oslo.db/oslo_db/sqlalchemy/test_base.py
Mike Bayer 1a41b77ba6 Support facade arguments, unstarted facade for patch_engine()
Fixed two issues in patch_engine() as used in test suites
where facade-level arguments would not be propagated to the
internal _TestTransactionFactory, and also if the parent
factory weren't "started" the patch operation would fail
as it assumes a started factory.

This removes the "synchronous_reader" argument from
_TestTransactionFactory as this is propagated from the parent
_TransactionFactory, where synchronous_reader defaults to True.
However, arbitrary keyword arguments are currently allowed to
allow for outside projects calling _TestTransactionFactory
(currently Neutron).

Change-Id: I15f85a0ebfd732c09d7cb92d885c1773c393aabd
2017-02-16 13:11:24 +02:00

248 lines
8.8 KiB
Python

# Copyright (c) 2013 OpenStack Foundation
# 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 debtcollector
import debtcollector.moves
import fixtures
import testresources
try:
from oslotest import base as test_base
except ImportError:
raise NameError('Oslotest is not installed. Please add oslotest in your'
' test-requirements')
from oslo_utils import reflection
import six
from oslo_db import exception
from oslo_db.sqlalchemy import enginefacade
from oslo_db.sqlalchemy import provision
from oslo_db.sqlalchemy import session
from oslo_db.sqlalchemy.test_fixtures import optimize_package_test_loader
@debtcollector.removals.removed_class("DbFixture")
class DbFixture(fixtures.Fixture):
"""Basic database fixture.
Allows to run tests on various db backends, such as SQLite, MySQL and
PostgreSQL. By default use sqlite backend. To override default backend
uri set env variable OS_TEST_DBAPI_ADMIN_CONNECTION with database admin
credentials for specific backend.
"""
DRIVER = "sqlite"
# these names are deprecated, and are not used by DbFixture.
# they are here for backwards compatibility with test suites that
# are referring to them directly.
DBNAME = PASSWORD = USERNAME = 'openstack_citest'
def __init__(self, test, skip_on_unavailable_db=True):
super(DbFixture, self).__init__()
self.test = test
self.skip_on_unavailable_db = skip_on_unavailable_db
def setUp(self):
super(DbFixture, self).setUp()
testresources.setUpResources(
self.test, self.test.resources, testresources._get_result())
self.addCleanup(
testresources.tearDownResources,
self.test, self.test.resources, testresources._get_result()
)
if not self.test._has_db_resource():
msg = self.test._get_db_resource_not_available_reason()
if self.test.SKIP_ON_UNAVAILABLE_DB:
self.test.skip(msg)
else:
self.test.fail(msg)
if self.test.SCHEMA_SCOPE:
self.test.engine = self.test.transaction_engine
self.test.sessionmaker = session.get_maker(
self.test.transaction_engine)
else:
self.test.engine = self.test.db.engine
self.test.sessionmaker = session.get_maker(self.test.engine)
self.addCleanup(setattr, self.test, 'sessionmaker', None)
self.addCleanup(setattr, self.test, 'engine', None)
self.test.enginefacade = enginefacade._TestTransactionFactory(
self.test.engine, self.test.sessionmaker, apply_global=True)
self.addCleanup(self.test.enginefacade.dispose_global)
@debtcollector.removals.removed_class("DbTestCase")
class DbTestCase(test_base.BaseTestCase):
"""Base class for testing of DB code.
"""
FIXTURE = DbFixture
SCHEMA_SCOPE = None
SKIP_ON_UNAVAILABLE_DB = True
_db_not_available = {}
_schema_resources = {}
_database_resources = {}
def _get_db_resource_not_available_reason(self):
return self._db_not_available.get(self.FIXTURE.DRIVER, None)
def _has_db_resource(self):
return self._database_resources.get(
self.FIXTURE.DRIVER, None) is not None
def _resources_for_driver(self, driver, schema_scope, generate_schema):
