fix(qbittorrent): preserve torrent metadata in incremental updates

backend/tests/test_qbittorrent_client.py

@@ -125,13 +125,21 @@ class QbittorrentClientTests(unittest.TestCase):
             "rid": 10,
             "full_update": True,
             "server_state": {"dl_info_speed": 100},
-            "torrents": {"a": {"name": "A", "state": "downloading"}},
+            "torrents": {
+                "a": {
+                    "name": "A",
+                    "state": "downloading",
+                    "size": 1_024,
+                    "progress": 0.5,
+                    "dlspeed": 100,
+                }
+            },
         }
         partial = {
             "rid": 11,
             "full_update": False,
             "server_state": {"dl_info_speed": 200},
-            "torrents": {"a": {"name": "A", "state": "pausedDL"}},
+            "torrents": {"a": {"dlspeed": 200}},
         }
         self.session.get.side_effect = [self._get_response(full), self._get_response(partial)]
 
@@ -143,7 +151,11 @@ class QbittorrentClientTests(unittest.TestCase):
         r2 = self.client.maindata()
         self.assertEqual(self.session.get.call_args_list[1].kwargs["params"].get("rid"), 10)
         self.assertEqual(r2["server_state"]["dl_info_speed"], 200)  # merged
-        self.assertEqual(r2["torrents"]["a"]["state"], "pausedDL")  # merged
+        self.assertEqual(r2["torrents"]["a"]["dlspeed"], 200)
+        self.assertEqual(r2["torrents"]["a"]["name"], "A")
+        self.assertEqual(r2["torrents"]["a"]["state"], "downloading")
+        self.assertEqual(r2["torrents"]["a"]["size"], 1_024)
+        self.assertEqual(r2["torrents"]["a"]["progress"], 0.5)
 
     def test_maindata_caches_concurrent_calls_within_ttl(self) -> None:
         """Two calls within the TTL collapse to a single HTTP fetch."""
@@ -227,8 +239,8 @@ class QbittorrentClientTests(unittest.TestCase):
         self.session.post.return_value = self._login_response()
         self.client._login()
         call_kwargs = self.session.post.call_args.kwargs
-        assert call_kwargs["timeout"] == (5.0, 5.0)
-        assert not isinstance(call_kwargs["timeout"], int)
+        self.assertEqual(call_kwargs["timeout"], (5.0, 5.0))
+        self.assertNotIsInstance(call_kwargs["timeout"], int)
 
     def test_login_fails_message_names_bad_credentials(self) -> None:
         """'Fails.' body yields a clear 'invalid username or password' error."""