import unittest 
 
######################################################################## 
class RomanNumeralConverter(object): 
  """converter the Roman Number""" 
 
  #---------------------------------------------------------------------- 
  def __init__(self, roman_numeral): 
    """Constructor""" 
    self.roman_numeral = roman_numeral 
    self.digit_map = {"M":1000, "D":500, "C":100, "L":50, "X":10, 
             "V":5, "I":1} 
     
  def convert_to_decimal(self): 
    val = 0 
    for char in self.roman_numeral: 
      val += self.digit_map[char] 
    return val 
   
######################################################################## 
class RomanNumeralConverterTest(unittest.TestCase): 
  """test class""" 
  def test_parsing_millenia(self): 
    value = RomanNumeralConverter("M") 
    self.assertEquals(1000, value.convert_to_decimal()) 
   
if __name__ == "__main__": 
  unittest.main() 
   

.
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Ran 1 test in 0.000s

OK