Method test_error_cases

Lib/test/test_statistics.py:1892–1906

(self)

            self.assertEqual(actual_mean, expected_mean, kind)

    def test_error_cases(self):
        fmean = statistics.fmean
        StatisticsError = statistics.StatisticsError
        with self.assertRaises(StatisticsError):
            fmean([])                               # empty input
        with self.assertRaises(StatisticsError):
            fmean(iter([]))                         # empty iterator
        with self.assertRaises(TypeError):
            fmean(None)                             # non-iterable input
        with self.assertRaises(TypeError):
            fmean([10, None, 20])                   # non-numeric input
        with self.assertRaises(TypeError):
            fmean()                                 # missing data argument
        with self.assertRaises(TypeError):
            fmean([10, 20, 60], 70)                 # too many arguments

    def test_special_values(self):
        # Rules for special values are inherited from math.fsum()