9e60df30dc
Without this, the object registry can become cluttered with test objects, which may conflict with each other, depending on the order and pairing of testr processes. Related to unified-object-model Change-Id: I77d3beebfb963cdc24c49eebb38ca8a768c69503
306 lines
10 KiB
Python
306 lines
10 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2010 United States Government as represented by the
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# Administrator of the National Aeronautics and Space Administration.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""Base classes for our unit tests.
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Allows overriding of flags for use of fakes, and some black magic for
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inline callbacks.
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"""
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import eventlet
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eventlet.monkey_patch(os=False)
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import copy
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import os
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import shutil
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import sys
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import uuid
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import fixtures
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import mox
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from oslo.config import cfg
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import stubout
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import testtools
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from nova import context
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from nova import db
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from nova.db import migration
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from nova.network import manager as network_manager
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from nova.objects import base as objects_base
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from nova.openstack.common.db.sqlalchemy import session
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from nova.openstack.common import log as logging
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from nova.openstack.common import timeutils
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from nova import paths
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from nova import service
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from nova.tests import conf_fixture
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from nova.tests import policy_fixture
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test_opts = [
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cfg.StrOpt('sqlite_clean_db',
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default='clean.sqlite',
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help='File name of clean sqlite db'),
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]
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CONF = cfg.CONF
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CONF.register_opts(test_opts)
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CONF.import_opt('sql_connection',
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'nova.openstack.common.db.sqlalchemy.session')
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CONF.import_opt('sqlite_db', 'nova.openstack.common.db.sqlalchemy.session')
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CONF.import_opt('enabled', 'nova.api.openstack', group='osapi_v3')
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CONF.set_override('use_stderr', False)
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logging.setup('nova')
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_DB_CACHE = None
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class Database(fixtures.Fixture):
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def __init__(self, db_session, db_migrate, sql_connection,
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sqlite_db, sqlite_clean_db):
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self.sql_connection = sql_connection
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self.sqlite_db = sqlite_db
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self.sqlite_clean_db = sqlite_clean_db
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self.engine = db_session.get_engine()
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self.engine.dispose()
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conn = self.engine.connect()
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if sql_connection == "sqlite://":
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if db_migrate.db_version() > db_migrate.INIT_VERSION:
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return
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else:
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testdb = paths.state_path_rel(sqlite_db)
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if os.path.exists(testdb):
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return
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db_migrate.db_sync()
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if sql_connection == "sqlite://":
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conn = self.engine.connect()
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self._DB = "".join(line for line in conn.connection.iterdump())
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self.engine.dispose()
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else:
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cleandb = paths.state_path_rel(sqlite_clean_db)
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shutil.copyfile(testdb, cleandb)
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def setUp(self):
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super(Database, self).setUp()
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if self.sql_connection == "sqlite://":
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conn = self.engine.connect()
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conn.connection.executescript(self._DB)
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self.addCleanup(self.engine.dispose)
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else:
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shutil.copyfile(paths.state_path_rel(self.sqlite_clean_db),
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paths.state_path_rel(self.sqlite_db))
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class SampleNetworks(fixtures.Fixture):
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"""Create sample networks in the database."""
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def setUp(self):
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super(SampleNetworks, self).setUp()
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ctxt = context.get_admin_context()
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network = network_manager.VlanManager()
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bridge_interface = CONF.flat_interface or CONF.vlan_interface
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network.create_networks(ctxt,
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label='test',
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cidr=CONF.fixed_range,
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multi_host=CONF.multi_host,
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num_networks=CONF.num_networks,
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network_size=CONF.network_size,
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cidr_v6=CONF.fixed_range_v6,
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gateway=CONF.gateway,
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gateway_v6=CONF.gateway_v6,
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bridge=CONF.flat_network_bridge,
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bridge_interface=bridge_interface,
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vpn_start=CONF.vpn_start,
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vlan_start=CONF.vlan_start,
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dns1=CONF.flat_network_dns)
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for net in db.network_get_all(ctxt):
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network.set_network_host(ctxt, net)
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class ReplaceModule(fixtures.Fixture):
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"""Replace a module with a fake module."""
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def __init__(self, name, new_value):
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self.name = name
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self.new_value = new_value
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def _restore(self, old_value):
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sys.modules[self.name] = old_value
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def setUp(self):
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super(ReplaceModule, self).setUp()
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old_value = sys.modules.get(self.name)
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sys.modules[self.name] = self.new_value
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self.addCleanup(self._restore, old_value)
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class ServiceFixture(fixtures.Fixture):
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"""Run a service as a test fixture."""
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def __init__(self, name, host=None, **kwargs):
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name = name
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host = host and host or uuid.uuid4().hex
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kwargs.setdefault('host', host)
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kwargs.setdefault('binary', 'nova-%s' % name)
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self.kwargs = kwargs
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def setUp(self):
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super(ServiceFixture, self).setUp()
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self.service = service.Service.create(**self.kwargs)
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self.service.start()
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self.addCleanup(self.service.kill)
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class MoxStubout(fixtures.Fixture):
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"""Deal with code around mox and stubout as a fixture."""
