'If a volume is attached to a remote node, the dataset returned by
``BlockDeviceDeployer.discover_state`` is marked as
``ATTACHED_ELSEWHERE``.'

def test_only_remote_device(self):

    dataset_id = uuid4()
    volume = self.api.create_volume(dataset_id=dataset_id, size=LOOPBACK_MINIMUM_ALLOCATABLE_SIZE)
    self.api.attach_volume(volume.blockdevice_id, attach_to=u'some.other.host')
    assert_discovered_state(self, self.deployer, persistent_state=PersistentState(blockdevice_ownership={dataset_id: volume.blockdevice_id}), expected_discovered_datasets=[DiscoveredDataset(state=DatasetStates.ATTACHED_ELSEWHERE, dataset_id=volume.dataset_id, blockdevice_id=volume.blockdevice_id, maximum_size=LOOPBACK_MINIMUM_ALLOCATABLE_SIZE)])
