ironic-python-agent/ironic_python_agent/tests/unit/test_efi_utils.py
Julia Kreger 76accfb880 Fix UTF-16 result handling for efibootmgr
The tl;dr is that UEFI NVRAM is in encoded
in UTF-16, and when we run the efibootmgr command,
we can get unicode characters back.

Except we previously were forcing everything to be
treated as UTF-8 due to the way oslo.concurrency's
processutils module works.

This could be observed with UTF character 0x00FF
which raises up a nice exception when we try to
decode it.

Anyhow! while fixing handling of this, we discovered
we could get basically the cruft out of the NVRAM,
by getting what was most likey a truncated string
out of our own test VMs. As such, we need to also
permit decoding to be tollerant of failures.
This could be binary data or as simple as flipped
bits which get interpretted invalid characters.
As such, we have introduced such data into one of our
tests involving UEFI record de-duplication.

Closes-Bug: 2015602
Change-Id: I006535bf124379ed65443c7b283bc99ecc95568b
2023-04-17 09:14:24 -07:00

506 lines
25 KiB
Python

# 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 shutil
import tempfile
from unittest import mock
from ironic_lib import disk_utils
from oslo_concurrency import processutils
from ironic_python_agent import efi_utils
from ironic_python_agent import errors
from ironic_python_agent import hardware
from ironic_python_agent import partition_utils
from ironic_python_agent import raid_utils
from ironic_python_agent.tests.unit import base
from ironic_python_agent.tests.unit.samples import hardware_samples
from ironic_python_agent import utils
EFI_RESULT = ''.encode('utf-16')
@mock.patch.object(os, 'walk', autospec=True)
@mock.patch.object(os, 'access', autospec=False)
class TestGetEfiBootloaders(base.IronicAgentTest):
def test__no_efi_bootloaders(self, mock_access, mock_walk):
# No valid efi file.
mock_walk.return_value = [
('/boot/efi', ['EFI'], []),
('/boot/efi/EFI', ['centos', 'BOOT'], []),
('/boot/efi/EFI/centos', ['fw', 'fonts'],
['shimx64-centos.efi',
'MokManager.efi', 'mmx64.efi', 'shim.efi', 'fwupia32.efi',
'fwupx64.efi', 'shimx64.efi', 'grubenv', 'grubx64.efi',
'grub.cfg']),
('/boot/efi/EFI/centos/fw', [], []),
('/boot/efi/EFI/centos/fonts', [], ['unicode.pf2']),
('/boot/efi/EFI/BOOT', [], [])
]
result = efi_utils._get_efi_bootloaders("/boot/efi")
self.assertEqual(result, [])
mock_access.assert_not_called()
def test__get_efi_bootloaders(self, mock_access, mock_walk):
mock_walk.return_value = [
('/boot/efi', ['EFI'], []),
('/boot/efi/EFI', ['centos', 'BOOT'], []),
('/boot/efi/EFI/centos', ['fw', 'fonts'],
['shimx64-centos.efi', 'BOOTX64.CSV',
'MokManager.efi', 'mmx64.efi', 'shim.efi', 'fwupia32.efi',
'fwupx64.efi', 'shimx64.efi', 'grubenv', 'grubx64.efi',
'grub.cfg']),
('/boot/efi/EFI/centos/fw', [], []),
('/boot/efi/EFI/centos/fonts', [], ['unicode.pf2']),
('/boot/efi/EFI/BOOT', [],
['BOOTX64.EFI', 'fallback.efi', 'fbx64.efi'])
]
mock_access.return_value = True
result = efi_utils._get_efi_bootloaders("/boot/efi")
self.assertEqual(result[0], 'EFI/centos/BOOTX64.CSV')
def test__get_efi_bootloaders_no_csv(self, mock_access, mock_walk):
