public void Input_I_Returns_1()
 {
     Assert.AreEqual(RomanNumeralParser.Parse("I"), 1);
 }
 public void TestComplexNumerals(string input, int expectedOutput)
 {
     Assert.AreEqual(expectedOutput, RomanNumeralParser.Parse(input));
 }
 public void TestSingleNumeral(string input, int expectedOutput)
 {
     Assert.AreEqual(RomanNumeralParser.Parse(input), expectedOutput);
 }
 public void TestSubtractiveNotation(string input, int expectedOutput)
 {
     Assert.AreEqual(RomanNumeralParser.Parse(input), expectedOutput);
 }
 static void Main(string[] args)
 {
     Console.WriteLine(RomanNumeralParser.Parse("MCDXXIII"));
 }