cryptonas/src/cryptobox/tests/test.core.blockdevice.py

#!/usr/bin/env python
#
# Copyright 2006 sense.lab e.V.
# 
# This file is part of the CryptoBox.
#
# The CryptoBox is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
# 
# The CryptoBox is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with the CryptoBox; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#

"""Unittests for cryptobox.core.tools
"""

__revision__ = "$Id$"


import cryptobox.core.blockdevice as blockdevice
from cryptobox.tests.base import CommonTestClass
from cryptobox.core.exceptions import CBInternalError
import os


# different commonly available block devices - used for testing major/minor
COMMON_DEV_INFOS = [
        ('/sys/block/hda/hda1', '/dev/hda1', '/dev/hda', (3,1)),
        ('/sys/block/sda/sda1', '/dev/sda1', '/dev/sda', (8,1)),
        ('/sys/block/ubda/ubda', '/dev/ubda1', '/dev/ubda', (98,1)),
        ('/sys/block/ubdb/ubdb1', '/dev/ubdb1', '/dev/ubdb', (98,17)),
        ]

class CoreBlockDevice(CommonTestClass):
    """All unittests for cryptoboxtools
    """

    def test_find_major_minor_of_device(self):
        """check the find_major_minor_of_device function
        """
        func = blockdevice.get_blockdevice
        # check if any of the common block devices is available
        blockdevice_found = False
        for sys_dir, dev_node, parent, major_minor in COMMON_DEV_INFOS:
            if os.path.isdir(sys_dir):
                self.assertTrue(func(dev_node).devnum == major_minor)
                blockdevice_found = True
        # we assume, that we found at least one blockdevice
        self.assertTrue(blockdevice_found)
        self.assertTrue(func("/dev/nothere") is None)


    def test_is_part_of_blockdevice(self):
        """check the is_part_of_blockdevice function
        """
        get_device = lambda devname: blockdevice.get_blockdevice(devname)
        func = lambda parent, child: get_device(parent) and get_device(parent).is_parent_of(get_device(child))
        func_raw = lambda parent: get_device(parent).is_parent_of
        self.assertTrue(func(self.blockdevice, self.device))
        self.assertFalse(func(self.blockdevice, self.blockdevice))
        self.assertFalse(func(self.device, self.blockdevice))
        self.assertFalse(func(self.device, self.device))
        self.assertFalse(func(self.blockdevice, "/dev/hde1"))
        # check if any of the common block devices is available
        blockdevice_found = False
        for sys_dir, dev_node, parent, major_minor in COMMON_DEV_INFOS:
            if os.path.isdir(sys_dir):
                self.assertFalse(func(dev_node, parent))
                self.assertTrue(func(parent, dev_node))
                blockdevice_found = True
        self.assertFalse(func("ram0", "ram1"))
        self.assertFalse(func_raw(self.blockdevice)(None))
        self.assertRaises(CBInternalError, func_raw(self.blockdevice), "")