diskimage-builder/diskimage_builder/tests/functional/test_blockdevice.py

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# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import fixtures
import logging
import subprocess
import testtools
from diskimage_builder.block_device.blockdevice import BlockDevice
from diskimage_builder.block_device.level0 import localloop
from diskimage_builder.logging_config import setup
# Setup Logging
setup()
class StateSavingBlockDevice(BlockDevice):
def cmd_create(self):
logging.info("StateSavingBlockDevice cmd_create()")
super(StateSavingBlockDevice, self).cmd_create()
_, _, self.state = self.load_state()
class BlockDeviceFixture(fixtures.Fixture):
def __init__(self, *args, **kwargs):
logging.info("BlockDeviceFixture constructor")
self.args = args
self.kwargs = kwargs
self.bd = None
def _setUp(self):
logging.info("BlockDeviceFixture _setUp()")
self.bd = StateSavingBlockDevice(*self.args, **self.kwargs)
self.addCleanup(self.cleanup_loopbacks)
def _assert_loopback_detatched(self, loopback):
if localloop.LocalLoop.loopdev_is_attached(loopback):
localloop.LocalLoop.loopdev_detach(loopback)
def cleanup_loopbacks(self):
for lb_dev in self.bd.state.get('loopback_devices', []):
self._assert_loopback_detatched(lb_dev)
class TestBlockDevice(testtools.TestCase):
def _assert_loopbacks_cleaned(self, blockdevice):
for lb_dev in blockdevice.state.get('loopback_devices', []):
self.assertEqual(False,
localloop.LocalLoop.loopdev_is_attached(lb_dev))
# ToDo: This calls sudo to setup the loop device - which is not allowed.
# Currently no idea how to continue here...
def _DONT_test_create_default_config(self):
logging.info("test_create_default_config called")
builddir = self.useFixture(fixtures.TempDir()).path
imagedir = self.useFixture(fixtures.TempDir()).path
logging.info("builddir [%s]", builddir)
logging.info("imagedir [%s]", imagedir)
logging.info("Calling BlockDevice constructor")
bd = self.useFixture(BlockDeviceFixture(
None, builddir, '%dKiB' % (1024 * 1024), imagedir
)).bd
logging.info("Calling BlockDevice cmd_create()")
bd.cmd_create()
logging.info("Check result")
logging.info("State [%s]", bd.state)
self.assertTrue('device' in bd.state['image0'])
lb_dev = bd.state['image0']['device']
# partprobe loopback so we can get partition info
args = ['sudo', 'partprobe', lb_dev]
logging.info("Call: %s", args)
subprocess.check_call(args)
bd.cmd_cleanup()
self._assert_loopbacks_cleaned(bd)