'``CreateBlockDeviceDataset.run`` rounds up the size if the
requested size is less than ``allocation_unit``.'

def test_run_create_round_up(self):

    dataset_id = uuid4()
    volume_info = self._create_blockdevice_dataset(dataset_id=dataset_id, maximum_size=(LOOPBACK_MINIMUM_ALLOCATABLE_SIZE + 1))
    expected_volume = _blockdevicevolume_from_dataset_id(dataset_id=dataset_id, attached_to=None, size=(LOOPBACK_MINIMUM_ALLOCATABLE_SIZE + LOOPBACK_ALLOCATION_UNIT))
    self.assertEqual(expected_volume, volume_info)
