chore: unused import

lib/game/components/controlled_multiball.dart

@@ -41,9 +41,9 @@ class MultiballController extends ComponentController<MultiballGroup>
 
   @override
   void onNewState(GameState state) {
-    final isMultiball = state.bonusHistory.contains(GameBonus.dashNest);
+    final hasMultiball = state.bonusHistory.contains(GameBonus.dashNest);
 
-    if (isMultiball) {
+    if (hasMultiball) {
       component.children.whereType<Multiball>().forEach((element) {
         element.animate();
       });

packages/pinball_components/test/src/components/multiball_test.dart

@@ -22,31 +22,63 @@ void main() {
   final flameTester = FlameTester(() => TestGame(assets));
 
   group('Multiball', () {
-    flameTester.test('"a" loads correctly', (game) async {
+    group('loads correctly', () {
+      flameTester.test('"a"', (game) async {
         final multiball = Multiball.a();
         await game.ensureAdd(multiball);
 
         expect(game.contains(multiball), isTrue);
       });
 
-    flameTester.test('"b" loads correctly', (game) async {
+      flameTester.test('"b"', (game) async {
         final multiball = Multiball.b();
         await game.ensureAdd(multiball);
         expect(game.contains(multiball), isTrue);
       });
 
-    flameTester.test('"c" loads correctly', (game) async {
+      flameTester.test('"c"', (game) async {
         final multiball = Multiball.c();
         await game.ensureAdd(multiball);
 
         expect(game.contains(multiball), isTrue);
       });
 
-    flameTester.test('"d" loads correctly', (game) async {
+      flameTester.test('"d"', (game) async {
         final multiball = Multiball.d();
         await game.ensureAdd(multiball);
         expect(game.contains(multiball), isTrue);
       });
+    });
+
+    group('renders correctly', () {
+      flameTester.testGameWidget(
+        "'a'",
+        setUp: (game, tester) async {
+          await game.images.loadAll(assets);
+          final multiball = Multiball.d();
+          await game.ensureAdd(multiball);
+
+          multiball.animate();
+          await tester.pump();
+
+          expect(
+            multiball.children
+                .whereType<MultiballSpriteGroupComponent>()
+                .first
+                .current,
+            MultiballSpriteState.active,
+          );
+
+          game.camera.followVector2(Vector2.zero());
+        },
+        verify: (game, tester) async {
+          await expectLater(
+            find.byGame<TestGame>(),
+            matchesGoldenFile('golden/multiball/a-active.png'),
+          );
+        },
+      );
+    });
 
     flameTester.test('animate switches between on and off sprites',
         (game) async {

test/game/components/controlled_multiball_test.dart

@@ -2,7 +2,6 @@
 
 import 'package:flame_test/flame_test.dart';
 import 'package:flutter_test/flutter_test.dart';
-import 'package:mocktail/mocktail.dart';
 import 'package:pinball/game/game.dart';
 import 'package:pinball_components/pinball_components.dart';