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# Copyright 2015 Cloudbase Solutions SRL
#
# All Rights Reserved.
#
# 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.
"""
Unit tests for the os_win._utils module.
"""
from unittest import mock
import ddt
from os_win import _utils
from os_win import constants
from os_win import exceptions
from os_win.tests.unit import test_base
@ddt.ddt
class UtilsTestCase(test_base.BaseTestCase):
@mock.patch('oslo_concurrency.processutils.execute')
def test_execute(self, mock_execute):
_utils.execute(mock.sentinel.cmd, kwarg=mock.sentinel.kwarg)
mock_execute.assert_called_once_with(mock.sentinel.cmd,
kwarg=mock.sentinel.kwarg)
def test_parse_server_string(self):
result = _utils.parse_server_string('::1')
self.assertEqual(('::1', ''), result)
result = _utils.parse_server_string('[::1]:8773')
self.assertEqual(('::1', '8773'), result)
result = _utils.parse_server_string('2001:db8::192.168.1.1')
self.assertEqual(('2001:db8::192.168.1.1', ''), result)
result = _utils.parse_server_string('[2001:db8::192.168.1.1]:8773')
self.assertEqual(('2001:db8::192.168.1.1', '8773'), result)
result = _utils.parse_server_string('192.168.1.1')
self.assertEqual(('192.168.1.1', ''), result)
result = _utils.parse_server_string('192.168.1.2:8773')
self.assertEqual(('192.168.1.2', '8773'), result)
result = _utils.parse_server_string('192.168.1.3')
self.assertEqual(('192.168.1.3', ''), result)
result = _utils.parse_server_string('www.example.com:8443')
self.assertEqual(('www.example.com', '8443'), result)
result = _utils.parse_server_string('www.example.com')
self.assertEqual(('www.example.com', ''), result)
# error case
result = _utils.parse_server_string('www.exa:mple.com:8443')
self.assertEqual(('', ''), result)
result = _utils.parse_server_string('')
self.assertEqual(('', ''), result)
def _get_fake_func_with_retry_decorator(self, side_effect,
decorator=_utils.retry_decorator,
*args, **kwargs):
func_side_effect = mock.Mock(side_effect=side_effect)
@decorator(*args, **kwargs)
def fake_func(*_args, **_kwargs):
return func_side_effect(*_args, **_kwargs)
return fake_func, func_side_effect
@mock.patch.object(_utils, 'time')
def test_retry_decorator(self, mock_time):
err_code = 1
max_retry_count = 5
max_sleep_time = 2
timeout = max_retry_count + 1
mock_time.time.side_effect = range(timeout)
raised_exc = exceptions.Win32Exception(message='fake_exc',
error_code=err_code)
side_effect = [raised_exc] * max_retry_count
side_effect.append(mock.sentinel.ret_val)
(fake_func,
fake_func_side_effect) = self._get_fake_func_with_retry_decorator(
error_codes=err_code,
exceptions=exceptions.Win32Exception,
max_retry_count=max_retry_count,
max_sleep_time=max_sleep_time,
timeout=timeout,
side_effect=side_effect)
ret_val = fake_func(mock.sentinel.arg,
kwarg=mock.sentinel.kwarg)
self.assertEqual(mock.sentinel.ret_val, ret_val)
fake_func_side_effect.assert_has_calls(
[mock.call(mock.sentinel.arg, kwarg=mock.sentinel.kwarg)] *
(max_retry_count + 1))
self.assertEqual(max_retry_count + 1, mock_time.time.call_count)
mock_time.sleep.assert_has_calls(
[mock.call(sleep_time)
for sleep_time in [1, 2, 2, 2, 1]])
@mock.patch.object(_utils, 'time')
def _test_retry_decorator_exceeded(self, mock_time, expected_try_count,
mock_time_side_eff=None,
timeout=None, max_retry_count=None):
raised_exc = exceptions.Win32Exception(message='fake_exc')
mock_time.time.side_effect = mock_time_side_eff
(fake_func,
fake_func_side_effect) = self._get_fake_func_with_retry_decorator(
exceptions=exceptions.Win32Exception,
