test: fixing tests for BallAdded

lib/game/pinball_game.dart

@@ -99,9 +99,6 @@ class _GameBallsController extends ComponentController<PinballGame>
 
   @override
   bool listenWhen(GameState? previousState, GameState newState) {
-    //final noBallsLeft = component.descendants().whereType<Ball>().isEmpty;
-    //final canBallRespawn = newState.balls > 0;
-
     final noBallsLeft = newState.balls == 0;
     final canBallRespawn = newState.rounds > 0;
 
@@ -183,15 +180,6 @@ class DebugPinballGame extends PinballGame with FPSCounter, TapDetector {
 
 class _DebugGameBallsController extends _GameBallsController {
   _DebugGameBallsController(PinballGame game) : super(game);
-
-  @override
-  bool listenWhen(GameState? previousState, GameState newState) {
-    final noBallsLeft =
-        component.descendants().whereType<ControlledBall>().isEmpty;
-    final canBallRespawn = newState.balls > 0;
-
-    return noBallsLeft && canBallRespawn;
-  }
 }
 
 class _DebugInformation extends Component with HasGameRef<DebugPinballGame> {

test/game/pinball_game_test.dart

@@ -103,20 +103,20 @@ void main() {
       );
 
       group('controller', () {
-        // TODO(alestiago): Write test to be controller agnostic.
-        group('listenWhen', () {
         late GameBloc gameBloc;
 
         setUp(() {
           gameBloc = GameBloc();
         });
 
-          final flameBlocTester = FlameBlocTester<PinballGame, GameBloc>(
+        final flameBlocTester = FlameBlocTester<PinballTestGame, GameBloc>(
-            gameBuilder: EmptyPinballTestGame.new,
+          gameBuilder: PinballTestGame.new,
           blocBuilder: () => gameBloc,
-            // assets: assets,
+          assets: assets,
         );
 
+        // TODO(alestiago): Write test to be controller agnostic.
+        group('listenWhen', () {
           flameBlocTester.testGameWidget(
             'listens when all balls are lost and there are more than 0 balls',
             setUp: (game, tester) async {