Add a basic test framework for oslo.metrics

Add a noop test as a basic test framework.
Properly comment out the bandit line to not give the impression that
it's actually tested (it was misconfigured before).

Change-Id: Ic2278816d50ec0fa628f6616839f8b9dc0a5c299

.stestr.conf

+[DEFAULT]
+test_path=./oslo_metrics/tests
+top_path=./

oslo_metrics/tests/test_noop.py

+# -*- coding: utf-8 -*-
+
+# 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.
+
+"""
+test_noop
+----------------------------------
+A test that always reports success.
+"""
+
+from oslotest import base
+
+
+class TestNoop(base.BaseTestCase):
+
+    def setUp(self):
+        super(TestNoop, self).setUp()
+
+    def test_always_success(self):
+        self.assertEqual(1, 1)

tox.ini

@@ -10,17 +10,16 @@ whitelist_externals =
 deps =
   -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
   -r{toxinidir}/test-requirements.txt
-# NOTE(hberaud): Not yet activated
-#commands =
-#  find . -type f -name "*.pyc" -delete
-#  stestr run --slowest {posargs}
+commands =
+  find . -type f -name "*.pyc" -delete
+  stestr run --slowest {posargs}
 
 [testenv:pep8]
 deps = {[testenv]deps}
 commands =
   flake8
-  # Run security linter
-  bandit -r oslo_cache -x tests -n5
+  # Run security linter (deactivated as it fails on tmpdir issue right now)
+  # bandit -r oslo_metrics -x tests -n5
 
 [testenv:venv]
 commands = {posargs}