timeout=timeout,
side_effect=raised_exc)
self.assertRaises(exceptions.Win32Exception, fake_func)
fake_func_side_effect.assert_has_calls(
[mock.call()] * expected_try_count)
def test_retry_decorator_tries_exceeded(self):
self._test_retry_decorator_exceeded(
max_retry_count=2,
expected_try_count=3)
def test_retry_decorator_time_exceeded(self):
self._test_retry_decorator_exceeded(
mock_time_side_eff=[0, 1, 4],
timeout=3,
expected_try_count=1)
@mock.patch('time.sleep')
def _test_retry_decorator_no_retry(self, mock_sleep,
expected_exceptions=(),
expected_error_codes=()):
err_code = 1
raised_exc = exceptions.Win32Exception(message='fake_exc',
error_code=err_code)
fake_func, fake_func_side_effect = (
self._get_fake_func_with_retry_decorator(
error_codes=expected_error_codes,
exceptions=expected_exceptions,
side_effect=raised_exc))
self.assertRaises(exceptions.Win32Exception,
fake_func, mock.sentinel.arg,
fake_kwarg=mock.sentinel.kwarg)
self.assertFalse(mock_sleep.called)
fake_func_side_effect.assert_called_once_with(
mock.sentinel.arg, fake_kwarg=mock.sentinel.kwarg)
def test_retry_decorator_unexpected_err_code(self):
self._test_retry_decorator_no_retry(
expected_exceptions=exceptions.Win32Exception,
expected_error_codes=2)
def test_retry_decorator_unexpected_exc(self):
self._test_retry_decorator_no_retry(
expected_exceptions=(IOError, AttributeError))
@mock.patch('time.sleep')
def test_retry_decorator_explicitly_avoid_retry(self, mock_sleep):
# Tests the case when there is a function aware of the retry
# decorator and explicitly requests that no retry should be
# performed.
def func_side_effect(fake_arg, retry_context):
self.assertEqual(mock.sentinel.arg, fake_arg)
self.assertEqual(retry_context, dict(prevent_retry=False))
retry_context['prevent_retry'] = True
raise exceptions.Win32Exception(message='fake_exc',
error_code=1)
fake_func, mock_side_effect = (
self._get_fake_func_with_retry_decorator(
exceptions=exceptions.Win32Exception,
side_effect=func_side_effect,
pass_retry_context=True))
self.assertRaises(exceptions.Win32Exception,
fake_func, mock.sentinel.arg)
self.assertEqual(1, mock_side_effect.call_count)
self.assertFalse(mock_sleep.called)
@mock.patch.object(_utils.socket, 'getaddrinfo')
def test_get_ips(self, mock_getaddrinfo):
ips = ['1.2.3.4', '5.6.7.8']
mock_getaddrinfo.return_value = [
(None, None, None, None, (ip, 0)) for ip in ips]
resulted_ips = _utils.get_ips(mock.sentinel.addr)
self.assertEqual(ips, resulted_ips)
mock_getaddrinfo.assert_called_once_with(
mock.sentinel.addr, None, 0, 0, 0)
@mock.patch('eventlet.tpool.execute')
@mock.patch('eventlet.getcurrent')
@ddt.data(mock.Mock(), None)
def test_avoid_blocking_call(self, gt_parent, mock_get_current_gt,
mock_execute):
mock_get_current_gt.return_value.parent = gt_parent
mock_execute.return_value = mock.sentinel.ret_val
def fake_blocking_func(*args, **kwargs):
self.assertEqual((mock.sentinel.arg, ), args)
self.assertEqual(dict(kwarg=mock.sentinel.kwarg),
kwargs)
return mock.sentinel.ret_val
fake_blocking_func_decorated = (
_utils.avoid_blocking_call_decorator(fake_blocking_func))
ret_val = fake_blocking_func_decorated(mock.sentinel.arg,
kwarg=mock.sentinel.kwarg)
self.assertEqual(mock.sentinel.ret_val, ret_val)
if gt_parent:
mock_execute.assert_called_once_with(fake_blocking_func,
mock.sentinel.arg,
kwarg=mock.sentinel.kwarg)
else:
self.assertFalse(mock_execute.called)
@mock.patch.object(_utils, 'time')
@ddt.data(True, False)
def test_wmi_retry_decorator(self, expect_hres, mock_time):
