placement/placement/tests/fixtures.py

76 lines
3.0 KiB
Python

# Copyright 2010 United States Government as represented by the
# Administrator of the National Aeronautics and Space Administration.
# 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.
"""Fixtures for Placement tests."""
from __future__ import absolute_import
from oslo_config import cfg
from oslo_db.sqlalchemy import test_fixtures
from placement.db.sqlalchemy import migration
from placement import db_api as placement_db
from placement import deploy
from placement.objects import resource_provider
class Database(test_fixtures.GeneratesSchema, test_fixtures.AdHocDbFixture):
def __init__(self, conf_fixture, set_config=False):
"""Create a database fixture."""
super(Database, self).__init__()
if set_config:
try:
conf_fixture.register_opt(
cfg.StrOpt('connection'), group='placement_database')
except cfg.DuplicateOptError:
# already registered
pass
conf_fixture.config(connection='sqlite://',
group='placement_database')
self.conf_fixture = conf_fixture
self.get_engine = placement_db.get_placement_engine
placement_db.configure(self.conf_fixture.conf)
def get_enginefacade(self):
return placement_db.placement_context_manager
def generate_schema_create_all(self, engine):
# note: at this point in oslo_db's fixtures, the incoming
# Engine has **not** been associated with the global
# context manager yet.
migration.create_schema(engine)
# so, to work around that placement's setup code really wants to
# use the enginefacade, we will patch the engine into it early.
# oslo_db is going to patch it anyway later. So the bug in oslo.db
# is that code these days really wants the facade to be set up fully
# when it's time to create the database. When oslo_db's fixtures
# were written, enginefacade was not in use yet so it was not
# anticipated that everyone would be doing things this way
_reset_facade = placement_db.placement_context_manager.patch_engine(
engine)
self.addCleanup(_reset_facade)
self.addCleanup(self.cleanup)
resource_provider._TRAITS_SYNCED = False
resource_provider._RC_CACHE = None
deploy.update_database()
self.addCleanup(self.cleanup)
def cleanup(self):
resource_provider._TRAITS_SYNCED = False
resource_provider._RC_CACHE = None