/
notification_sample_base.py
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/
notification_sample_base.py
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# 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.
import os
import time
import mock
from oslo_config import cfg
from oslo_serialization import jsonutils
from oslo_utils import fixture as utils_fixture
from nova import test
from nova.tests import fixtures as nova_fixtures
from nova.tests.functional.api import client as api_client
from nova.tests.functional import integrated_helpers
from nova.tests.unit.api.openstack.compute import test_services
from nova.tests.unit import fake_notifier
import nova.tests.unit.image.fake
CONF = cfg.CONF
class NotificationSampleTestBase(test.TestCase,
integrated_helpers.InstanceHelperMixin):
"""Base class for notification sample testing.
To add tests for a versioned notification you have to store a sample file
under doc/notification_sample directory. In the test method in the subclass
trigger a change in the system that expected to generate the notification
then use the _verify_notification function to assert if the stored sample
matches with the generated one.
If the notification has different payload content depending on the state
change you triggered then the replacements parameter of the
_verify_notification function can be used to override values coming from
the sample file.
Check nova.functional.notification_sample_tests.test_service_update as an
example.
"""
ANY = object()
def setUp(self):
super(NotificationSampleTestBase, self).setUp()
# Needs to mock this to avoid REQUIRES_LOCKING to be set to True
patcher = mock.patch('oslo_concurrency.lockutils.lock')
self.addCleanup(patcher.stop)
patcher.start()
api_fixture = self.useFixture(nova_fixtures.OSAPIFixture(
api_version='v2.1'))
self.api = api_fixture.api
self.admin_api = api_fixture.admin_api
fake_notifier.stub_notifier(self)
self.addCleanup(fake_notifier.reset)
self.useFixture(utils_fixture.TimeFixture(test_services.fake_utcnow()))
self.flags(driver='chance_scheduler', group='scheduler')
# the image fake backend needed for image discovery
nova.tests.unit.image.fake.stub_out_image_service(self)
self.addCleanup(nova.tests.unit.image.fake.FakeImageService_reset)
self.start_service('conductor')
self.start_service('scheduler')
self.start_service('network', manager=CONF.network_manager)
self.compute = self.start_service('compute')
def _get_notification_sample(self, sample):
sample_dir = os.path.dirname(os.path.abspath(__file__))
sample_dir = os.path.normpath(os.path.join(
sample_dir,
"../../../../doc/notification_samples"))
return sample_dir + '/' + sample + '.json'
def _apply_replacements(self, replacements, sample_obj, notification):
replacements = replacements or {}
for key, value in replacements.items():
obj = sample_obj['payload']
n_obj = notification['payload']
for sub_key in key.split('.')[:-1]:
obj = obj['nova_object.data'][sub_key]
n_obj = n_obj['nova_object.data'][sub_key]
if value == NotificationSampleTestBase.ANY:
del obj['nova_object.data'][key.split('.')[-1]]
del n_obj['nova_object.data'][key.split('.')[-1]]
else:
obj['nova_object.data'][key.split('.')[-1]] = value
def _verify_notification(self, sample_file_name, replacements=None,
actual=None):
"""Assert if the generated notification matches with the stored sample
:param sample_file_name: The name of the sample file to match relative
to doc/notification_samples
:param replacements: A dict of key value pairs that is used to update
the payload field of the sample data before it is
matched against the generated notification.
The 'x.y':'new-value' key-value pair selects the
["payload"]["nova_object.data"]["x"]
["nova_object.data"]["y"] value from the sample
data and overrides it with 'new-value'. There is
a special value ANY that can be used to indicate
that the actual field value shall be ignored
during matching.
:param actual: Defines the actual notification to compare with. If
None then it defaults to the first versioned
notification emitted during the test.
"""
if not actual:
self.assertEqual(1, len(fake_notifier.VERSIONED_NOTIFICATIONS))
notification = fake_notifier.VERSIONED_NOTIFICATIONS[0]
else:
notification = actual
with open(self._get_notification_sample(sample_file_name)) as sample:
sample_data = sample.read()
sample_obj = jsonutils.loads(sample_data)
self._apply_replacements(replacements, sample_obj, notification)
self.assertJsonEqual(sample_obj, notification)
def _boot_a_server(self, expected_status='ACTIVE', extra_params=None):
# We have to depend on a specific image and flavor to fix the content
# of the notification that will be emitted
flavor_body = {'flavor': {'name': 'test_flavor',
'ram': 512,
'vcpus': 1,
'disk': 1,
'id': 'a22d5517-147c-4147-a0d1-e698df5cd4e3'
}}
flavor_id = self.api.post_flavor(flavor_body)['id']
server = self._build_minimal_create_server_request(
self.api, 'some-server',
image_uuid='155d900f-4e14-4e4c-a73d-069cbf4541e6',
flavor_id=flavor_id)
if extra_params:
extra_params['return_reservation_id'] = True
server.update(extra_params)
post = {'server': server}
created_server = self.api.post_server(post)
reservation_id = created_server['reservation_id']
created_server = self.api.get_servers(
detail=False,
search_opts={'reservation_id': reservation_id})[0]
self.assertTrue(created_server['id'])
# Wait for it to finish being created
found_server = self._wait_for_state_change(self.api, created_server,
expected_status)
found_server['reservation_id'] = reservation_id
return found_server
def _wait_until_deleted(self, server):
try:
for i in range(40):
server = self.api.get_server(server['id'])
if server['status'] == 'ERROR':
self.fail('Server went to error state instead of'
'disappearing.')
time.sleep(0.5)
self.fail('Server failed to delete.')
except api_client.OpenStackApiNotFoundException:
return
def _get_notifications(self, event_type):
return [notification for notification
in fake_notifier.VERSIONED_NOTIFICATIONS
if notification['event_type'] == event_type]
def _wait_for_notification(self, event_type, timeout=1.0):
received = fake_notifier.wait_for_versioned_notification(
event_type, timeout)
self.assertTrue(
received,
'notification %s hasn\'t been received' % event_type)