public string Add(string numeral1, string numeral2)
{
var numeral1AsSingles = _convertToSingles.Convert(numeral1);
var numeral2AsSingles = _convertToSingles.Convert(numeral2);
var sumOfSingles = numeral1AsSingles + numeral2AsSingles;
return(_convertToRomanNumerals.ConvertFromSingles(sumOfSingles));
}
public void ConvertRomanNumeralToSingles(string romanNumeral, int expectedNumerOfI)
{
var sut = new ConvertToSingles();
var result = sut.Convert(romanNumeral);
Assert.That(result.Length, Is.EqualTo(expectedNumerOfI));
}