Merge "Fix issue with double mocking of utils.execute functions"
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commit
e539101015
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@ -32,7 +32,6 @@ eventlet.monkey_patch(os=False)
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import fixtures # noqa for I202 due to 'import eventlet' above
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from ironic_lib import utils
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import mock
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from oslo_concurrency import processutils
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from oslo_config import fixture as config_fixture
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from oslo_log import log as logging
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@ -103,22 +102,21 @@ class TestCase(oslo_test_base.BaseTestCase):
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for factory in driver_factory._INTERFACE_LOADERS.values():
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factory._extension_manager = None
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# Block access to utils.execute() and related functions.
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# NOTE(bigjools): Not using a decorator on tests because I don't
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# want to force every test method to accept a new arg. Instead, they
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# can override or examine this self._exec_patch Mock as needed.
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# Ban running external processes via 'execute' like functions. If the
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# patched function is called, an exception is raised to warn the
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# tester.
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if self.block_execute:
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self._exec_patch = mock.Mock()
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self._exec_patch.side_effect = Exception(
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"Don't call ironic_lib.utils.execute() / "
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"processutils.execute() or similar functions in tests!")
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self.patch(processutils, 'execute', self._exec_patch)
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self.patch(subprocess, 'Popen', self._exec_patch)
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self.patch(subprocess, 'call', self._exec_patch)
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self.patch(subprocess, 'check_call', self._exec_patch)
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self.patch(subprocess, 'check_output', self._exec_patch)
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self.patch(utils, 'execute', self._exec_patch)
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# NOTE(jlvillal): Intentionally not using mock as if you mock a
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# mock it causes things to not work correctly. As doing an
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# autospec=True causes strangeness. By using a simple function we
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# can then mock it without issue.
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self.patch(processutils, 'execute', do_not_call)
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self.patch(subprocess, 'call', do_not_call)
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self.patch(subprocess, 'check_call', do_not_call)
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self.patch(subprocess, 'check_output', do_not_call)
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self.patch(utils, 'execute', do_not_call)
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# subprocess.Popen is a class
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self.patch(subprocess, 'Popen', DoNotCallPopen)
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def _set_config(self):
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self.cfg_fixture = self.useFixture(config_fixture.Config(CONF))
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@ -201,3 +199,35 @@ class TestCase(oslo_test_base.BaseTestCase):
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self.assertEqual(event_type, notif_args['event_type'].
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to_event_type_field())
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self.assertEqual(level, notif_args['level'])
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def do_not_call(*args, **kwargs):
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"""Helper function to raise an exception if it is called"""
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raise Exception(
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"Don't call ironic_lib.utils.execute() / "
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"processutils.execute() or similar functions in tests!")
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class DoNotCallPopen(object):
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"""Helper class to mimic subprocess.popen()
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It's job is to raise an exception if it is called. We create stub functions
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so mocks that use autospec=True will work.
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"""
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def __init__(self, *args, **kwargs):
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do_not_call(*args, **kwargs)
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def communicate(input=None):
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pass
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def kill():
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pass
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def poll():
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pass
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def terminate():
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pass
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def wait():
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pass
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@ -557,7 +557,7 @@ class ConsoleUtilsTestCase(db_base.DbTestCase):
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mock_stop.assert_called_once_with(self.info['uuid'])
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mock_dir_exists.assert_called_once_with()
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mock_popen.assert_not_called()
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self.assertEqual(0, mock_popen.call_count)
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@mock.patch.object(console_utils, '_stop_console', autospec=True)
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def test_stop_socat_console(self, mock_stop):
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@ -0,0 +1,87 @@
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import subprocess
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from ironic_lib import utils
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import mock
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from oslo_concurrency import processutils
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from ironic.tests import base
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class BlockExecuteTestCase(base.TestCase):
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"""Test to ensure we block access to the 'execute' type functions"""
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def test_exception_raised_for_execute(self):
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execute_functions = (processutils.execute, subprocess.Popen,
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subprocess.call, subprocess.check_call,
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subprocess.check_output, utils.execute)
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for function_name in execute_functions:
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exc = self.assertRaises(
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Exception,
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function_name,
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["echo", "%s" % function_name]) # noqa
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# Have to use 'noqa' as we are raising plain Exception and we will
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# get H202 error in 'pep8' check.
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self.assertEqual(
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"Don't call ironic_lib.utils.execute() / "
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"processutils.execute() or similar functions in tests!",
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"%s" % exc)
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@mock.patch.object(utils, "execute", autospec=True)
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def test_can_mock_execute(self, mock_exec):
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# NOTE(jlvillal): We had discovered an issue where mocking wasn't
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# working because we had used a mock to block access to the execute
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# functions. This caused us to "mock a mock" and didn't work correctly.
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# We want to make sure that we can mock our execute functions even with
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# our "block execute" code.
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utils.execute("ls")
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utils.execute("echo")
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self.assertEqual(2, mock_exec.call_count)
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@mock.patch.object(processutils, "execute", autospec=True)
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def test_exception_raised_for_execute_parent_mocked(self, mock_exec):
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# Make sure that even if we mock the parent execute function, that we
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# still get an exception for a child. So in this case
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# ironic_lib.utils.execute() calls processutils.execute(). Make sure an
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# exception is raised even though we mocked processutils.execute()
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exc = self.assertRaises(
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Exception,
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utils.execute,
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"ls") # noqa
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# Have to use 'noqa' as we are raising plain Exception and we will get
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# H202 error in 'pep8' check.
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self.assertEqual(
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"Don't call ironic_lib.utils.execute() / "
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"processutils.execute() or similar functions in tests!",
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"%s" % exc)
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class DontBlockExecuteTestCase(base.TestCase):
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"""Ensure we can turn off blocking access to 'execute' type functions"""
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# Don't block the execute function
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block_execute = False
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@mock.patch.object(processutils, "execute", autospec=True)
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def test_no_exception_raised_for_execute(self, mock_exec):
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# Make sure we can call ironic_lib.utils.execute() even though we
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# didn't mock it. We do mock processutils.execute() so we don't
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# actually execute anything.
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utils.execute("ls")
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utils.execute("echo")
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self.assertEqual(2, mock_exec.call_count)
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