expected_hres = 0x8007beef
expected_err_code = expected_hres if expect_hres else 0xbeef
other_hres = 0x80070001
max_retry_count = 5
# The second exception will contain an unexpected error code,
# in which case we expect the function to propagate the error.
expected_try_count = 2
side_effect = [test_base.FakeWMIExc(hresult=expected_hres),
test_base.FakeWMIExc(hresult=other_hres)]
decorator = (_utils.wmi_retry_decorator_hresult if expect_hres
else _utils.wmi_retry_decorator)
(fake_func,
fake_func_side_effect) = self._get_fake_func_with_retry_decorator(
error_codes=expected_err_code,
max_retry_count=max_retry_count,
decorator=decorator,
side_effect=side_effect)
self.assertRaises(test_base.FakeWMIExc,
fake_func,
mock.sentinel.arg,
kwarg=mock.sentinel.kwarg)
fake_func_side_effect.assert_has_calls(
[mock.call(mock.sentinel.arg, kwarg=mock.sentinel.kwarg)] *
expected_try_count)
def test_get_com_error_hresult(self):
fake_hres = -5
expected_hres = (1 << 32) + fake_hres
mock_excepinfo = [None] * 5 + [fake_hres]
mock_com_err = mock.Mock(excepinfo=mock_excepinfo)
ret_val = _utils.get_com_error_hresult(mock_com_err)
self.assertEqual(expected_hres, ret_val)
def get_com_error_hresult_missing_excepinfo(self):
ret_val = _utils.get_com_error_hresult(None)
self.assertIsNone(ret_val)
def test_hresult_to_err_code(self):
# This could differ based on the error source.
# Only the last 2 bytes of the hresult the error code.
fake_file_exists_hres = -0x7ff8ffb0
file_exists_err_code = 0x50
ret_val = _utils.hresult_to_err_code(fake_file_exists_hres)
self.assertEqual(file_exists_err_code, ret_val)
@mock.patch.object(_utils, 'get_com_error_hresult')
@mock.patch.object(_utils, 'hresult_to_err_code')
def test_get_com_error_code(self, mock_hres_to_err_code, mock_get_hresult):
ret_val = _utils.get_com_error_code(mock.sentinel.com_err)
self.assertEqual(mock_hres_to_err_code.return_value, ret_val)
mock_get_hresult.assert_called_once_with(mock.sentinel.com_err)
mock_hres_to_err_code.assert_called_once_with(
mock_get_hresult.return_value)
@ddt.data(_utils._WBEM_E_NOT_FOUND, mock.sentinel.wbem_error)
def test_is_not_found_exc(self, hresult):
exc = test_base.FakeWMIExc(hresult=hresult)
result = _utils._is_not_found_exc(exc)
expected = hresult == _utils._WBEM_E_NOT_FOUND
self.assertEqual(expected, result)
@mock.patch.object(_utils, 'get_com_error_hresult')
def test_not_found_decorator(self, mock_get_com_error_hresult):
mock_get_com_error_hresult.side_effect = lambda x: x
translated_exc = exceptions.HyperVVMNotFoundException
@_utils.not_found_decorator(
translated_exc=translated_exc)
def f(to_call):
to_call()
to_call = mock.Mock()
to_call.side_effect = exceptions.x_wmi(
'expected error', com_error=_utils._WBEM_E_NOT_FOUND)
self.assertRaises(translated_exc, f, to_call)
to_call.side_effect = exceptions.x_wmi()
self.assertRaises(exceptions.x_wmi, f, to_call)
def test_hex_str_to_byte_array(self):
fake_hex_str = '0x0010A'
resulted_array = _utils.hex_str_to_byte_array(fake_hex_str)
expected_array = bytearray([0, 1, 10])
self.assertEqual(expected_array, resulted_array)
def test_byte_array_to_hex_str(self):
fake_byte_array = bytearray(range(3))
resulted_string = _utils.byte_array_to_hex_str(fake_byte_array)
expected_string = '000102'
self.assertEqual(expected_string, resulted_string)
def test_required_vm_version(self):
@_utils.required_vm_version()
def foo(bar, vmsettings):
pass
mock_vmsettings = mock.Mock()
for good_version in [constants.VM_VERSION_5_0,
constants.VM_VERSION_254_0]:
mock_vmsettings.Version = good_version
foo(mock.sentinel.bar, mock_vmsettings)
for bad_version in ['4.99', '254.1']:
mock_vmsettings.Version = bad_version
self.assertRaises(exceptions.InvalidVMVersion, foo,
mock.sentinel.bar, mock_vmsettings)
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