140 lines
5.6 KiB
Python
140 lines
5.6 KiB
Python
# Copyright 2011 Justin Santa Barbara
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import errno
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import mock
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import os
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import nova.privsep.utils
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from nova import test
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from nova.tests import fixtures
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class SupportDirectIOTestCase(test.NoDBTestCase):
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def setUp(self):
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super(SupportDirectIOTestCase, self).setUp()
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# O_DIRECT is not supported on all Python runtimes, so on platforms
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# where it's not supported (e.g. Mac), we can still test the code-path
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# by stubbing out the value.
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if not hasattr(os, 'O_DIRECT'):
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# `mock` seems to have trouble stubbing an attr that doesn't
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# originally exist, so falling back to stubbing out the attribute
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# directly.
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os.O_DIRECT = 16384
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self.addCleanup(delattr, os, 'O_DIRECT')
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self.einval = OSError()
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self.einval.errno = errno.EINVAL
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self.enoent = OSError()
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self.enoent.errno = errno.ENOENT
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self.test_path = os.path.join('.', '.directio.test.123')
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self.io_flags = os.O_CREAT | os.O_WRONLY | os.O_DIRECT
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open_patcher = mock.patch('os.open')
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write_patcher = mock.patch('os.write')
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close_patcher = mock.patch('os.close')
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unlink_patcher = mock.patch('os.unlink')
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random_string_patcher = mock.patch(
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'nova.privsep.utils.generate_random_string', return_value='123')
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self.addCleanup(open_patcher.stop)
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self.addCleanup(write_patcher.stop)
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self.addCleanup(close_patcher.stop)
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self.addCleanup(unlink_patcher.stop)
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self.addCleanup(random_string_patcher.stop)
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self.mock_open = open_patcher.start()
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self.mock_write = write_patcher.start()
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self.mock_close = close_patcher.start()
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self.mock_unlink = unlink_patcher.start()
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random_string_patcher.start()
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def test_supports_direct_io(self):
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self.mock_open.return_value = 3
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self.assertTrue(nova.privsep.utils.supports_direct_io('.'))
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self.mock_open.assert_called_once_with(self.test_path, self.io_flags)
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self.mock_write.assert_called_once_with(3, mock.ANY)
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# ensure unlink(filepath) will actually remove the file by deleting
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# the remaining link to it in close(fd)
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self.mock_close.assert_called_once_with(3)
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self.mock_unlink.assert_called_once_with(self.test_path)
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def test_supports_direct_io_with_exception_in_write(self):
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self.mock_open.return_value = 3
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self.mock_write.side_effect = ValueError()
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self.assertRaises(ValueError, nova.privsep.utils.supports_direct_io,
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'.')
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self.mock_open.assert_called_once_with(self.test_path, self.io_flags)
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self.mock_write.assert_called_once_with(3, mock.ANY)
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# ensure unlink(filepath) will actually remove the file by deleting
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# the remaining link to it in close(fd)
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self.mock_close.assert_called_once_with(3)
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self.mock_unlink.assert_called_once_with(self.test_path)
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def test_supports_direct_io_with_exception_in_open(self):
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self.mock_open.side_effect = ValueError()
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self.assertRaises(ValueError, nova.privsep.utils.supports_direct_io,
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'.')
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self.mock_open.assert_called_once_with(self.test_path, self.io_flags)
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self.mock_write.assert_not_called()
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self.mock_close.assert_not_called()
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self.mock_unlink.assert_called_once_with(self.test_path)
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def test_supports_direct_io_with_oserror_in_write(self):
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self.mock_open.return_value = 3
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self.mock_write.side_effect = self.einval
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self.assertFalse(nova.privsep.utils.supports_direct_io('.'))
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self.mock_open.assert_called_once_with(self.test_path, self.io_flags)
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self.mock_write.assert_called_once_with(3, mock.ANY)
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# ensure unlink(filepath) will actually remove the file by deleting
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# the remaining link to it in close(fd)
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self.mock_close.assert_called_once_with(3)
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self.mock_unlink.assert_called_once_with(self.test_path)
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def test_supports_direct_io_with_oserror_in_open_einval(self):
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self.mock_open.side_effect = self.einval
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self.assertFalse(nova.privsep.utils.supports_direct_io('.'))
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self.mock_open.assert_called_once_with(self.test_path, self.io_flags)
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self.mock_write.assert_not_called()
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self.mock_close.assert_not_called()
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self.mock_unlink.assert_called_once_with(self.test_path)
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def test_supports_direct_io_with_oserror_in_open_enoent(self):
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self.mock_open.side_effect = self.enoent
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self.assertFalse(nova.privsep.utils.supports_direct_io('.'))
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self.mock_open.assert_called_once_with(self.test_path, self.io_flags)
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self.mock_write.assert_not_called()
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self.mock_close.assert_not_called()
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self.mock_unlink.assert_called_once_with(self.test_path)
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class UtilsTestCase(test.NoDBTestCase):
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def setUp(self):
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super(UtilsTestCase, self).setUp()
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self.useFixture(fixtures.PrivsepFixture())
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@mock.patch('os.kill')
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def test_kill(self, mock_kill):
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nova.privsep.utils.kill(42, -9)
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mock_kill.assert_called_with(42, -9)
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