def test_dataset_elsewhere(self):
        uuid = uuid4()
        dataset_id = uuid4()
        maximum_size = int(GiB(1).bytes)
        dataset = Dataset(
            dataset_id=unicode(dataset_id),
            maximum_size=maximum_size,
        )
        manifestation = Manifestation(
            dataset=dataset, primary=True
        )
        node = u"192.0.2.1"
        configuration = Deployment(
            nodes={
                Node(
                    uuid=uuid,
                    manifestations={unicode(dataset_id): manifestation},
                )
            }
        )
        node_state = NodeState(
            uuid=uuid, hostname=node, applications=None, manifestations={},
            devices={}, paths={})
        state = DeploymentState(nodes={node_state})
        deployer = create_blockdevicedeployer(
            self, hostname=node, node_uuid=uuid,
        )
        local_state = BlockDeviceDeployerLocalState(
            node_uuid=uuid,
            hostname=node,
            datasets=dataset_map_from_iterable([
                DiscoveredDataset(
                    state=DatasetStates.ATTACHED_ELSEWHERE,
                    dataset_id=dataset_id,
                    maximum_size=maximum_size,
                    blockdevice_id=_create_blockdevice_id_for_test(dataset_id),
                ),
            ]),
        )
        changes = deployer.calculate_changes(configuration, state, local_state)
        self.assertEqual(
            in_parallel(changes=[NoOp(sleep=timedelta(seconds=3))]),
            changes
        )
If block device is attached elsewhere but is part of the configuration
dataset/ETHPy150Open ClusterHQ/flocker/flocker/node/agents/test/test_blockdevice.py/BlockDeviceDeployerCreationCalculateChangesTests.test_dataset_elsewhere