Enable debug logging in tests

Since log messages interpolation is frequently postponed
till the logging time, occasional bugs in message
templates may go unnoticed.

This patch attempts to enable full logging in unit tests.

Unfortunately, exceptions caused by interpolation failures
get inhibited by the logging module code so they do not
actually fail tests. But at least those exceptions are
noticeable on stdout.

Change-Id: I1b32476c5bb631cef9b1269effd05a88a9fafd2d

virtualbmc/tests/unit/base.py

@@ -14,9 +14,18 @@
 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 # License for the specific language governing permissions and limitations
 # under the License.
+import logging
+
 from oslotest import base
 
+from virtualbmc import log as vbmc_log
+
 
 class TestCase(base.BaseTestCase):
-
     """Test case base class for all unit tests."""
+    def setUp(self):
+        super(TestCase, self).setUp()
+        self._level = vbmc_log.get_logger().getEffectiveLevel()
+        vbmc_log.get_logger().setLevel(logging.DEBUG)
+        self.addCleanup(lambda level: vbmc_log.get_logger().setLevel(level),
+                        self._level)