class RomanNumeralConverter(object): 
  def __init__(self, roman_numeral): 
    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 
 
   
import unittest 
class RomanNumeralConverterTest(unittest.TestCase): 
     
  def test_parsing_millenia(self): 
    value = RomanNumeralConverter("M") 
    self.assertEquals(1000, value.convert_to_decimal()) 
     
  def test_parsing_century(self): 
    '''THIS is a error test case''' 
    value = RomanNumeralConverter("C") 
    self.assertEquals(10, value.convert_to_decimal()) 
     
     
     
if __name__ == "__main__": 
  suite = unittest.TestLoader().loadTestsFromTestCase(RomanNumeralConverterTest) 
  unittest.TextTestRunner(verbosity=2).run(suite)