mock_walk.return_value = [
('/boot/efi', ['EFI'], []),
('/boot/efi/EFI', ['centos', 'BOOT'], []),
('/boot/efi/EFI/centos', ['fw', 'fonts'],
['shimx64-centos.efi',
'MokManager.efi', 'mmx64.efi', 'shim.efi', 'fwupia32.efi',
'fwupx64.efi', 'shimx64.efi', 'grubenv', 'grubx64.efi',
'grub.cfg']),
('/boot/efi/EFI/centos/fw', [], []),
('/boot/efi/EFI/centos/fonts', [], ['unicode.pf2']),
('/boot/efi/EFI/BOOT', [],
['BOOTX64.EFI', 'fallback.efi', 'fbx64.efi'])
]
mock_access.return_value = True
result = efi_utils._get_efi_bootloaders("/boot/efi")
self.assertEqual(result[0], 'EFI/BOOT/BOOTX64.EFI')
def test__get_windows_efi_bootloaders(self, mock_access, mock_walk):
mock_walk.return_value = [
('/boot/efi', ['WINDOWS'], []),
('/boot/efi/WINDOWS', ['system32'], []),
('/boot/efi/WINDOWS/system32', [],
['winload.efi'])
]
mock_access.return_value = True
result = efi_utils._get_efi_bootloaders("/boot/efi")
self.assertEqual(result[0], 'WINDOWS/system32/winload.efi')
@mock.patch.object(utils, 'execute', autospec=True)
class TestRunEfiBootmgr(base.IronicAgentTest):
fake_dev = '/dev/fake'
fake_efi_system_part = '/dev/fake1'
fake_dir = '/tmp/fake-dir'
def test__run_efibootmgr_no_bootloaders(self, mock_execute):
result = efi_utils._run_efibootmgr([], self.fake_dev,
self.fake_efi_system_part,
self.fake_dir)
expected = []
self.assertIsNone(result)
mock_execute.assert_has_calls(expected)
def test__run_efibootmgr(self, mock_execute):
mock_execute.return_value = (''.encode('utf-16'), '')
result = efi_utils._run_efibootmgr(['EFI/BOOT/BOOTX64.EFI'],
self.fake_dev,
self.fake_efi_system_part,
self.fake_dir)
expected = [mock.call('efibootmgr', '-v', binary=True),
mock.call('efibootmgr', '-v', '-c', '-d', self.fake_dev,
'-p', self.fake_efi_system_part, '-w',
'-L', 'ironic1', '-l',
'\\EFI\\BOOT\\BOOTX64.EFI', binary=True)]
self.assertIsNone(result)
mock_execute.assert_has_calls(expected)
@mock.patch.object(shutil, 'rmtree', lambda *_: None)
@mock.patch.object(tempfile, 'mkdtemp', lambda *_: '/tmp/fake-dir')
@mock.patch.object(utils, 'rescan_device', autospec=True)
@mock.patch.object(utils, 'execute', autospec=True)
@mock.patch.object(partition_utils, 'get_partition', autospec=True)
@mock.patch.object(efi_utils, 'get_partition_path_by_number', autospec=True)
@mock.patch.object(disk_utils, 'find_efi_partition', autospec=True)
class TestManageUefi(base.IronicAgentTest):
fake_dev = '/dev/fake'
fake_efi_system_part = '/dev/fake1'
fake_root_part = '/dev/fake2'
fake_root_uuid = '11111111-2222-3333-4444-555555555555'
fake_dir = '/tmp/fake-dir'
def test_no_partition(self, mock_utils_efi_part,
mock_get_part_path,
mock_get_part_uuid, mock_execute,
mock_rescan):
mock_utils_efi_part.return_value = None
self.assertRaises(errors.DeviceNotFound,
efi_utils.manage_uefi, self.fake_dev, None)
self.assertFalse(mock_get_part_uuid.called)
mock_rescan.assert_called_once_with(self.fake_dev)
def test_empty_partition_by_uuid(self, mock_utils_efi_part,
mock_get_part_path,
mock_get_part_uuid, mock_execute,
mock_rescan):
mock_utils_efi_part.return_value = None
mock_get_part_uuid.return_value = self.fake_root_part
result = efi_utils.manage_uefi(self.fake_dev, self.fake_root_uuid)
