Basic testcase setup

tests/tests.py

@@ -0,0 +1,15 @@
+import unittest
+from unittest import mock
+
+from restic_volume_backup import utils
+
+
+def list_containers():
+    return {}
+
+
+@mock.patch('restic_volume_backup.utils.list_containers', list_containers)
+class ResticBackupTests(unittest.TestCase):
+
+    def test_stuff(self):
+        assert utils.list_containers() == {}