more merge testing

src/game.rs

@@ -802,6 +802,7 @@ mod test {
     use crate::game::{Version, Game};
     use crate::text::{TextDirection, Font};
     use crate::tile::Tile;
+    use crate::room::Room;
 
     #[test]
     fn test_game_from_string() {
@@ -920,5 +921,17 @@ mod test {
             game.get_room_by_id("1".to_string()).unwrap().palette_id,
             Some("1".to_string())
         );
+
+        // test sprites in non-zero rooms in merged game
+        let mut game_a = crate::mock::game_default();
+        let mut game_b = crate::mock::game_default();
+        let mut room = crate::mock::room();
+        let mut sprite = crate::mock::sprite();
+        let room_id = "2".to_string();
+        room.id = room_id.clone();
+        sprite.room_id = Some(room_id.clone());
+        game_b.add_sprite(sprite);
+        game_a.merge(game_b);
+        assert_eq!(game_a.get_sprite_by_id("2".to_string()).unwrap().room_id, Some(room_id));
     }
 }