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#!/usr/bin/python

#

# Copyright (C) 2013 Google Inc.

#

# This program 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.

#

# This program 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 this program; if not, write to the Free Software

# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

# 02110-1301, USA.

"""Script for unittesting the ganeti.utils.storage module"""

import mock

import unittest

from ganeti import constants

from ganeti import objects

from ganeti.utils import storage

import testutils

class TestGetStorageUnitForDiskTemplate(unittest.TestCase):

  def setUp(self):

    self._default_vg_name = "some_vg_name"

    self._cluster = mock.Mock()

    self._cluster.file_storage_dir = "my/file/storage/dir"

    self._cluster.shared_file_storage_dir = "my/shared/file/storage/dir"

    self._cfg = mock.Mock()

    self._cfg.GetVGName = mock.Mock(return_value=self._default_vg_name)

    self._cfg.GetClusterInfo = mock.Mock(return_value=self._cluster)

  def testGetDefaultStorageUnitForDiskTemplateLvm(self):

    for disk_template in [constants.DT_DRBD8, constants.DT_PLAIN]:

      (storage_type, storage_key) = \

          storage._GetDefaultStorageUnitForDiskTemplate(self._cfg,

                                                        disk_template)

      self.assertEqual(storage_type, constants.ST_LVM_VG)

      self.assertEqual(storage_key, self._default_vg_name)

  def testGetDefaultStorageUnitForDiskTemplateFile(self):

    (storage_type, storage_key) = \

        storage._GetDefaultStorageUnitForDiskTemplate(self._cfg,

                                                      constants.DT_FILE)

    self.assertEqual(storage_type, constants.ST_FILE)

    self.assertEqual(storage_key, self._cluster.file_storage_dir)

  def testGetDefaultStorageUnitForDiskTemplateSharedFile(self):

    (storage_type, storage_key) = \

        storage._GetDefaultStorageUnitForDiskTemplate(self._cfg,

                                                      constants.DT_SHARED_FILE)

    self.assertEqual(storage_type, constants.ST_FILE)

    self.assertEqual(storage_key, self._cluster.shared_file_storage_dir)

  def testGetDefaultStorageUnitForDiskTemplateDiskless(self):

    (storage_type, storage_key) = \

        storage._GetDefaultStorageUnitForDiskTemplate(self._cfg,

                                                      constants.DT_DISKLESS)

    self.assertEqual(storage_type, constants.ST_DISKLESS)

    self.assertEqual(storage_key, None)

  def testGetDefaultStorageUnitForSpindles(self):

    (storage_type, storage_key) = \

        storage._GetDefaultStorageUnitForSpindles(self._cfg)

    self.assertEqual(storage_type, constants.ST_LVM_PV)

    self.assertEqual(storage_key, self._default_vg_name)

class TestGetStorageUnitsOfCluster(unittest.TestCase):

  def setUp(self):

    storage._GetDefaultStorageUnitForDiskTemplate = \

        mock.Mock(return_value=("foo", "bar"))

    self._cluster_cfg = objects.Cluster()

    self._enabled_disk_templates = \

        [constants.DT_DRBD8, constants.DT_PLAIN, constants.DT_FILE,

         constants.DT_SHARED_FILE]

    self._cluster_cfg.enabled_disk_templates = \

        self._enabled_disk_templates

    self._cfg = mock.Mock()

    self._cfg.GetClusterInfo = mock.Mock(return_value=self._cluster_cfg)

    self._cfg.GetVGName = mock.Mock(return_value="some_vg_name")

  def testGetStorageUnitsOfCluster(self):

    storage_units = storage.GetStorageUnitsOfCluster(self._cfg)

    self.assertEqual(len(storage_units), len(self._enabled_disk_templates))

  def testGetStorageUnitsOfClusterWithSpindles(self):

    storage_units = storage.GetStorageUnitsOfCluster(

        self._cfg, include_spindles=True)

    self.assertEqual(len(storage_units), len(self._enabled_disk_templates) + 1)

    self.assertTrue(constants.ST_LVM_PV in [st for (st, sk) in storage_units])

class TestGetStorageUnits(unittest.TestCase):

  def setUp(self):

    storage._GetDefaultStorageUnitForDiskTemplate = \

        mock.Mock(return_value=("foo", "bar"))

    self._cfg = mock.Mock()

  def testGetStorageUnits(self):

    disk_templates = [constants.DT_FILE, constants.DT_SHARED_FILE]

    storage_units = storage.GetStorageUnits(self._cfg, disk_templates)

    self.assertEqual(len(storage_units), len(disk_templates))

  def testGetStorageUnitsLvm(self):

    disk_templates = [constants.DT_PLAIN, constants.DT_DRBD8]

    storage_units = storage.GetStorageUnits(self._cfg, disk_templates)

    self.assertEqual(len(storage_units), len(disk_templates) + 1)

class TestLookupSpaceInfoByStorageType(unittest.TestCase):

  def setUp(self):

    self._space_info = [

        {"type": st, "name": st + "_key", "storage_size": 0, "storage_free": 0}

        for st in constants.STORAGE_TYPES]

  def testValidLookup(self):

    query_type = constants.ST_LVM_PV

    result = storage.LookupSpaceInfoByStorageType(self._space_info, query_type)

    self.assertEqual(query_type, result["type"])

  def testNotInList(self):

    result = storage.LookupSpaceInfoByStorageType(self._space_info,

                                                  "non_existing_type")

    self.assertEqual(None, result)

if __name__ == "__main__":

  testutils.GanetiTestProgram()