fix: precache images

lib/game/view/pinball_game_page.dart

@@ -44,7 +44,7 @@ class PinballGamePage extends StatelessWidget {
       ...game.preLoadAssets(),
       pinballAudio.load(),
       ...BonusAnimation.loadAssets(),
-      ...SelectedCharacter.loadAssets(),
+      ...SelectedCharacter.loadAssets(context),
       ...StarAnimation.loadAssets(),
     ];
 

lib/select_character/widgets/selected_character.dart

@@ -24,7 +24,7 @@ class SelectedCharacter extends StatefulWidget {
   State<SelectedCharacter> createState() => _SelectedCharacterState();
 
   /// Returns a list of assets to be loaded.
-  static List<Future> loadAssets() {
+  static List<Future> loadAssets(BuildContext context) {
     Flame.images.prefix = '';
 
     const dashTheme = DashTheme();
@@ -41,6 +41,10 @@ class SelectedCharacter extends StatefulWidget {
       Flame.images.load(androidTheme.background.keyName),
       Flame.images.load(dinoTheme.background.keyName),
       Flame.images.load(sparkyTheme.background.keyName),
+      precacheImage(AssetImage(dashTheme.background.keyName), context),
+      precacheImage(AssetImage(androidTheme.background.keyName), context),
+      precacheImage(AssetImage(dinoTheme.background.keyName), context),
+      precacheImage(AssetImage(sparkyTheme.background.keyName), context),
     ];
   }
 }

test/select_character/widgets/selected_character_test.dart

@@ -2,13 +2,17 @@
 
 import 'package:bloc_test/bloc_test.dart';
 import 'package:flame/flame.dart';
+import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:mocktail/mocktail.dart';
 import 'package:pinball/select_character/select_character.dart';
 import 'package:pinball_flame/pinball_flame.dart';
 import 'package:pinball_theme/pinball_theme.dart';
 
 import '../../helpers/helpers.dart';
 
+class MockBuildContext extends Mock implements BuildContext {}
+
 void main() {
   TestWidgetsFlutterBinding.ensureInitialized();
 
@@ -31,7 +35,7 @@ void main() {
 
   group('SelectedCharacter', () {
     testWidgets('loadAssets method returns list of futures', (tester) async {
-      expect(SelectedCharacter.loadAssets(), isList);
+      expect(SelectedCharacter.loadAssets(MockBuildContext()), isList);
     });
 
     testWidgets('renders selected character', (tester) async {