Method test_float_nan

Lib/test/test_statistics.py:749–757

(self)

                self.assertTrue(math.isinf(ratio[0]))

    def test_float_nan(self):
        NAN = float("NAN")
        class MyFloat(float):
            pass
        for nan in (NAN, MyFloat(NAN)):
            ratio = statistics._exact_ratio(nan)
            self.assertTrue(math.isnan(ratio[0]))
            self.assertIs(ratio[1], None)
            self.assertEqual(type(ratio[0]), type(nan))

    def test_decimal_nan(self):
        NAN = Decimal("NAN")