# testresources relies on the identity and state of the
# TestResourceManager objects in play to correctly manage
# resources, and it also hardcodes to looking at the
# ".resources" attribute on the test object, even though the
# setUpResources() function passes the list of resources in,
# so we have to code the TestResourceManager logic into the
# .resources attribute and ensure that the same set of test
# variables always produces the same TestResourceManager objects.
if driver not in self._database_resources:
try:
self._database_resources[driver] = \
provision.DatabaseResource(driver,
provision_new_database=True)
except exception.BackendNotAvailable as bne:
self._database_resources[driver] = None
self._db_not_available[driver] = str(bne)
database_resource = self._database_resources[driver]
if database_resource is None:
return []
if schema_scope:
key = (driver, schema_scope)
if key not in self._schema_resources:
schema_resource = provision.SchemaResource(
database_resource, generate_schema)
transaction_resource = provision.TransactionResource(
database_resource, schema_resource)
self._schema_resources[key] = \
transaction_resource
transaction_resource = self._schema_resources[key]
return [
('transaction_engine', transaction_resource),
('db', database_resource),
]
else:
key = (driver, None)
if key not in self._schema_resources:
self._schema_resources[key] = provision.SchemaResource(
database_resource, generate_schema, teardown=True)
schema_resource = self._schema_resources[key]
return [
('schema', schema_resource),
('db', database_resource)
]
@property
def resources(self):
return self._resources_for_driver(
self.FIXTURE.DRIVER, self.SCHEMA_SCOPE, self.generate_schema)
def setUp(self):
super(DbTestCase, self).setUp()
self.useFixture(
self.FIXTURE(
self, skip_on_unavailable_db=self.SKIP_ON_UNAVAILABLE_DB))
def generate_schema(self, engine):
"""Generate schema objects to be used within a test.
The function is separate from the setUp() case as the scope
of this method is controlled by the provisioning system. A
test that specifies SCHEMA_SCOPE may not call this method
for each test, as the schema may be maintained from a previous run.
"""
if self.SCHEMA_SCOPE:
# if SCHEMA_SCOPE is set, then this method definitely
# has to be implemented. This is a guard against a test
# that inadvertently does schema setup within setUp().
raise NotImplementedError(
"This test requires schema-level setup to be "
"implemented within generate_schema().")
@debtcollector.removals.removed_class("OpportunisticTestCase")
class OpportunisticTestCase(DbTestCase):
"""Placeholder for backwards compatibility."""
ALLOWED_DIALECTS = ['sqlite', 'mysql', 'postgresql']
def backend_specific(*dialects):
"""Decorator to skip backend specific tests on inappropriate engines.
::dialects: list of dialects names under which the test will be launched.
"""
def wrap(f):
@six.wraps(f)
def ins_wrap(self):
if not set(dialects).issubset(ALLOWED_DIALECTS):
raise ValueError(
"Please use allowed dialects: %s" % ALLOWED_DIALECTS)
if self.engine.name not in dialects:
msg = ('The test "%s" can be run '
'only on %s. Current engine is %s.')
args = (reflection.get_callable_name(f), ', '.join(dialects),
self.engine.name)
self.skip(msg % args)
else:
return f(self)
return ins_wrap
return wrap
@debtcollector.removals.removed_class("MySQLOpportunisticFixture")
class MySQLOpportunisticFixture(DbFixture):
DRIVER = 'mysql'
@debtcollector.removals.removed_class("PostgreSQLOpportunisticFixture")
class PostgreSQLOpportunisticFixture(DbFixture):
DRIVER = 'postgresql'
@debtcollector.removals.removed_class("MySQLOpportunisticTestCase")
class MySQLOpportunisticTestCase(OpportunisticTestCase):
FIXTURE = MySQLOpportunisticFixture
@debtcollector.removals.removed_class("PostgreSQLOpportunisticTestCase")
class PostgreSQLOpportunisticTestCase(OpportunisticTestCase):
FIXTURE = PostgreSQLOpportunisticFixture
optimize_db_test_loader = debtcollector.moves.moved_function(
optimize_package_test_loader, "optimize_db_test_loader", __name__)