Add base unit tests

Change-Id: Ica54ba17dfa9a7f930d6f2f321c86aa79657878d

nimble/tests/base.py

@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-
 # Copyright 2010-2011 OpenStack Foundation
 # Copyright (c) 2013 Hewlett-Packard Development Company, L.P.
 #
@@ -15,9 +13,83 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+import os
+
+from oslo_config import cfg
+from oslo_config import fixture as config_fixture
+from oslo_db import options
+from oslo_log import log
 from oslotest import base
+import pecan
+import testscenarios
+
+from nimble.common import config as nimble_config
+
+
+CONF = cfg.CONF
+options.set_defaults(cfg.CONF)
+try:
+    log.register_options(CONF)
+except cfg.ArgsAlreadyParsedError:
+    pass
+
+
+class BaseTestCase(testscenarios.WithScenarios, base.BaseTestCase):
+    """Test base class."""
+
+    def setUp(self):
+        super(BaseTestCase, self).setUp()
+        self.addCleanup(CONF.reset)
 
 
 class TestCase(base.BaseTestCase):
-
     """Test case base class for all unit tests."""
+
+    def setUp(self):
+        super(TestCase, self).setUp()
+
+        self._set_config()
+
+        def reset_pecan():
+            pecan.set_config({}, overwrite=True)
+
+        self.addCleanup(reset_pecan)
+
+    def _set_config(self):
+        self.cfg_fixture = self.useFixture(config_fixture.Config(cfg.CONF))
+        self.config(use_stderr=False,
+                    fatal_exception_format_errors=True)
+        self.set_defaults(host='fake-mini',
+                          debug=True)
+        self.set_defaults(connection="sqlite://",
+                          sqlite_synchronous=False,
+                          group='database')
+        nimble_config.parse_args([], default_config_files=[])
+
+    def config(self, **kw):
+        """Override config options for a test."""
+        group = kw.pop('group', None)
+        for k, v in kw.items():
+            CONF.set_override(k, v, group, enforce_type=True)
+
+    def set_defaults(self, **kw):
+        """Set default values of config options."""
+        group = kw.pop('group', None)
+        for o, v in kw.items():
+            self.cfg_fixture.set_default(o, v, group=group)
+
+    def get_path(self, project_file=None):
+        """Get the absolute path to a file. Used for testing the API.
+
+        :param project_file: File whose path to return. Default: None.
+        :returns: path to the specified file, or path to project root.
+        """
+        root = os.path.abspath(os.path.join(os.path.dirname(__file__),
+                                            '..',
+                                            '..',
+                                            )
+                               )
+        if project_file:
+            return os.path.join(root, project_file)
+        else:
+            return root