test: fix NFO workflow and background loader tests

- Add missing TMDB async mock methods (_ensure_session, close)
  to all TMDB mocks in test_nfo_workflow.py
- Refactor test_anime_add_nfo_isolation.py to mock get_nfo_factory()
  instead of asserting on series_app.nfo_service directly
- Patch get_nfo_factory in test_background_loader_service.py
  to align with factory-based NFOService creation

Fixes test failures caused by NFOService refactoring that introduced
explicit TMDB session lifecycle and NFO factory pattern.

tests/integration/test_anime_add_nfo_isolation.py

@@ -91,6 +91,13 @@ def _setup_loader_mocks(loader_service):
     loader_service._broadcast_status = AsyncMock()
 
 
+def _mock_nfo_factory(mock_nfo_service):
+    """Create a mock NFO factory that returns the given mock service."""
+    mock_factory = MagicMock()
+    mock_factory.create = MagicMock(return_value=mock_nfo_service)
+    return mock_factory
+
+
 @pytest.mark.asyncio
 async def test_add_anime_loads_nfo_only_for_new_anime(
     temp_anime_dir,
@@ -112,6 +119,12 @@ async def test_add_anime_loads_nfo_only_for_new_anime(
     )
     _setup_loader_mocks(loader_service)
 
+    # Set up mock NFO service via factory
+    mock_nfo_service = AsyncMock()
+    mock_nfo_service.create_tvshow_nfo = AsyncMock(return_value="/anime/New Anime (2024)/tvshow.nfo")
+    mock_factory = _mock_nfo_factory(mock_nfo_service)
+
+    with patch("src.server.services.background_loader_service.get_nfo_factory", return_value=mock_factory):
         await loader_service.start()
 
         try:
@@ -132,9 +145,9 @@ async def test_add_anime_loads_nfo_only_for_new_anime(
 
             await asyncio.sleep(1.0)
 
-        assert mock_series_app.nfo_service.create_tvshow_nfo.call_count == 1
+            assert mock_nfo_service.create_tvshow_nfo.call_count == 1
 
-        call_args = mock_series_app.nfo_service.create_tvshow_nfo.call_args
+            call_args = mock_nfo_service.create_tvshow_nfo.call_args
             assert call_args is not None
 
             kwargs = call_args.kwargs
@@ -145,7 +158,7 @@ async def test_add_anime_loads_nfo_only_for_new_anime(
             assert kwargs["download_logo"] is True
             assert kwargs["download_fanart"] is True
 
-        all_calls = mock_series_app.nfo_service.create_tvshow_nfo.call_args_list
+            all_calls = mock_nfo_service.create_tvshow_nfo.call_args_list
             for call_obj in all_calls:
                 call_kwargs = call_obj.kwargs
                 assert call_kwargs["serie_name"] != "Existing Anime 1"
@@ -216,6 +229,12 @@ async def test_multiple_anime_added_each_loads_independently(
     )
     _setup_loader_mocks(loader_service)
 
+    # Set up mock NFO service via factory
+    mock_nfo_service = AsyncMock()
+    mock_nfo_service.create_tvshow_nfo = AsyncMock(return_value="/anime/tvshow.nfo")
+    mock_factory = _mock_nfo_factory(mock_nfo_service)
+
+    with patch("src.server.services.background_loader_service.get_nfo_factory", return_value=mock_factory):
         await loader_service.start()
 
         try:
@@ -238,9 +257,9 @@ async def test_multiple_anime_added_each_loads_independently(
 
             await asyncio.sleep(2.0)
 
-        assert mock_series_app.nfo_service.create_tvshow_nfo.call_count == 3
+            assert mock_nfo_service.create_tvshow_nfo.call_count == 3
 
-        all_calls = mock_series_app.nfo_service.create_tvshow_nfo.call_args_list
+            all_calls = mock_nfo_service.create_tvshow_nfo.call_args_list
 
             called_names = [call_obj.kwargs["serie_name"] for call_obj in all_calls]
             called_folders = [call_obj.kwargs["serie_folder"] for call_obj in all_calls]
@@ -275,6 +294,12 @@ async def test_nfo_service_receives_correct_parameters(
     )
     _setup_loader_mocks(loader_service)
 
+    # Set up mock NFO service via factory
+    mock_nfo_service = AsyncMock()
+    mock_nfo_service.create_tvshow_nfo = AsyncMock(return_value="/anime/Test Anime Series (2024)/tvshow.nfo")
+    mock_factory = _mock_nfo_factory(mock_nfo_service)
+
+    with patch("src.server.services.background_loader_service.get_nfo_factory", return_value=mock_factory):
         await loader_service.start()
 
         try:
@@ -295,9 +320,9 @@ async def test_nfo_service_receives_correct_parameters(
 
             await asyncio.sleep(1.0)
 
-        assert mock_series_app.nfo_service.create_tvshow_nfo.call_count == 1
+            assert mock_nfo_service.create_tvshow_nfo.call_count == 1
 
