Basic unit tests

tox.ini

@@ -36,6 +36,14 @@ basepython = python2.7
 commands =
     charm-build --log-level DEBUG -o {toxinidir}/build src {posargs}
 
+[testenv:py27]
+basepython = python2.7
+# Reactive source charms are Python3-only, but a py27 unit test target
+# is required by OpenStack Governance.  Remove this shim as soon as
+# permitted.  http://governance.openstack.org/reference/cti/python_cti.html
+whitelist_externals = true
+commands = true
+
 [testenv:py34]
 basepython = python3.4
 deps = -r{toxinidir}/test-requirements.txt

unit_tests/__init__.py

@@ -0,0 +1,38 @@
+# Copyright 2016 Canonical Ltd
+#
+# 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.
+
+import sys
+
+sys.path.append('src')
+sys.path.append('src/lib')
+
+# Mock out charmhelpers so that we can test without it.
+import charms_openstack.test_mocks  # noqa
+charms_openstack.test_mocks.mock_charmhelpers()
+
+
+def mock_more_stuff():
+    charmhelpers = charms_openstack.test_mocks.charmhelpers
+    sys.modules['charmhelpers.contrib.storage'] = (
+        charmhelpers.contrib.storage
+    )
+    sys.modules['charmhelpers.contrib.storage.linux'] = (
+        charmhelpers.contrib.storage.linux
+    )
+    sys.modules['charmhelpers.contrib.storage.linux.ceph'] = (
+        charmhelpers.contrib.storage.linux.ceph
+    )
+
+
+mock_more_stuff()

unit_tests/test_gnocchi_handlers.py

@@ -0,0 +1,83 @@
+# Copyright 2016 Canonical Ltd
+#
+# 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.
+
+from __future__ import absolute_import
+from __future__ import print_function
+
+import mock
+
+import charms_openstack.test_utils as test_utils
+
+import reactive.gnocchi_handlers as handlers
+
+
+class TestRegisteredHooks(test_utils.TestRegisteredHooks):
+
+    def test_hooks(self):
+        defaults = [
+            'charm.installed',
+            'shared-db.connected',
+            'identity-service.connected',
+            'identity-service.available',  # enables SSL support
+            'config.changed',
+            'update-status']
+        hook_set = {
+            'when': {
+                'render_config': (
+                    'coordinator.available',
+                    'shared-db.available',
+                    'identity-service.available',
+                    'storage-ceph.pools.available',
+                ),
+                'init_db': (
+                    'config.rendered',
+                ),
+                'cluster_connected': (
+                    'ha.connected',
+                ),
+                'provide_gnocchi_url': (
+                    'metric-service.connected',
+                ),
+                'configure_ceph': (
+                    'storage-ceph.available',
+                ),
+                'storage_ceph_connected': (
+                    'storage-ceph.connected',
+                ),
+            },
+            'when_not': {
+                'storage_ceph_disconnected': (
+                    'storage-ceph.connected',
+                ),
+            },
+        }
+        # test that the hooks were registered via the
+        # reactive.barbican_handlers
+        self.registered_hooks_test_helper(handlers, hook_set, defaults)
+
+
+class TestRenderStuff(test_utils.PatchHelper):
+
+    def test_render_stuff(self):
+        gnocchi_charm = mock.MagicMock()
+        self.patch_object(handlers.charm, 'provide_charm_instance',
+                          new=mock.MagicMock())
+        self.provide_charm_instance().__enter__.return_value = gnocchi_charm
+        self.provide_charm_instance().__exit__.return_value = None
+        handlers.render_config('arg1', 'arg2')
+        gnocchi_charm.render_with_interfaces.assert_called_once_with(
+            ('arg1', 'arg2')
+        )
+        gnocchi_charm.assess_status.assert_called_once_with()
+        gnocchi_charm.enable_apache2_site.assert_called_once_with()