Add unit test for lib method

unit_tests/test_cinder_backup_handlers.py

@@ -113,4 +113,3 @@ class TestCinderBackupSwiftHandlers(unittest.TestCase):
             for f, args in t.items():
                 # check that function is in patterns
                 self.assertTrue(f in p.keys())
-

unit_tests/test_lib_charm_openstack_cinder_backup_swift.py

@@ -0,0 +1,32 @@
+# Copyright 2019 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 charms_openstack.test_utils as test_utils
+import charm.openstack.cinder_backup_swift as cinder_backup_swift
+
+
+class Helper(test_utils.PatchHelper):
+
+    def setUp(self):
+        super().setUp()
+        self.patch_release(cinder_backup_swift.CinderBackupSwiftCharm.release)
+
+
+class TestCinderBackupSwiftCharm(Helper):
+
+    def test_swift_backup_name(self):
+        c = cinder_backup_swift.CinderBackupSwiftCharm()
+        result = c.get_swift_backup_config()
+        self.assertEqual(result[0], 'cinder-backup')