public void RomanNumeral_Parse_ClassicNotation()
{
Assert.AreEqual(1, RomanNumeral.Parse("I").Number);
Assert.AreEqual(2, RomanNumeral.Parse("II").Number);
Assert.AreEqual(3, RomanNumeral.Parse("III").Number);
Assert.AreEqual(4, RomanNumeral.Parse("IIII").Number);
Assert.AreEqual(5, RomanNumeral.Parse("V").Number);
Assert.AreEqual(6, RomanNumeral.Parse("VI").Number);
Assert.AreEqual(7, RomanNumeral.Parse("VII").Number);
Assert.AreEqual(8, RomanNumeral.Parse("VIII").Number);
Assert.AreEqual(9, RomanNumeral.Parse("VIIII").Number);
Assert.AreEqual(10, RomanNumeral.Parse("X").Number);
Assert.AreEqual(11, RomanNumeral.Parse("XI").Number);
Assert.AreEqual(1910, RomanNumeral.Parse("MDCCCCX").Number);
Assert.AreEqual(1910, RomanNumeral.Parse("MCMX").Number);
Assert.AreEqual(118, RomanNumeral.Parse("CXVIII").Number);
Assert.AreEqual(118, RomanNumeral.Parse("CIIXX").Number);
Assert.AreEqual(118, RomanNumeral.Parse("CXIIX").Number);
Assert.AreEqual(119, RomanNumeral.Parse("CXVIIII").Number);
Assert.AreEqual(119, RomanNumeral.Parse("CXIX").Number);
Assert.AreEqual(0, RomanNumeral.Parse("NULLA").Number);
}
public void RomanNumeral_Parse_InvalidClassicNotation()
{
//substractive notation
Assert.IsNull(RomanNumeral.Parse("IV"));
Assert.IsNull(RomanNumeral.Parse("IX"));
//invalid order
Assert.IsNull(RomanNumeral.Parse("IVL"));
//valid order
Assert.IsNotNull(RomanNumeral.Parse("LVI"));
}
public static string operator -(string r1, RomanNumeral r2)
{
var r = RomanNumeral.Parse(r1) + r2;
return(r.ToString());
}
public static RomanNumeral operator +(RomanNumeral r1, string r2)
{
return(r1 + RomanNumeral.Parse(r2));
}