self.assertFalse(result)
mock_rescan.assert_called_once_with(self.fake_dev)
@mock.patch.object(os.path, 'exists', lambda *_: False)
@mock.patch.object(hardware, 'is_md_device', autospec=True)
@mock.patch.object(efi_utils, '_get_efi_bootloaders', autospec=True)
@mock.patch.object(os, 'makedirs', autospec=True)
def test_ok(self, mkdir_mock, mock_efi_bl, mock_is_md_device,
mock_utils_efi_part, mock_get_part_path, mock_get_part_uuid,
mock_execute, mock_rescan):
mock_utils_efi_part.return_value = {'number': '1'}
mock_get_part_path.return_value = self.fake_efi_system_part
mock_is_md_device.return_value = False
mock_efi_bl.return_value = ['EFI/BOOT/BOOTX64.EFI']
mock_execute.side_effect = iter([('', ''), (EFI_RESULT, ''),
(EFI_RESULT, ''), ('', ''),
('', ''), ('', ''),
('', '')])
expected = [mock.call('mount', self.fake_efi_system_part,
self.fake_dir + '/boot/efi'),
mock.call('efibootmgr', '-v', binary=True),
mock.call('efibootmgr', '-v', '-c', '-d', self.fake_dev,
'-p', '1', '-w',
'-L', 'ironic1', '-l',
'\\EFI\\BOOT\\BOOTX64.EFI', binary=True),
mock.call('umount', self.fake_dir + '/boot/efi',
attempts=3, delay_on_retry=True),
mock.call('sync')]
result = efi_utils.manage_uefi(self.fake_dev, self.fake_root_uuid)
self.assertTrue(result)
mkdir_mock.assert_called_once_with(self.fake_dir + '/boot/efi')
mock_efi_bl.assert_called_once_with(self.fake_dir + '/boot/efi')
mock_execute.assert_has_calls(expected)
self.assertEqual(5, mock_execute.call_count)
mock_rescan.assert_called_once_with(self.fake_dev)
@mock.patch.object(os.path, 'exists', lambda *_: False)
@mock.patch.object(hardware, 'is_md_device', autospec=True)
@mock.patch.object(efi_utils, '_get_efi_bootloaders', autospec=True)
@mock.patch.object(os, 'makedirs', autospec=True)
def test_found_csv(self, mkdir_mock, mock_efi_bl, mock_is_md_device,
mock_utils_efi_part, mock_get_part_path,
mock_get_part_uuid, mock_execute, mock_rescan):
mock_utils_efi_part.return_value = {'number': '1'}
mock_get_part_path.return_value = self.fake_efi_system_part
mock_efi_bl.return_value = ['EFI/vendor/BOOTX64.CSV']
mock_is_md_device.return_value = False
# Format is <file>,<entry_name>,<options>,humanfriendlytextnotused
# https://www.rodsbooks.com/efi-bootloaders/fallback.html
# Mild difference, Ubuntu ships a file without a 0xFEFF delimiter
# at the start of the file, where as Red Hat *does*
csv_file_data = u'shimx64.efi,Vendor String,,Grub2MadeUSDoThis\n'
# This test also handles deleting a pre-existing matching vendor
# string in advance. This string also includes a UTF16 character
# *on* purpose, to force proper decoding to be tested and garbage
# characters which can be found in OVMF test VM NVRAM records.
dupe_entry = """
BootCurrent: 0001
Timeout: 0 seconds
BootOrder: 0000,00001
Boot0000 UTF16ÿ HD(1,GPT,4f3c6294-bf9b-4208-9808-be45dfc34b5c)File(\EFI\Boot\BOOTX64.EFI)
Boot0001* Vendor String HD(1,GPT,4f3c6294-bf9b-4208-9808-be45dfc34b5c)File(\EFI\Boot\BOOTX64.EFI)
Boot0002 Vendor String HD(2,GPT,4f3c6294-bf9b-4208-9808-be45dfc34b5c)File(\EFI\Boot\BOOTX64.EFI)
Boot0003: VENDMAGIC FvFile(9f3c6294-bf9b-4208-9808-be45dfc34b51)N.....YM....R,Y.
""" # noqa This is a giant literal string for testing.
