            _ = conv.ConvertToString("Hi!");
        }