-        call_kwargs = mock_series_app.nfo_service.create_tvshow_nfo.call_args.kwargs
+            call_kwargs = mock_nfo_service.create_tvshow_nfo.call_args.kwargs
 
             assert call_kwargs["serie_name"] == test_name
             assert call_kwargs["serie_folder"] == test_folder

tests/integration/test_nfo_workflow.py

@@ -96,6 +96,8 @@ class TestCompleteNFOWorkflow:
             mock_tmdb = Mock()
             mock_tmdb.__aenter__ = AsyncMock(return_value=mock_tmdb)
             mock_tmdb.__aexit__ = AsyncMock(return_value=None)
+            mock_tmdb._ensure_session = AsyncMock()
+            mock_tmdb.close = AsyncMock()
             mock_tmdb.search_tv_show = AsyncMock(return_value={"results": [mock_tmdb_show]})
             mock_tmdb.get_tv_show = AsyncMock(return_value=mock_tmdb_show)
             mock_tmdb.get_tv_show_details = AsyncMock(return_value=mock_tmdb_show)
@@ -158,6 +160,8 @@ class TestCompleteNFOWorkflow:
             mock_tmdb = Mock()
             mock_tmdb.__aenter__ = AsyncMock(return_value=mock_tmdb)
             mock_tmdb.__aexit__ = AsyncMock(return_value=None)
+            mock_tmdb._ensure_session = AsyncMock()
+            mock_tmdb.close = AsyncMock()
             mock_tmdb.search_tv_show = AsyncMock(
                 return_value={"results": [{
                     "id": 999,
@@ -208,6 +212,8 @@ class TestCompleteNFOWorkflow:
             mock_tmdb = Mock()
             mock_tmdb.__aenter__ = AsyncMock(return_value=mock_tmdb)
             mock_tmdb.__aexit__ = AsyncMock(return_value=None)
+            mock_tmdb._ensure_session = AsyncMock()
+            mock_tmdb.close = AsyncMock()
             mock_tmdb.search_tv_show = AsyncMock(
                 side_effect=TMDBAPIError("API error")
             )
@@ -253,6 +259,8 @@ class TestCompleteNFOWorkflow:
             mock_tmdb = Mock()
             mock_tmdb.__aenter__ = AsyncMock(return_value=mock_tmdb)
             mock_tmdb.__aexit__ = AsyncMock(return_value=None)
+            mock_tmdb._ensure_session = AsyncMock()
+            mock_tmdb.close = AsyncMock()
             mock_tmdb.search_tv_show = AsyncMock(
                 return_value={"results": [{
                     "id": 999,
@@ -307,16 +315,22 @@ class TestCompleteNFOWorkflow:
             mock_tmdb = Mock()
             mock_tmdb.__aenter__ = AsyncMock(return_value=mock_tmdb)
             mock_tmdb.__aexit__ = AsyncMock(return_value=None)
+            mock_tmdb._ensure_session = AsyncMock()
+            mock_tmdb.close = AsyncMock()
             mock_tmdb.search_tv_show = AsyncMock(
                 side_effect=[
                     {"results": [{"id": 1, "name": "Anime 1", "first_air_date": "2020-01-01"}]},
                     {"results": [{"id": 2, "name": "Anime 2", "first_air_date": "2021-01-01"}]},
+                    {"results": [{"id": 1, "name": "Anime 1", "first_air_date": "2020-01-01"}]},
+                    {"results": [{"id": 2, "name": "Anime 2", "first_air_date": "2021-01-01"}]},
                 ]
             )
             mock_tmdb.get_tv_show_details = AsyncMock(
                 side_effect=[
                     {"id": 1, "name": "Anime 1", "first_air_date": "2020-01-01"},
                     {"id": 2, "name": "Anime 2", "first_air_date": "2021-01-01"},
+                    {"id": 1, "name": "Anime 1", "first_air_date": "2020-01-01"},
+                    {"id": 2, "name": "Anime 2", "first_air_date": "2021-01-01"},
                 ]
             )
             mock_tmdb.get_tv_show_content_ratings = AsyncMock(return_value={"results": []})
@@ -366,6 +380,8 @@ class TestNFOWorkflowWithDownloads:
             mock_tmdb = Mock()
             mock_tmdb.__aenter__ = AsyncMock(return_value=mock_tmdb)
             mock_tmdb.__aexit__ = AsyncMock(return_value=None)
+            mock_tmdb._ensure_session = AsyncMock()
+            mock_tmdb.close = AsyncMock()
             mock_tmdb.search_tv_show = AsyncMock(
                 return_value={"results": [{
                     "id": 999,

tests/unit/test_background_loader_service.py

@@ -528,7 +528,13 @@ class TestLoadNfoAndImages:
             year=2020
         )
 
-        with patch("src.server.database.service.AnimeSeriesService") as mock_service_class:
+        mock_nfo_service = AsyncMock()
+        mock_nfo_service.create_tvshow_nfo = AsyncMock(return_value="/anime/test_folder/tvshow.nfo")
+        mock_factory = MagicMock()
+        mock_factory.create = MagicMock(return_value=mock_nfo_service)
+
+        with patch("src.server.database.service.AnimeSeriesService") as mock_service_class, \
+             patch("src.server.services.background_loader_service.get_nfo_factory", return_value=mock_factory):
             mock_service_class.get_by_key = AsyncMock(return_value=mock_series)
 
             result = await background_loader_service._load_nfo_and_images(task, mock_db)