dupe_entry = dupe_entry.encode('utf-16')
mock_execute.side_effect = iter([('', ''),
(dupe_entry, ''),
('', ''), ('', ''),
('', ''), ('', ''),
('', '')])
expected = [mock.call('mount', self.fake_efi_system_part,
self.fake_dir + '/boot/efi'),
mock.call('efibootmgr', '-v', binary=True),
mock.call('efibootmgr', '-b', '0001', '-B', binary=True),
mock.call('efibootmgr', '-b', '0002', '-B', binary=True),
mock.call('efibootmgr', '-v', '-c', '-d', self.fake_dev,
'-p', '1', '-w',
'-L', 'Vendor String', '-l',
'\\EFI\\vendor\\shimx64.efi', binary=True),
mock.call('umount', self.fake_dir + '/boot/efi',
attempts=3, delay_on_retry=True),
mock.call('sync')]
with mock.patch('builtins.open',
mock.mock_open(read_data=csv_file_data)):
result = efi_utils.manage_uefi(self.fake_dev, self.fake_root_uuid)
self.assertTrue(result)
mkdir_mock.assert_called_once_with(self.fake_dir + '/boot/efi')
mock_efi_bl.assert_called_once_with(self.fake_dir + '/boot/efi')
mock_execute.assert_has_calls(expected)
@mock.patch.object(os.path, 'exists', lambda *_: False)
@mock.patch.object(hardware, 'is_md_device', autospec=True)
@mock.patch.object(efi_utils, '_get_efi_bootloaders', autospec=True)
@mock.patch.object(os, 'makedirs', autospec=True)
def test_nvme_device(self, mkdir_mock, mock_efi_bl, mock_is_md_device,
mock_utils_efi_part, mock_get_part_path,
mock_get_part_uuid, mock_execute, mock_rescan):
mock_utils_efi_part.return_value = None
mock_get_part_uuid.return_value = '/dev/fakenvme0p1'
mock_is_md_device.return_value = False
mock_efi_bl.return_value = ['EFI/BOOT/BOOTX64.EFI']
mock_execute.side_effect = iter([('', ''), (EFI_RESULT, ''),
(EFI_RESULT, ''), ('', ''),
('', ''), ('', ''),
('', '')])
expected = [mock.call('mount', '/dev/fakenvme0p1',
self.fake_dir + '/boot/efi'),
mock.call('efibootmgr', '-v', binary=True),
mock.call('efibootmgr', '-v', '-c', '-d', '/dev/fakenvme0',
'-p', '1', '-w',
'-L', 'ironic1', '-l',
'\\EFI\\BOOT\\BOOTX64.EFI', binary=True),
mock.call('umount', self.fake_dir + '/boot/efi',
attempts=3, delay_on_retry=True),
mock.call('sync')]
result = efi_utils.manage_uefi('/dev/fakenvme0', self.fake_root_uuid)
self.assertTrue(result)
mkdir_mock.assert_called_once_with(self.fake_dir + '/boot/efi')
mock_efi_bl.assert_called_once_with(self.fake_dir + '/boot/efi')
mock_execute.assert_has_calls(expected)
@mock.patch.object(os.path, 'exists', lambda *_: False)
@mock.patch.object(hardware, 'is_md_device', autospec=True)
@mock.patch.object(efi_utils, '_get_efi_bootloaders', autospec=True)
@mock.patch.object(os, 'makedirs', autospec=True)
def test_wholedisk(self, mkdir_mock, mock_efi_bl, mock_is_md_device,
mock_utils_efi_part, mock_get_part_path,
mock_get_part_uuid, mock_execute, mock_rescan):
mock_utils_efi_part.return_value = {'number': '1'}
mock_get_part_path.return_value = self.fake_efi_system_part
mock_is_md_device.return_value = False
mock_efi_bl.return_value = ['EFI/BOOT/BOOTX64.EFI']
mock_execute.side_effect = iter([('', ''), (EFI_RESULT, ''),
(EFI_RESULT, ''), ('', ''),
('', ''), ('', ''),
('', '')])
expected = [mock.call('mount', self.fake_efi_system_part,
self.fake_dir + '/boot/efi'),
mock.call('efibootmgr', '-v', binary=True),
mock.call('efibootmgr', '-v', '-c', '-d', self.fake_dev,
'-p', '1', '-w',
'-L', 'ironic1', '-l',
'\\EFI\\BOOT\\BOOTX64.EFI', binary=True),
mock.call('umount', self.fake_dir + '/boot/efi',
attempts=3, delay_on_retry=True),
mock.call('sync')]
result = efi_utils.manage_uefi(self.fake_dev, None)
