具体代码如下：

class RomanNumeralConverter(object): 
 def __init__(self): 
 self.digit_map = {"M":1000, "D":500, "C":100, "L":50, "X":10, "V":5, "I":1} 
 
 def convert_to_decimal(self, roman_numeral): 
 val = 0 
 for char in roman_numeral: 
 val += self.digit_map[char] 
 return val 
 
import unittest 
class RomanNumeralConverterTest(unittest.TestCase): 
 def setUp(self): 
 self.cvt = RomanNumeralConverter() 
 
 def test_parsing_millenia(self): 
 self.assertEquals(1000, self.cvt.convert_to_decimal("M")) 
 
 def test_parsing_century(self): 
 self.assertEquals(100, self.cvt.convert_to_decimal("C")) 
 
class RomanNumeralConverterCombo(unittest.TestCase): 
 def setUp(self): 
 self.cvt = RomanNumeralConverter() 
 
 def test_multi_millenia(self): 
 self.assertEquals(4000, self.cvt.convert_to_decimal("MMMM")) 
 
 def test_add_up(self): 
 self.assertEquals(2010, self.cvt.convert_to_decimal("MMX")) 
 
if __name__ == "__main__": 
 suite1 = unittest.TestLoader().loadTestsFromTestCase(RomanNumeralConverterTest) 
 suite2 = unittest.TestLoader().loadTestsFromTestCase(RomanNumeralConverterCombo) 
 suite = unittest.TestSuite([suite1, suite2]) 
 unittest.TextTestRunner(verbosity=2).run(suite) 

运行结果如下：

test_parsing_century (__main__.RomanNumeralConverterTest) ... ok
test_parsing_millenia (__main__.RomanNumeralConverterTest) ... ok
test_add_up (__main__.RomanNumeralConverterCombo) ... ok
test_multi_millenia (__main__.RomanNumeralConverterCombo) ... ok

----------------------------------------------------------------------
Ran 4 tests in 0.032s

OK

本文实例与前面几篇文章的内容基本一致，只在main中有些不同：

suite1 = unittest.TestLoader().loadTestsFromTestCase(RomanNumeralConverterTest) 
 suite2 = unittest.TestLoader().loadTestsFromTestCase(RomanNumeralConverterCombo) 
 suite = unittest.TestSuite([suite1, suite2]) 
 unittest.TextTestRunner(verbosity=2).run(suite)

希望本文所述对大家的Python程序设计有所帮助。