/// <summary>
/// Command line interface to convert either arabic number or roman numerals to their corresponding opposite.
/// </summary>
/// <param name="args">either an integer representing an arabic number, or a string representing a roman numeral.</param>
/// <returns>0 if not enough arguments; 1 otherwise. displays output on console.</returns>
public static int Main(string[] args)
{
if (args == null || args.Length == 0)
{
Console.Error.WriteLine("usage: Convert <RomanNumeral-or-ArabicNumber>");
return(0);
}
int integerValue;
if (int.TryParse(args[0], out integerValue))
{
Console.WriteLine($"Converting arabic number {integerValue}");
ArabicNumberToRomanNumeralConverter arabicNumberToRomanNumeral = new ArabicNumberToRomanNumeralConverter();
Console.WriteLine(arabicNumberToRomanNumeral.Convert(integerValue));
return(1);
}
else
{
string romanNumeral = args[0];
Console.WriteLine($"Converting roman numeral {romanNumeral}");
RomanNumeralToArabicNumberConverter romanNumeralToArabicNumber = new RomanNumeralToArabicNumberConverter();
Console.WriteLine(romanNumeralToArabicNumber.Convert(romanNumeral));
return(1);
}
}
public void GivenZeroShouldReturnNothing()
{
//https://en.wikipedia.org/wiki/Roman_numerals#Zero
var converter = new ArabicNumberToRomanNumeralConverter();
Assert.Equal("", converter.Convert(0));
}
public void GivenNegativeNumberShouldReturnNothing()
{
// http://turner.faculty.swau.edu/mathematics/materialslibrary/roman/
var converter = new ArabicNumberToRomanNumeralConverter();
Assert.Equal("", converter.Convert(-11));
}
public void GivenANumberShouldGetTheExpectedRomanNumeral(int arabic, string roman)
{
var converter = new ArabicNumberToRomanNumeralConverter();
Assert.Equal(roman, converter.Convert(arabic));
}