lastgenre: Adapt test_get_genre function signatures

Author: JOJ0

test/plugins/test_lastgenre.py

@@ -546,13 +546,13 @@ def test_sort_by_depth(self):
 def test_get_genre(config_values, item_genre, mock_genres, expected_result):
     """Test _get_genre with various configurations."""
 
-    def mock_fetch_track_genre(self, obj=None):
+    def mock_fetch_track_genre(self, artist, tracktitle):
         return mock_genres["track"]
 
-    def mock_fetch_album_genre(self, obj):
+    def mock_fetch_album_genre(self, artist, albumtitle):
         return mock_genres["album"]
 
-    def mock_fetch_artist_genre(self, obj):
+    def mock_fetch_artist_genre(self, artist):
         return mock_genres["artist"]
 
     # Mock the last.fm fetchers. When whitelist enabled, we can assume only