def test_util_solarelevation_function_overcast_no_error(self):
        try:
            util.solarelevation_function_overcast(self.lat, self.lon,
                                                  self.aware)
        except NoTimeZoneInfoError:
            self.fail("""'NoTimeZoneInfoError' should not be raised \
as 'datetime' object is tz-aware.""")
 def test_util_solarelevation_function_overcast_raise_error(self):
     with self.assertRaises(NoTimeZoneInfoError):
         util.solarelevation_function_overcast(self.lat, self.lon,
                                               self.unaware)