test(mediaserver): cover stale tv item id fallback

tests/test_plex_image_lookup.py

@@ -5,12 +5,18 @@ from app.modules.plex.plex import Plex
 
 
 class PlexImageLookupTest(unittest.TestCase):
-    def test_get_remote_image_by_id_uses_item_arts_for_children_key(self):
+    @staticmethod
+    def _build_plex():
+        """构造绕过真实连接的Plex实例，便于单测直接注入plexapi mock。"""
         plex = Plex.__new__(Plex)
         plex._host = "http://192.168.8.254:32400/"
         plex._playhost = None
         plex._token = "plex-token"
         plex._plex = Mock()
+        return plex
+
+    def test_get_remote_image_by_id_uses_item_arts_for_children_key(self):
+        plex = self._build_plex()
         plex._plex.fetchItems.side_effect = AssertionError("should not use raw fetchItems with /children key")
 
         item = Mock()
@@ -31,11 +37,7 @@ class PlexImageLookupTest(unittest.TestCase):
         plex._plex.fetchItem.assert_called_once_with(ekey="/library/metadata/29242/children")
 
     def test_get_remote_image_by_id_falls_back_to_local_art_url(self):
-        plex = Plex.__new__(Plex)
-        plex._host = "http://192.168.8.254:32400/"
-        plex._playhost = None
-        plex._token = "plex-token"
-        plex._plex = Mock()
+        plex = self._build_plex()
 
         item = Mock()
         item.TYPE = "show"