def METHOD_NAME(self):
    ds1 = create_default_dataset(time_mode="time")
    ds2 = self.processor.pre_process(ds1)
    self.assertIsNot(ds1, ds2)
    ds1 = create_default_dataset(time_mode="time_bnds")
    ds2 = self.processor.pre_process(ds1)
    self.assertIsNot(ds1, ds2)
    ds1 = create_default_dataset(time_mode="time_coverage")
    ds2 = self.processor.pre_process(ds1)
    self.assertIs(ds1, ds2)
    ds1 = create_default_dataset(time_mode="start_stop_time")
    ds2 = self.processor.pre_process(ds1)
    self.assertIs(ds1, ds2)