Add database migration tests

Simple patch adding database migration tests for OVN.

Partial-Bug: #1605089
Change-Id: I70e6fb1d2dc1324c4f7d3c7640d99d102c7985e3

networking_ovn/db/head.py

@@ -0,0 +1,22 @@
+# Copyright 2017 Red Hat, Inc.
+# 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.
+
+from networking_ovn.db import models  # noqa
+
+from neutron.db.migration.models import head
+
+
+def get_metadata():
+    return head.model_base.BASEV2.metadata

networking_ovn/tests/functional/db/test_migrations.py

@@ -0,0 +1,64 @@
+# Copyright 2017 Red Hat, Inc.
+# 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.
+
+from oslo_config import cfg
+
+from neutron.db.migration.alembic_migrations import external
+from neutron.db.migration import cli as migration
+from neutron.tests.functional.db import test_migrations
+from neutron.tests.unit import testlib_api
+
+from networking_ovn.db import head
+
+
+# EXTERNAL_TABLES should contain all names of tables that are not related to
+# current repo.
+
+EXTERNAL_TABLES = external.TABLES
+
+VERSION_TABLE = 'ovn_alembic_version'
+
+
+class _TestModelsMigrationsOVN(test_migrations._TestModelsMigrations):
+    def db_sync(self, engine):
+        cfg.CONF.set_override('connection', engine.url, group='database')
+        for conf in migration.get_alembic_configs():
+            self.alembic_config = conf
+            self.alembic_config.neutron_config = cfg.CONF
+            migration.do_alembic_command(conf, 'upgrade', 'heads')
+
+    def get_metadata(self):
+        return head.get_metadata()
+
+    def include_object(self, object_, name, type_, reflected, compare_to):
+        if type_ == 'table' and (name.startswith('alembic') or
+                                 name == VERSION_TABLE or
+                                 name in EXTERNAL_TABLES):
+            return False
+        if type_ == 'index' and reflected and name.startswith("idx_autoinc_"):
+            return False
+        return True
+
+
+class TestModelsMigrationsMysql(testlib_api.MySQLTestCaseMixin,
+                                _TestModelsMigrationsOVN,
+                                testlib_api.SqlTestCaseLight):
+    pass
+
+
+class TestModelsMigrationsPostgresql(testlib_api.PostgreSQLTestCaseMixin,
+                                     _TestModelsMigrationsOVN,
+                                     testlib_api.SqlTestCaseLight):
+    pass

networking_ovn/tests/functional/requirements.txt

@@ -0,0 +1,9 @@
+# Additional requirements for functional tests
+
+# The order of packages is significant, because pip processes them in the order
+# of appearance. Changing the order has an impact on the overall integration
+# process, which may cause wedges in the gate later.
+
+psutil>=1.1.1,<2.0.0
+psycopg2
+PyMySQL>=0.6.2  # MIT License

tox.ini

@@ -31,7 +31,8 @@ setenv =
   {[testenv]setenv}
   OS_TEST_PATH=./networking_ovn/tests/functional
   OS_TEST_TIMEOUT=120
-deps = {[testenv]deps}
+deps = {[testenv]deps}                                                          
+       -r{toxinidir}/networking_ovn/tests/functional/requirements.txt  
 
 [testenv:functional-py35]
 basepython = python3.5