'The volumes returned from ``VolumeService.enumerate`` replace the old
volume with the one returned by ``Volume.change_owner``.'

def test_enumerate(self):

    volume = self.successResultOf(self.service.create(self.service.get(MY_VOLUME)))
    new_volume = self.successResultOf(volume.change_owner(self.other_node_id))
    volumes = set(self.successResultOf(self.service.enumerate()))
    self.assertEqual({new_volume}, volumes)
