Method test_special_values

Lib/test/test_statistics.py:1908–1917

(self)

            fmean([10, 20, 60], 70)                 # too many arguments

    def test_special_values(self):
        # Rules for special values are inherited from math.fsum()
        fmean = statistics.fmean
        NaN = float('Nan')
        Inf = float('Inf')
        self.assertTrue(math.isnan(fmean([10, NaN])), 'nan')
        self.assertTrue(math.isnan(fmean([NaN, Inf])), 'nan and infinity')
        self.assertTrue(math.isinf(fmean([10, Inf])), 'infinity')
        with self.assertRaises(ValueError):
            fmean([Inf, -Inf])

    def test_weights(self):
        fmean = statistics.fmean