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# Copyright 2019 Cloudbase Solutions Srl
# All Rights Reserved.
#
# 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 os
import tempfile
from os_win import constants
from os_win.tests.functional import test_base
from os_win import utilsfactory
class VhdUtilsTestCase(test_base.OsWinBaseFunctionalTestCase):
def setUp(self):
super(VhdUtilsTestCase, self).setUp()
self._vhdutils = utilsfactory.get_vhdutils()
self._diskutils = utilsfactory.get_diskutils()
self._pathutils = utilsfactory.get_pathutils()
def _create_temp_vhd(self, size_mb=32,
vhd_type=constants.VHD_TYPE_DYNAMIC):
f = tempfile.TemporaryFile(suffix='.vhdx', prefix='oswin_vhdtest_')
f.close()
self._vhdutils.create_vhd(f.name, vhd_type,
max_internal_size=size_mb << 20)
self.addCleanup(os.unlink, f.name)
return f.name
def _create_temp_symlink(self, target, target_is_dir):
f = tempfile.TemporaryFile(prefix='oswin_vhdtest_link_')
f.close()
self._pathutils.create_sym_link(f.name, target, target_is_dir)
if target_is_dir:
self.addCleanup(os.rmdir, f.name)
else:
self.addCleanup(os.unlink, f.name)
return f.name
def test_attach_detach(self):
vhd_path = self._create_temp_vhd()
# We'll make sure that we can detect attached vhds, even when the
# paths contain symlinks.
vhd_link = self._create_temp_symlink(vhd_path, target_is_dir=False)
vhd_dir_link = self._create_temp_symlink(os.path.dirname(vhd_path),
target_is_dir=True)
# A second, indirect link.
vhd_link2 = os.path.join(vhd_dir_link,
os.path.basename(vhd_path))
def _check_attached(expect_attached):
# Let's try both approaches and all paths pointing to our image.
paths = [vhd_path, vhd_link, vhd_link2]
for path in paths:
self.assertEqual(
expect_attached,
self._vhdutils.is_virtual_disk_file_attached(path))
self.assertEqual(
expect_attached,
self._diskutils.is_virtual_disk_file_attached(path))
_check_attached(False)
try:
self._vhdutils.attach_virtual_disk(vhd_path)
_check_attached(True)
finally:
self._vhdutils.detach_virtual_disk(vhd_path)
_check_attached(False)
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