self.assertTrue(result)
mkdir_mock.assert_called_once_with(self.fake_dir + '/boot/efi')
mock_efi_bl.assert_called_once_with(self.fake_dir + '/boot/efi')
mock_execute.assert_has_calls(expected)
mock_get_part_uuid.assert_not_called()
@mock.patch.object(os.path, 'exists', lambda *_: False)
@mock.patch.object(hardware, 'get_component_devices', autospec=True)
@mock.patch.object(raid_utils,
'prepare_boot_partitions_for_softraid',
autospec=True)
@mock.patch.object(hardware, 'get_holder_disks', autospec=True)
@mock.patch.object(hardware, 'is_md_device', autospec=True)
@mock.patch.object(efi_utils, '_get_efi_bootloaders', autospec=True)
@mock.patch.object(os, 'makedirs', autospec=True)
def test_software_raid(self, mkdir_mock, mock_efi_bl, mock_is_md_device,
mock_get_holder_disks, mock_prepare,
mock_get_component_devices,
mock_utils_efi_part, mock_get_part_path,
mock_get_part_uuid, mock_execute, mock_rescan):
mock_utils_efi_part.return_value = {'number': '1'}
mock_get_part_path.return_value = self.fake_efi_system_part
mock_is_md_device.return_value = True
mock_get_holder_disks.return_value = ['/dev/sda', '/dev/sdb']
mock_prepare.return_value = '/dev/md125'
mock_get_component_devices.return_value = ['/dev/sda3', '/dev/sdb3']
mock_efi_bl.return_value = ['EFI/BOOT/BOOTX64.EFI']
mock_execute.side_effect = iter([('', ''),
('', ''),
('', ''),
(EFI_RESULT, ''),
(EFI_RESULT, ''),
(EFI_RESULT, ''),
(EFI_RESULT, ''),
('', ''),
('', '')])
expected = [mock.call('mount', self.fake_efi_system_part,
self.fake_dir + '/boot/efi'),
mock.call('umount', self.fake_dir + '/boot/efi',
attempts=3, delay_on_retry=True),
mock.call('mount', self.fake_efi_system_part,
self.fake_dir + '/boot/efi'),
mock.call('efibootmgr', '-v', binary=True),
mock.call('efibootmgr', '-v', '-c', '-d', '/dev/sda3',
'-p', '3', '-w', '-L', 'ironic1 (RAID, part0)',
'-l', '\\EFI\\BOOT\\BOOTX64.EFI', binary=True),
mock.call('efibootmgr', '-v', binary=True),
mock.call('efibootmgr', '-v', '-c', '-d', '/dev/sdb3',
'-p', '3', '-w', '-L', 'ironic1 (RAID, part1)',
'-l', '\\EFI\\BOOT\\BOOTX64.EFI', binary=True),
mock.call('umount', self.fake_dir + '/boot/efi',
attempts=3, delay_on_retry=True),
mock.call('sync')]
result = efi_utils.manage_uefi(self.fake_dev, None)
self.assertTrue(result)
mkdir_mock.assert_called_once_with(self.fake_dir + '/boot/efi')
mock_efi_bl.assert_called_once_with(self.fake_dir + '/boot/efi')
mock_execute.assert_has_calls(expected)
@mock.patch.object(os.path, 'exists', lambda *_: False)
@mock.patch.object(hardware, 'is_md_device', autospec=True)
@mock.patch.object(efi_utils, '_get_efi_bootloaders', autospec=True)
@mock.patch.object(os, 'makedirs', autospec=True)
def test_failure(self, mkdir_mock, mock_efi_bl, mock_is_md_device,
mock_utils_efi_part, mock_get_part_path,
mock_get_part_uuid, mock_execute, mock_rescan):
mock_utils_efi_part.return_value = {'number': '1'}
mock_get_part_path.return_value = self.fake_efi_system_part
mock_is_md_device.return_value = False
mock_efi_bl.return_value = ['EFI/BOOT/BOOTX64.EFI']
mock_execute.side_effect = processutils.ProcessExecutionError('boom')
self.assertRaisesRegex(errors.CommandExecutionError, 'boom',
efi_utils.manage_uefi,
self.fake_dev, self.fake_root_uuid)
mkdir_mock.assert_called_once_with(self.fake_dir + '/boot/efi')
mock_efi_bl.assert_not_called()
mock_execute.assert_called_once_with(
'mount', self.fake_efi_system_part, self.fake_dir + '/boot/efi')
mock_rescan.assert_called_once_with(self.fake_dev)
