Add db unit test framework

Change-Id: I5c14a4d49af4708b68ffceb08dac479481846f62
Signed-off-by: Zhijiang Hu <hu.zhijiang@zte.com.cn>

code/daisy/daisy/tests/test_migrations.py

@@ -0,0 +1,62 @@
+# Copyright 2010-2011 OpenStack Foundation
+# All Rights Reserved.
+# Copyright 2013 IBM Corp.
+#
+#    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.
+
+"""
+Tests for database migrations. This test case reads the configuration
+file /tests/test_migrations.conf for database connection settings
+to use in the tests. For each connection found in the config file,
+the test case runs a series of test cases to ensure that migrations work
+properly both upgrading and downgrading, and that no data loss occurs
+if possible.
+"""
+
+from __future__ import print_function
+
+import os
+
+from migrate.versioning import api as migration_api
+from migrate.versioning.repository import Repository
+from oslo_db.sqlalchemy import test_migrations
+
+from daisy.db import migration
+from daisy.db.sqlalchemy import migrate_repo
+
+from daisy import i18n
+
+_ = i18n._
+
+
+class MigrationsMixin(test_migrations.WalkVersionsMixin):
+    @property
+    def INIT_VERSION(self):
+        return migration.INIT_VERSION
+
+    @property
+    def REPOSITORY(self):
+        migrate_file = migrate_repo.__file__
+        return Repository(os.path.abspath(os.path.dirname(migrate_file)))
+
+    @property
+    def migration_api(self):
+        return migration_api
+
+    @property
+    def migrate_engine(self):
+        return self.engine
+
+    def test_walk_versions(self):
+        # No more downgrades
+        self._walk_versions(False, False)

code/daisy/test-requirements.txt

@@ -15,6 +15,7 @@ mock>=1.0
 sphinx>=1.1.2,!=1.2.0,!=1.3b1,<1.3
 requests>=2.2.0,!=2.4.0
 testrepository>=0.0.18
+testresources>=0.2.4 # Apache-2.0/BSD
 testscenarios>=0.4 # Apache-2.0/BSD
 testtools>=0.9.36,!=1.2.0
 psutil>=1.1.1,<2.0.0