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# 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
from unittest import mock
from nova import exception
from nova import filesystem
from nova import test
class TestFSCommon(test.NoDBTestCase):
def test_read_sys(self):
open_mock = mock.mock_open(read_data='bar')
with mock.patch('builtins.open', open_mock) as m_open:
self.assertEqual('bar', filesystem.read_sys('foo'))
expected_path = os.path.join(filesystem.SYS, 'foo')
m_open.assert_called_once_with(expected_path, mode='r')
def test_read_sys_error(self):
with mock.patch('builtins.open',
side_effect=OSError('error')) as m_open:
self.assertRaises(exception.FileNotFound,
filesystem.read_sys, 'foo')
expected_path = os.path.join(filesystem.SYS, 'foo')
m_open.assert_called_once_with(expected_path, mode='r')
def test_write_sys(self):
open_mock = mock.mock_open()
with mock.patch('builtins.open', open_mock) as m_open:
self.assertIsNone(filesystem.write_sys('foo', 'bar'))
expected_path = os.path.join(filesystem.SYS, 'foo')
m_open.assert_called_once_with(expected_path, mode='w')
open_mock().write.assert_called_once_with('bar')
def test_write_sys_error(self):
with mock.patch('builtins.open',
side_effect=OSError('fake_error')) as m_open:
self.assertRaises(exception.FileNotFound,
filesystem.write_sys, 'foo', 'bar')
expected_path = os.path.join(filesystem.SYS, 'foo')
m_open.assert_called_once_with(expected_path, mode='w')
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