Deliver tested native Alloy and backup recovery sources

tests/test_backup_run.py

@@ -0,0 +1,49 @@
+import json
+from pathlib import Path
+from types import SimpleNamespace
+import unittest
+import tempfile
+from unittest.mock import Mock
+
+from engine import overlay
+
+backup = overlay.load_module(str(Path(__file__).resolve().parents[1] / 'actions/backup/run.py'),
+                             'test_backup_action')
+
+
+class BackupRecovery(unittest.TestCase):
+    def test_failed_attempt_preserves_last_success_and_records_new_failure(self):
+        with tempfile.TemporaryDirectory() as directory:
+            path = Path(directory) / 'status.json'
+            backup.write_backup_status(path, 'success', 100)
+            backup.write_backup_status(path, 'running', 200)
+            backup.write_backup_status(path, 'failed', 210)
+            status = json.loads(path.read_text())
+            self.assertEqual(status['last_success'], 100)
+            self.assertEqual(status['state'], 'failed')
+            self.assertEqual(status['updated_at'], 210)
+
+    def test_recovers_namespace_owner_before_dependent_without_starting_other_containers(self):
+        running = {'komf': False, 'komga': False, 'intentionally-stopped': False}
+        def docker(command, **kwargs):
+            if command[1] == 'inspect':
+                return SimpleNamespace(returncode=0, stdout=json.dumps([
+                    {'Id': name, 'State': {'Running': running[name]}} for name in command[2:]]))
+            name = command[2]
+            if name == 'komf' and not running['komga']:
+                return SimpleNamespace(returncode=1)
+            running[name] = True
+            return SimpleNamespace(returncode=0)
+        ctx = SimpleNamespace(sys=SimpleNamespace(run=docker), log=Mock())
+        backup.restore_containers(ctx, ['komf', 'komga'])
+        self.assertTrue(running['komf'])
+        self.assertTrue(running['komga'])
+        self.assertFalse(running['intentionally-stopped'])
+
+    def test_unrecoverable_container_prevents_success(self):
+        def docker(command, **kwargs):
+            return SimpleNamespace(returncode=0 if command[1] == 'inspect' else 1,
+                                   stdout='[{"Id":"broken","State":{"Running":false}}]')
+        ctx = SimpleNamespace(sys=SimpleNamespace(run=docker), log=Mock())
+        with self.assertRaisesRegex(RuntimeError, 'broken'):
+            backup.restore_containers(ctx, ['broken'])