test_timeseries.py 文件源码

def test_NaT_methods(self):
        # GH 9513
        raise_methods = ['astimezone', 'combine', 'ctime', 'dst',
                         'fromordinal', 'fromtimestamp', 'isocalendar',
                         'strftime', 'strptime', 'time', 'timestamp',
                         'timetuple', 'timetz', 'toordinal', 'tzname',
                         'utcfromtimestamp', 'utcnow', 'utcoffset',
                         'utctimetuple']
        nat_methods = ['date', 'now', 'replace', 'to_datetime', 'today']
        nan_methods = ['weekday', 'isoweekday']

        for method in raise_methods:
            if hasattr(NaT, method):
                self.assertRaises(ValueError, getattr(NaT, method))

        for method in nan_methods:
            if hasattr(NaT, method):
                self.assertTrue(np.isnan(getattr(NaT, method)()))

        for method in nat_methods:
            if hasattr(NaT, method):
                self.assertIs(getattr(NaT, method)(), NaT)

        # GH 12300
        self.assertEqual(NaT.isoformat(), 'NaT')