'``LocalVolumeManager.snapshots`` returns a ``Deferred`` that fires with
``[]`` because ``DirectoryFilesystem`` does not support snapshots.'

def test_snapshots(self):

    pair = create_local_servicepair(self)
    volume = self.successResultOf(pair.from_service.create(pair.from_service.get(MY_VOLUME)))
    self.assertEqual([], self.successResultOf(pair.remote.snapshots(volume)))
