bareon/fuel_agent/tests/test_partition_utils.py

# Copyright 2014 Mirantis, Inc.
#
# 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 mock
from oslotest import base as test_base

from fuel_agent import errors
from fuel_agent.utils import partition_utils as pu
from fuel_agent.utils import utils


class TestPartitionUtils(test_base.BaseTestCase):
    @mock.patch.object(pu, 'make_label')
    def test_wipe(self, mock_label):
        # should run call make_label method
        # in order to create new empty table which we think
        # is equivalent to wiping the old one
        pu.wipe('/dev/fake')
        mock_label.assert_called_once_with('/dev/fake')

    @mock.patch.object(utils, 'execute')
    def test_make_label(self, mock_exec):
        # should run parted OS command
        # in order to create label on a device

        # gpt by default
        pu.make_label('/dev/fake')
        mock_exec.assert_called_once_with(
            'parted', '-s', '/dev/fake', 'mklabel', 'gpt', check_exit_code=[0])
        mock_exec.reset_mock()

        # label is set explicitly
        pu.make_label('/dev/fake', label='msdos')
        mock_exec.assert_called_once_with(
            'parted', '-s', '/dev/fake',
            'mklabel', 'msdos', check_exit_code=[0])

    def test_make_label_wrong_label(self):
        # should check if label is valid
        # should raise exception if it is not
        self.assertRaises(errors.WrongPartitionLabelError,
                          pu.make_label, '/dev/fake', 'wrong')

    @mock.patch.object(utils, 'execute')
    def test_set_partition_flag(self, mock_exec):
        # should run parted OS command
        # in order to set flag on a partition

        # default state is 'on'
        pu.set_partition_flag('/dev/fake', 1, 'boot')
        mock_exec.assert_called_once_with(
            'parted', '-s', '/dev/fake', 'set', '1', 'boot', 'on',
            check_exit_code=[0])
        mock_exec.reset_mock()

        # if state argument is given use it
        pu.set_partition_flag('/dev/fake', 1, 'boot', state='off')
        mock_exec.assert_called_once_with(
            'parted', '-s', '/dev/fake', 'set', '1', 'boot', 'off',
            check_exit_code=[0])

    @mock.patch.object(utils, 'execute')
    def test_set_partition_flag_wrong_flag(self, mock_exec):
        # should check if flag is valid
        # should raise exception if it is not
        self.assertRaises(errors.WrongPartitionSchemeError,
                          pu.set_partition_flag,
                          '/dev/fake', 1, 'wrong')

    @mock.patch.object(utils, 'execute')
    def test_set_partition_flag_wrong_state(self, mock_exec):
        # should check if flag is valid
        # should raise exception if it is not
        self.assertRaises(errors.WrongPartitionSchemeError,
                          pu.set_partition_flag,
                          '/dev/fake', 1, 'boot', state='wrong')

    @mock.patch.object(pu, 'info')
    @mock.patch.object(utils, 'execute')
    def test_make_partition(self, mock_exec, mock_info):
        # should run parted OS command
        # in order to create new partition
        mock_info.return_value = {
            'parts': [
                {'begin': 0, 'end': 1000, 'fstype': 'free'},
            ]
        }
        pu.make_partition('/dev/fake', 100, 200, 'primary')
        mock_exec.assert_called_once_with(
            'parted',
            '-a', 'optimal',
            '-s', '/dev/fake',
            'unit', 'MiB',
            'mkpart', 'primary', '100', '200',
            check_exit_code=[0])

    @mock.patch.object(utils, 'execute')
    def test_make_partition_wrong_ptype(self, mock_exec):
        # should check if partition type is one of
        # 'primary' or 'logical'
        # should raise exception if it is not
        self.assertRaises(errors.WrongPartitionSchemeError, pu.make_partition,
                          '/dev/fake', 200, 100, 'wrong')

    @mock.patch.object(utils, 'execute')
    def test_make_partition_begin_overlaps_end(self, mock_exec):
        # should check if begin is less than end
        # should raise exception if it isn't
        self.assertRaises(errors.WrongPartitionSchemeError, pu.make_partition,
                          '/dev/fake', 200, 100, 'primary')

    @mock.patch.object(pu, 'info')
    @mock.patch.object(utils, 'execute')
    def test_make_partition_overlaps_other_parts(self, mock_exec, mock_info):
        # should check if begin or end overlap other partitions
        # should raise exception if it does
        mock_info.return_value = {
            'parts': [
                {'begin': 0, 'end': 100, 'fstype': 'free'},
                {'begin': 100, 'end': 200, 'fstype': 'notfree'},
                {'begin': 200, 'end': 300, 'fstype': 'free'}
            ]
        }
        self.assertRaises(errors.WrongPartitionSchemeError, pu.make_partition,
                          '/dev/fake', 99, 101, 'primary')
        self.assertRaises(errors.WrongPartitionSchemeError, pu.make_partition,
                          '/dev/fake', 100, 200, 'primary')
        self.assertRaises(errors.WrongPartitionSchemeError, pu.make_partition,
                          '/dev/fake', 200, 301, 'primary')
        self.assertEqual(mock_info.call_args_list,
                         [mock.call('/dev/fake')] * 3)

    @mock.patch.object(pu, 'info')
    @mock.patch.object(utils, 'execute')
    def test_remove_partition(self, mock_exec, mock_info):
        # should run parted OS command
        # in order to remove partition
        mock_info.return_value = {
            'parts': [
                {
                    'begin': 1,
                    'end': 100,
                    'size': 100,
                    'num': 1,
                    'fstype': 'ext2'
                },
                {
                    'begin': 100,
                    'end': 200,
                    'size': 100,
                    'num': 2,
                    'fstype': 'ext2'
                }
            ]
        }
        pu.remove_partition('/dev/fake', 1)
        mock_exec.assert_called_once_with(
            'parted', '-s', '/dev/fake', 'rm', '1', check_exit_code=[0])

    @mock.patch.object(pu, 'info')
    @mock.patch.object(utils, 'execute')
    def test_remove_partition_notexists(self, mock_exec, mock_info):
        # should check if partition does exist
        # should raise exception if it doesn't
        mock_info.return_value = {
            'parts': [
                {
                    'begin': 1,
                    'end': 100,
                    'size': 100,
                    'num': 1,
                    'fstype': 'ext2'
                },
                {
                    'begin': 100,
                    'end': 200,
                    'size': 100,
                    'num': 2,
                    'fstype': 'ext2'
                }
            ]
        }
        self.assertRaises(errors.PartitionNotFoundError, pu.remove_partition,
                          '/dev/fake', 3)