Add common base class for test cases

Adds a base class that includes parts common to API and scenario tests.

Change-Id: I1485228520d641d94bf9a1f5c7bbb2a306b63bf2
Signed-off-by: Bartosz Zurkowski <b.zurkowski@samsung.com>

trove_tempest_plugin/tests/api/test_flavors.py

@@ -17,10 +17,10 @@ from tempest.common import utils
 from tempest.lib import decorators
 from testtools import testcase as testtools
 
-from trove_tempest_plugin.tests.api import base
+from trove_tempest_plugin.tests import base_test
 
 
-class DatabaseFlavorsTest(base.BaseDatabaseTest):
+class DatabaseFlavorsTest(base_test.BaseDatabaseTest):
 
     @classmethod
     def setup_clients(cls):

trove_tempest_plugin/tests/api/test_flavors_negative.py

@@ -18,10 +18,10 @@ from tempest.lib import decorators
 from tempest.lib import exceptions as lib_exc
 from testtools import testcase as testtools
 
-from trove_tempest_plugin.tests.api import base
+from trove_tempest_plugin.tests import base_test
 
 
-class DatabaseFlavorsNegativeTest(base.BaseDatabaseTest):
+class DatabaseFlavorsNegativeTest(base_test.BaseDatabaseTest):
 
     @classmethod
     def setup_clients(cls):

trove_tempest_plugin/tests/api/test_limits.py

@@ -16,10 +16,10 @@
 from tempest.lib import decorators
 from testtools import testcase as testtools
 
-from trove_tempest_plugin.tests.api import base
+from trove_tempest_plugin.tests import base_test
 
 
-class DatabaseLimitsTest(base.BaseDatabaseTest):
+class DatabaseLimitsTest(base_test.BaseDatabaseTest):
 
     @classmethod
     def resource_setup(cls):

trove_tempest_plugin/tests/api/test_versions.py

@@ -16,10 +16,10 @@
 from tempest.lib import decorators
 from testtools import testcase as testtools
 
-from trove_tempest_plugin.tests.api import base
+from trove_tempest_plugin.tests import base_test
 
 
-class DatabaseVersionsTest(base.BaseDatabaseTest):
+class DatabaseVersionsTest(base_test.BaseDatabaseTest):
 
     @classmethod
     def setup_clients(cls):

trove_tempest_plugin/tests/base_test.py

@@ -14,15 +14,20 @@
 #    under the License.
 
 from tempest import config
-import tempest.test
+from tempest import test
 
 from trove_tempest_plugin import clients
 
 CONF = config.CONF
 
 
-class BaseDatabaseTest(tempest.test.BaseTestCase):
-    """Base test case class for all Database API tests."""
+class BaseDatabaseTest(test.BaseTestCase):
+    """Base test case class.
+
+    Includes parts common to API and scenario tests:
+        * test case callbacks,
+        * service clients initialization.
+    """
 
     credentials = ['primary']
     client_manager = clients.Manager
@@ -76,7 +81,6 @@ class BaseDatabaseTest(tempest.test.BaseTestCase):
     @classmethod
     def resource_setup(cls):
         super(BaseDatabaseTest, cls).resource_setup()
-
         cls.catalog_type = CONF.database.catalog_type
         cls.db_flavor_ref = CONF.database.db_flavor_ref
         cls.db_current_version = CONF.database.db_current_version