@mock.patch.object(os.path, 'exists', lambda *_: False)
@mock.patch.object(hardware, 'is_md_device', autospec=True)
@mock.patch.object(efi_utils, '_get_efi_bootloaders', autospec=True)
@mock.patch.object(os, 'makedirs', autospec=True)
def test_failure_after_mount(self, mkdir_mock, mock_efi_bl,
mock_is_md_device, mock_utils_efi_part,
mock_get_part_path, mock_get_part_uuid,
mock_execute, mock_rescan):
mock_utils_efi_part.return_value = {'number': '1'}
mock_get_part_path.return_value = self.fake_efi_system_part
mock_is_md_device.return_value = False
mock_efi_bl.return_value = ['EFI/BOOT/BOOTX64.EFI']
mock_execute.side_effect = [
('', ''),
processutils.ProcessExecutionError('boom'),
('', ''),
('', ''),
]
expected = [mock.call('mount', self.fake_efi_system_part,
self.fake_dir + '/boot/efi'),
mock.call('efibootmgr', '-v', binary=True),
mock.call('umount', self.fake_dir + '/boot/efi',
attempts=3, delay_on_retry=True),
mock.call('sync')]
self.assertRaisesRegex(errors.CommandExecutionError, 'boom',
efi_utils.manage_uefi,
self.fake_dev, self.fake_root_uuid)
mkdir_mock.assert_called_once_with(self.fake_dir + '/boot/efi')
mock_efi_bl.assert_called_once_with(self.fake_dir + '/boot/efi')
mock_execute.assert_has_calls(expected)
self.assertEqual(4, mock_execute.call_count)
mock_rescan.assert_called_once_with(self.fake_dev)
@mock.patch.object(os.path, 'exists', lambda *_: False)
@mock.patch.object(hardware, 'is_md_device', autospec=True)
@mock.patch.object(efi_utils, '_get_efi_bootloaders', autospec=True)
@mock.patch.object(os, 'makedirs', autospec=True)
def test_failure_after_failure(self, mkdir_mock, mock_efi_bl,
mock_is_md_device, mock_utils_efi_part,
mock_get_part_path, mock_get_part_uuid,
mock_execute, mock_rescan):
mock_utils_efi_part.return_value = {'number': '1'}
mock_get_part_path.return_value = self.fake_efi_system_part
mock_is_md_device.return_value = False
mock_efi_bl.return_value = ['EFI/BOOT/BOOTX64.EFI']
mock_execute.side_effect = [
('', ''),
processutils.ProcessExecutionError('boom'),
processutils.ProcessExecutionError('no umount'),
('', ''),
]
expected = [mock.call('mount', self.fake_efi_system_part,
self.fake_dir + '/boot/efi'),
mock.call('efibootmgr', '-v', binary=True),
mock.call('umount', self.fake_dir + '/boot/efi',
attempts=3, delay_on_retry=True)]
self.assertRaisesRegex(errors.CommandExecutionError, 'boom',
efi_utils.manage_uefi,
self.fake_dev, self.fake_root_uuid)
mkdir_mock.assert_called_once_with(self.fake_dir + '/boot/efi')
mock_efi_bl.assert_called_once_with(self.fake_dir + '/boot/efi')
mock_execute.assert_has_calls(expected)
self.assertEqual(3, mock_execute.call_count)
mock_rescan.assert_called_once_with(self.fake_dev)
@mock.patch.object(partition_utils, 'get_partition', autospec=True)
@mock.patch.object(utils, 'execute', autospec=True)
class TestGetPartitionPathByNumber(base.IronicAgentTest):
def test_ok(self, mock_execute, mock_get_partition):
mock_execute.return_value = (hardware_samples.SGDISK_INFO_TEMPLATE, '')
mock_get_partition.return_value = '/dev/fake1'
result = efi_utils.get_partition_path_by_number('/dev/fake', 1)
self.assertEqual('/dev/fake1', result)
mock_execute.assert_called_once_with('sgdisk', '-i', '1', '/dev/fake',
use_standard_locale=True)
def test_broken(self, mock_execute, mock_get_partition):
mock_execute.return_value = ('I am a teaport', '')
self.assertIsNone(
efi_utils.get_partition_path_by_number('/dev/fake', 1))
mock_get_partition.assert_not_called()