private IEnumerable <ThreeDigit> SplitToThree(string number)
{
List <ThreeDigit> group = new List <ThreeDigit>();
for (int i = number.Length - 3; i >= 0; i -= 3)
{
group.Add(ThreeDigit.Of(number.Substring(i, 3).TrimStart('0')));
}
if (IsNotMultipleOfThree(number.Length))
{
group.Add(ThreeDigit.Of(number.Substring(0, number.Length % 3).TrimStart('0')));
}
return(group);
}
public void ThreeDigit_ToWords_Test(string expected, string number)
{
string words = ThreeDigit.Of(number).ToWords();
Assert.AreEqual(expected, words);
}