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# Copyright (c) 2013 OpenStack Foundation.
#
# 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 mock
from oslotest import base as test_base
from oslotest import moxstubout
from openstack.common.scheduler import base_filter
class TestBaseFilter(test_base.BaseTestCase):
def setUp(self):
super(TestBaseFilter, self).setUp()
self.mox = self.useFixture(moxstubout.MoxStubout()).mox
self.filter = base_filter.BaseFilter()
def test_filter_one_is_called(self):
filters = [1, 2, 3, 4]
filter_properties = {'x': 'y'}
self.mox.StubOutWithMock(self.filter, '_filter_one')
self.filter._filter_one(1, filter_properties).AndReturn(False)
self.filter._filter_one(2, filter_properties).AndReturn(True)
self.filter._filter_one(3, filter_properties).AndReturn(True)
self.filter._filter_one(4, filter_properties).AndReturn(False)
self.mox.ReplayAll()
result = list(self.filter.filter_all(filters, filter_properties))
self.assertEqual([2, 3], result)
class FakeExtension(object):
def __init__(self, plugin):
self.plugin = plugin
class BaseFakeFilter(base_filter.BaseFilter):
pass
class FakeFilter1(BaseFakeFilter):
"""Derives from BaseFakeFilter and has a fake entry point defined.
Entry point is returned by fake ExtensionManager.
Should be included in the output of all_classes.
"""
pass
class FakeFilter2(BaseFakeFilter):
"""Derives from BaseFakeFilter but has no entry point.
Should be not included in all_classes.
"""
pass
class FakeFilter3(base_filter.BaseFilter):
"""Does not derive from BaseFakeFilter.
Should not be included.
"""
pass
class FakeFilter4(BaseFakeFilter):
"""Derives from BaseFakeFilter and has an entry point.
Should be included.
"""
pass
class FakeFilter5(BaseFakeFilter):
"""Derives from BaseFakeFilter but has no entry point.
Should not be included.
"""
run_filter_once_per_request = True
pass
class FakeExtensionManager(list):
def __init__(self, namespace):
classes = [FakeFilter1, FakeFilter3, FakeFilter4]
exts = map(FakeExtension, classes)
super(FakeExtensionManager, self).__init__(exts)
self.namespace = namespace
class TestBaseFilterHandler(test_base.BaseTestCase):
def setUp(self):
super(TestBaseFilterHandler, self).setUp()
self.stubs = self.useFixture(moxstubout.MoxStubout()).stubs
self.stubs.Set(base_filter.base_handler.extension, 'ExtensionManager',
FakeExtensionManager)
self.handler = base_filter.BaseFilterHandler(BaseFakeFilter,
'fake_filters')
def test_get_all_classes(self):
# In order for a FakeFilter to be returned by get_all_classes, it has
# to comply with these rules:
# * It must be derived from BaseFakeFilter
# AND
# * It must have a python entrypoint assigned (returned by
# FakeExtensionManager)
expected = [FakeFilter1, FakeFilter4]
result = self.handler.get_all_classes()
self.assertEqual(expected, result)
def _get_filtered_objects(self, filter_classes, index=0):
filter_objs_initial = [1, 2, 3, 4]
filter_properties = {'x': 'y'}
return self.handler.get_filtered_objects(filter_classes,
filter_objs_initial,
filter_properties,
index)
@mock.patch.object(FakeFilter4, 'filter_all')
@mock.patch.object(FakeFilter3, 'filter_all', return_value=None)
def test_get_filtered_objects_return_none(self, fake3_filter_all,
fake4_filter_all):
filter_classes = [FakeFilter1, FakeFilter2, FakeFilter3, FakeFilter4]
result = self._get_filtered_objects(filter_classes)
self.assertIsNone(result)
self.assertFalse(fake4_filter_all.called)
def test_get_filtered_objects(self):
filter_objs_expected = [1, 2, 3, 4]
filter_classes = [FakeFilter1, FakeFilter2, FakeFilter3, FakeFilter4]
result = self._get_filtered_objects(filter_classes)
self.assertEqual(filter_objs_expected, result)
def test_get_filtered_objects_with_filter_run_once(self):
filter_objs_expected = [1, 2, 3, 4]
filter_classes = [FakeFilter5]
with mock.patch.object(FakeFilter5, 'filter_all',
return_value=filter_objs_expected
) as fake5_filter_all:
result = self._get_filtered_objects(filter_classes)
self.assertEqual(filter_objs_expected, result)
self.assertEqual(1, fake5_filter_all.call_count)
result = self._get_filtered_objects(filter_classes, index=1)
self.assertEqual(filter_objs_expected, result)
self.assertEqual(1, fake5_filter_all.call_count)
result = self._get_filtered_objects(filter_classes, index=2)
self.assertEqual(filter_objs_expected, result)
self.assertEqual(1, fake5_filter_all.call_count)
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