[placement] Extract base functional test case from test_direct

In subsequent patches this will be used for making the rest of the
placement functional tests either not-use or centralized their
dependence on nova test fixtures and base classes.

blueprint: placement-extract
Change-Id: I24d9fb2d06bf5c99bcea6c9f138ce31713bb8356

nova/tests/functional/api/openstack/placement/base.py

@@ -0,0 +1,56 @@
+#    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.
+
+from oslo_config import cfg
+from oslo_config import fixture as config_fixture
+import testtools
+
+from nova.api.openstack.placement.objects import resource_provider
+from nova import config
+from nova import context
+from nova.tests import fixtures
+from nova.tests.unit import policy_fixture
+
+
+CONF = cfg.CONF
+
+
+class TestCase(testtools.TestCase):
+    """A base test case for placement functional tests.
+
+    Sets up minimum configuration for database and policy handling
+    and establishes the placement database.
+    """
+
+    def setUp(self):
+        super(TestCase, self).setUp()
+
+        # Manage required configuration
+        conf_fixture = self.useFixture(config_fixture.Config(CONF))
+        conf_fixture.conf.set_default(
+            'connection', "sqlite://", group='placement_database')
+        conf_fixture.conf.set_default(
+            'sqlite_synchronous', False, group='placement_database')
+        config.parse_args([], default_config_files=[], configure_db=False,
+            init_rpc=False)
+
+        self.useFixture(policy_fixture.PlacementPolicyFixture())
+        self.placement_db = self.useFixture(
+            fixtures.Database(database='placement'))
+        self._reset_traits_synced()
+        self.context = context.get_admin_context()
+        self.addCleanup(self._reset_traits_synced)
+
+    @staticmethod
+    def _reset_traits_synced():
+        """Reset the _TRAITS_SYNCED boolean to base state."""
+        resource_provider._TRAITS_SYNCED = False

nova/tests/functional/api/openstack/placement/test_direct.py

@@ -12,32 +12,15 @@
 
 from oslo_config import cfg
 
-from nova.api.openstack.placement import context
 from nova.api.openstack.placement import direct
-from nova.api.openstack.placement.objects import resource_provider
-from nova import test
-from nova.tests import fixtures
+from nova.tests.functional.api.openstack.placement import base
 from nova.tests import uuidsentinel
 
 
 CONF = cfg.CONF
 
 
-# FIXME(cdent): some dupes with db/test_base.py
-class TestDirect(test.NoDBTestCase):
-    USES_DB_SELF = True
-
-    def setUp(self):
-        super(TestDirect, self).setUp()
-        self.api_db = self.useFixture(fixtures.Database(database='placement'))
-        self._reset_traits_synced()
-        self.context = context.RequestContext()
-        self.addCleanup(self._reset_traits_synced)
-
-    @staticmethod
-    def _reset_traits_synced():
-        """Reset the _TRAITS_SYNCED boolean to base state."""
-        resource_provider._TRAITS_SYNCED = False
+class TestDirect(base.TestCase):
 
     def test_direct_is_there(self):
         with direct.PlacementDirect(CONF) as client: