示例#1
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 def test_sum_negative(self):
     self.assertEqual(1, sum_digits(-1), "sum_digits(-1) incorrect!")
     self.assertEqual(10, sum_digits(-244), "sum_digits(-244) incorrect!")
示例#2
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 def test_sum_zero(self):
     self.assertEqual(0, sum_digits(0), "sum_digits(0) incorrect!")
示例#3
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 def test_sum_positive(self):
     self.assertEqual(10, sum_digits(1234), "sum_digits(1234) incorrect")
     self.assertEqual(10, sum_digits(244), "sum_digits(244]) incorrect")
     self.assertEqual(9, sum_digits(9), "sum_digits(9]) incorrect")