Basic test passing

tests/tests.py

@@ -1,15 +1,43 @@
+import json
+import os
 import unittest
 from unittest import mock
 
 from restic_volume_backup import utils
+import fixtures
 
+list_containers_func = 'restic_volume_backup.utils.list_containers'
 
-def list_containers():
-    return {}
-
-
-@mock.patch('restic_volume_backup.utils.list_containers', list_containers)
 class ResticBackupTests(unittest.TestCase):
 
+    @classmethod
+    def setUpClass(cls):
+        """Set up basic enviroment variables"""
+        os.environ['RESTIC_REPOSITORY'] = "test"
+        os.environ['RESTIC_PASSWORD'] = "password"
+
     def test_stuff(self):
-        assert utils.list_containers() == {}
+        containers = [
+            {
+                'service': 'web',
+                'labels': {
+                    'moo': 1,
+                },
+                'mounts': [{
+                    'Source': 'moo',
+                    'Destination': 'moo',
+                    'Type': 'bind',
+                }]
+            },
+            {
+                'service': 'mysql',
+            },
+            {
+                'service': 'postgres',
+            },
+        ]
+
+        with mock.patch(list_containers_func, fixtures.containers(containers=containers)):
+            test = utils.list_containers()
+
+        # raise ValueError(json.dumps(test, indent=2))