import unittest class Student(object): def __init__(self, name, score): self.name = name self.score = score def get_grade(self): if self.score > 100 or self.score < 0: raise ValueError if self.score >= 80: return 'A' if self.score >= 60: return 'B' return 'C' class TestStudent(unittest.TestCase): def test_80_to_100(self): s1 = Student('Bart', 80) s2 = Student('Lisa', 100) self.assertEqual(s1.get_grade(), 'A')# self.assertEqual(s2.get_grade(), 'A') def test_60_to_80(self): s1 = Student('Bart', 60) s2 = Student('Lisa', 79) self.assertEqual(s1.get_grade(), 'B') self.assertEqual(s2.get_grade(), 'B') def test_0_to_60(self): s1 = Student('Bart', 0) s2 = Student('Lisa', 59) self.assertEqual(s1.get_grade(), 'C') self.assertEqual(s2.get_grade(), 'C') def test_invalid(self): s1 = Student('Bart', -1) s2 = Student('Lisa', 101) with self.assertRaises(ValueError): s1.get_grade()# with self.assertRaises(ValueError): s2.get_grade() if __name__ == '__main__': unittest.main() #编写文档测试 def fact(n): ''' Calculate 1*2*...*n >>> fact(1) 1 >>> fact(10) 3628800 >>> fact(-1) Traceback (most recent call last): ... ValueError ''' if n < 1: raise ValueError() if n == 1: return 1 return n * fact(n - 1) if __name__=='__main__': import doctest doctest.testmod()