Fix linting

Author: StevenLooman

tests/test_didl_lite.py

@@ -707,11 +707,18 @@ def test_from_xml_string_unbound_prefix(self) -> None:
         assert objs[0].sub_title == "Test Subtitle"
         assert isinstance(objs[0], didl_lite.MusicTrack)
 
-def test_music_track_artist_and_genre():
-    from didl_lite.didl_lite import MusicTrack, to_xml_string
-    track = MusicTrack(id="1", parent_id="0", title="Test", restricted="0", artist="My Artist", genre="My Genre")
+    def test_music_track_artist_and_genre(self) -> None:
+        """Test MusicTrack artist and genre properties."""
+        track = didl_lite.MusicTrack(
+            id="1",
+            parent_id="0",
+            title="Test",
+            restricted="0",
+            artist="My Artist",
+            genre="My Genre",
+        )
 
-    xml = to_xml_string(track)
+        xml = didl_lite.to_xml_string(track)
 
-    assert b"<upnp:artist>My Artist</upnp:artist>" in xml
-    assert b"<upnp:genre>My Genre</upnp:genre>" in xml
+        assert b"<upnp:artist>My Artist</upnp:artist>" in xml
+        assert b"<upnp:genre>My Genre</upnp:genre>" in xml