public void MustConvertNumberI()
        {
            var number = RomanNumberConverter.Convert("I");

            Assert.AreEqual(1, number);
        }
        public void MustConvertNumberXXVII()
        {
            var number = RomanNumberConverter.Convert("XXVII");

            Assert.AreEqual(27, number);
        }
        public void MustConvertNumberCXXIX()
        {
            var number = RomanNumberConverter.Convert("CXXIX");

            Assert.AreEqual(129, number);
        }
        public void MustConvertNumberV()
        {
            var number = RomanNumberConverter.Convert("V");

            Assert.AreEqual(5, number);
        }