Roman Numeral TDD Kata on the SSaurel's Channel

RomanNumeral.java

public String intToRoman(int arabic) {
   StringBuilder roman = new StringBuilder();

   while (arabic >= 10) {
      roman.append("X");
      arabic -= 10;
   }

   while (arabic-- > 0) {
      roman.append("I");
   }

   return roman.toString();
}