Method test_error_cases

Lib/test/test_statistics.py:2678–2698

(self)

            self.assertTrue(sizes <= group_sizes)

    def test_error_cases(self):
        quantiles = statistics.quantiles
        StatisticsError = statistics.StatisticsError
        with self.assertRaises(TypeError):
            quantiles()                         # Missing arguments
        with self.assertRaises(TypeError):
            quantiles([10, 20, 30], 13, n=4)    # Too many arguments
        with self.assertRaises(TypeError):
            quantiles([10, 20, 30], 4)          # n is a positional argument
        with self.assertRaises(StatisticsError):
            quantiles([10, 20, 30], n=0)        # n is zero
        with self.assertRaises(StatisticsError):
            quantiles([10, 20, 30], n=-1)       # n is negative
        with self.assertRaises(TypeError):
            quantiles([10, 20, 30], n=1.5)      # n is not an integer
        with self.assertRaises(ValueError):
            quantiles([10, 20, 30], method='X') # method is unknown
        with self.assertRaises(StatisticsError):
            quantiles([], n=4)                  # not enough data points
        with self.assertRaises(TypeError):
            quantiles([10, None, 30], n=4)      # data is non-numeric


class TestBivariateStatistics(unittest.TestCase):