import unittest class Student(object): def __init__(self, name, score): self.name = name self.score = score def get_grade(self): if self.score <0 or self.score > 100: 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()
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Han小胖黑洲非