<commit_before># Copyright Hybrid Logic Ltd.  See LICENSE file for details.

"""
Tests for ``flocker.node.agents.blockdevice``.
"""

import os
from uuid import UUID, uuid4
from subprocess import STDOUT, PIPE, Popen, check_output

import psutil

from zope.interface.verify import verifyObject

from pyrsistent import InvariantException

from twisted.python.runtime import platform
from twisted.python.filepath import FilePath
from twisted.trial.unittest import SynchronousTestCase, SkipTest

from eliot.testing import validate_logging, LoggedAction

from .. import blockdevice

from ..blockdevice import (
    BlockDeviceDeployer, LoopbackBlockDeviceAPI, IBlockDeviceAPI,
    BlockDeviceVolume, UnknownVolume, AlreadyAttachedVolume,
    CreateBlockDeviceDataset, UnattachedVolume,
    DestroyBlockDeviceDataset, UnmountBlockDevice, DetachVolume,
    DestroyVolume,
    _losetup_list_parse, _losetup_list, _blockdevicevolume_from_dataset_id,
    DESTROY_BLOCK_DEVICE_DATASET, UNMOUNT_BLOCK_DEVICE, DETACH_VOLUME,
    DESTROY_VOLUME,
)

from ... import InParallel, IStateChange
from ...testtools import ideployer_tests_factory, to_node
from ....testtools import run_process
from ....control import (
    Dataset, Manifestation, Node, NodeState, Deployment, DeploymentState,
    NonManifestDatasets,<commit_msg>Add missing imports.<commit_after># Copyright Hybrid Logic Ltd.  See LICENSE file for details.

"""
Tests for ``flocker.node.agents.blockdevice``.
"""

import os
from uuid import UUID, uuid4
from subprocess import STDOUT, PIPE, Popen, check_output

import psutil

from zope.interface.verify import verifyObject

from pyrsistent import InvariantException, PRecord, field

from twisted.python.runtime import platform
from twisted.python.filepath import FilePath
from twisted.trial.unittest import SynchronousTestCase, SkipTest

from eliot.testing import validate_logging, LoggedAction

from .. import blockdevice

from ..blockdevice import (
    BlockDeviceDeployer, LoopbackBlockDeviceAPI, IBlockDeviceAPI,
    BlockDeviceVolume, UnknownVolume, AlreadyAttachedVolume,
    CreateBlockDeviceDataset, UnattachedVolume,
    DestroyBlockDeviceDataset, UnmountBlockDevice, DetachVolume,
    DestroyVolume,
    _losetup_list_parse, _losetup_list, _blockdevicevolume_from_dataset_id,
    DESTROY_BLOCK_DEVICE_DATASET, UNMOUNT_BLOCK_DEVICE, DETACH_VOLUME,
    DESTROY_VOLUME,
)

from ... import InParallel, IStateChange
from ...testtools import ideployer_tests_factory, to_node
from ....testtools import run_process
from ....control import (
    Dataset, Manifestation, Node, NodeState, Deployment, DeploymentState,
    NonManifestDatasets,
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