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def setUp(self):
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super(MoxStubout, self).setUp()
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# emulate some of the mox stuff, we can't use the metaclass
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# because it screws with our generators
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self.mox = mox.Mox()
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self.stubs = stubout.StubOutForTesting()
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self.addCleanup(self.stubs.UnsetAll)
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self.addCleanup(self.stubs.SmartUnsetAll)
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self.addCleanup(self.mox.UnsetStubs)
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self.addCleanup(self.mox.VerifyAll)
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class TestingException(Exception):
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pass
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class TestCase(testtools.TestCase):
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"""Test case base class for all unit tests.
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Due to the slowness of DB access, please consider deriving from
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`NoDBTestCase` first.
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"""
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USES_DB = True
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def setUp(self):
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"""Run before each test method to initialize test environment."""
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super(TestCase, self).setUp()
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test_timeout = os.environ.get('OS_TEST_TIMEOUT', 0)
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try:
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test_timeout = int(test_timeout)
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except ValueError:
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# If timeout value is invalid do not set a timeout.
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test_timeout = 0
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if test_timeout > 0:
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self.useFixture(fixtures.Timeout(test_timeout, gentle=True))
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self.useFixture(fixtures.NestedTempfile())
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self.useFixture(fixtures.TempHomeDir())
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if (os.environ.get('OS_STDOUT_CAPTURE') == 'True' or
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os.environ.get('OS_STDOUT_CAPTURE') == '1'):
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stdout = self.useFixture(fixtures.StringStream('stdout')).stream
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self.useFixture(fixtures.MonkeyPatch('sys.stdout', stdout))
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if (os.environ.get('OS_STDERR_CAPTURE') == 'True' or
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os.environ.get('OS_STDERR_CAPTURE') == '1'):
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stderr = self.useFixture(fixtures.StringStream('stderr')).stream
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self.useFixture(fixtures.MonkeyPatch('sys.stderr', stderr))
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self.log_fixture = self.useFixture(fixtures.FakeLogger())
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self.useFixture(conf_fixture.ConfFixture(CONF))
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if self.USES_DB:
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global _DB_CACHE
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if not _DB_CACHE:
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_DB_CACHE = Database(session, migration,
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sql_connection=CONF.sql_connection,
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sqlite_db=CONF.sqlite_db,
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sqlite_clean_db=CONF.sqlite_clean_db)
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self.useFixture(_DB_CACHE)
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# NOTE(danms): Make sure to reset us back to non-remote objects
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# for each test to avoid interactions. Also, backup the object
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# registry.
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objects_base.NovaObject.indirection_api = None
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self._base_test_obj_backup = copy.copy(
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objects_base.NovaObject._obj_classes)
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self.addCleanup(self._restore_obj_registry)
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mox_fixture = self.useFixture(MoxStubout())
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self.mox = mox_fixture.mox
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self.stubs = mox_fixture.stubs
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self.addCleanup(self._clear_attrs)
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self.useFixture(fixtures.EnvironmentVariable('http_proxy'))
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self.policy = self.useFixture(policy_fixture.PolicyFixture())
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CONF.set_override('fatal_exception_format_errors', True)
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CONF.set_override('enabled', True, 'osapi_v3')
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def _restore_obj_registry(self):
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objects_base.NovaObject._obj_classes = self._base_test_obj_backup
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def _clear_attrs(self):
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# Delete attributes that don't start with _ so they don't pin
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# memory around unnecessarily for the duration of the test
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# suite
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for key in [k for k in self.__dict__.keys() if k[0] != '_']:
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del self.__dict__[key]
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def flags(self, **kw):
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"""Override flag variables for a test."""
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group = kw.pop('group', None)
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for k, v in kw.iteritems():
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CONF.set_override(k, v, group)
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def start_service(self, name, host=None, **kwargs):
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svc = self.useFixture(ServiceFixture(name, host, **kwargs))
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return svc.service
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class APICoverage(object):
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cover_api = None
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def test_api_methods(self):
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self.assertTrue(self.cover_api is not None)
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api_methods = [x for x in dir(self.cover_api)
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if not x.startswith('_')]
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test_methods = [x[5:] for x in dir(self)
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if x.startswith('test_')]
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self.assertThat(
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test_methods,
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testtools.matchers.ContainsAll(api_methods))
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class TimeOverride(fixtures.Fixture):
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"""Fixture to start and remove time override."""
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def setUp(self):
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super(TimeOverride, self).setUp()
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timeutils.set_time_override()
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self.addCleanup(timeutils.clear_time_override)
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class NoDBTestCase(TestCase):
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"""
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`NoDBTestCase` differs from TestCase in that DB access is not supported.
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This makes tests run significantly faster. If possible, all new tests
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should derive from this class.
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"""
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USES_DB = False
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