JS Roman Numerals Kata

roman.js

function multipleChar(theChar, times){
  var result = "";
  for(var i = 0;i < times;i++){
    result += theChar;
  }
  return result;
}

CHAR_LOOKUP = [
  {
    "char":"X",
    "num":10
  }, 
  {
    "char":"V",
    "num":5
  }, 
{
    "char":"I",
    "num":1
  }
]

function toRoman(num){
    if(num == 0) {
      return "Nulla";
    } 
    
    var result = ""
    var previous_char = null;
    for(var i = 0; i < CHAR_LOOKUP.length; i++){
       var current_char = CHAR_LOOKUP[i];
       var new_entry = multipleChar(current_char.char,
                               Math.floor(num / current_char.num));
       
       if(new_entry == multipleChar(current_char.char, 4)){
           new_entry = current_char.char + previous_char.char;
       }
       
       num = num % current_char.num;
       result +=  new_entry;
       console.log(result);
       previous_char = current_char;
    }

    return result;
}

spec.js

describe('Roman Numeral Kata',function(){
  
  it('0 returns Nulla',function(){
    expect(toRoman(0)).toBe('Nulla');
  });

    it('1 returns I',function(){
    expect(toRoman(1)).toBe('I');
  });
  
  it('2 returns II',function(){
    expect(toRoman(2)).toBe('II');
  });
  
    it('5 returns V',function(){
    expect(toRoman(5)).toBe('V');
  });
 
     it('4 returns IV',function(){
    expect(toRoman(4)).toBe('IV');
  });
 
      it('10 returns X',function(){
    expect(toRoman(10)).toBe('X');
  });
 

});