feat: adding tests

lib/game/components/ball.dart

@@ -7,13 +7,12 @@ class Ball extends PositionBodyComponent<PinballGame, SpriteComponent>
     with BlocComponent<GameBloc, GameState> {
   Ball({
     required Vector2 position,
-    required Vector2 size,
   })  : _position = position,
-        _size = size,
-        super(size: size);
+        super(size: ballSize);
+
+  static final ballSize = Vector2.all(2);
 
   final Vector2 _position;
-  final Vector2 _size;
 
   static const spritePath = 'components/ball.png';
 
@@ -21,12 +20,12 @@ class Ball extends PositionBodyComponent<PinballGame, SpriteComponent>
   Future<void> onLoad() async {
     await super.onLoad();
     final sprite = await gameRef.loadSprite(spritePath);
-    positionComponent = SpriteComponent(sprite: sprite, size: _size);
+    positionComponent = SpriteComponent(sprite: sprite, size: ballSize);
   }
 
   @override
   Body createBody() {
-    final shape = CircleShape()..radius = _size.x / 2;
+    final shape = CircleShape()..radius = ballSize.x / 2;
 
     final fixtureDef = FixtureDef(shape)..density = 1;
 

lib/game/game_assets.dart

@@ -2,7 +2,6 @@ import 'package:pinball/game/game.dart';
 
 /// Add methods to help loading and caching game assets
 extension PinballGameAssetsX on PinballGame {
-
   /// Pre load the initial assets of the game
   Future<void> preLoadAssets() async {
     await Future.wait([

lib/game/pinball_game.dart

@@ -1,3 +1,5 @@
+import 'dart:async';
+
 import 'package:flame_bloc/flame_bloc.dart';
 import 'package:flame_forge2d/flame_forge2d.dart';
 import 'package:pinball/game/game.dart';
@@ -5,10 +7,7 @@ import 'package:pinball/game/game.dart';
 class PinballGame extends Forge2DGame with FlameBloc {
   void spawnBall() {
     add(
-      Ball(
-        position: ballStartingPosition,
-        size: Vector2.all(4),
-      ),
+      Ball(position: ballStartingPosition),
     );
   }
 
@@ -23,8 +22,6 @@ class PinballGame extends Forge2DGame with FlameBloc {
 
   @override
   Future<void> onLoad() async {
-    await preLoadAssets();
-
     addContactCallback(BallScorePointsCallback());
 
     await add(BottomWall(this));

lib/game/view/pinball_game_page.dart

@@ -23,9 +23,26 @@ class PinballGamePage extends StatelessWidget {
   }
 }
 
-class PinballGameView extends StatelessWidget {
+class PinballGameView extends StatefulWidget {
   const PinballGameView({Key? key}) : super(key: key);
 
+  @override
+  State<PinballGameView> createState() => _PinballGameViewState();
+}
+
+class _PinballGameViewState extends State<PinballGameView> {
+  late PinballGame _game;
+
+  @override
+  void initState() {
+    super.initState();
+
+    // TODO(erickzanardo): Revisit this when we start to have more assets
+    // this could expose a Stream (maybe even a cubit?) so we could show the
+    // the loading progress with some fancy widgets.
+    _game = PinballGame()..preLoadAssets();
+  }
+
   @override
   Widget build(BuildContext context) {
     return BlocListener<GameBloc, GameState>(
@@ -39,7 +56,7 @@ class PinballGameView extends StatelessWidget {
           );
         }
       },
-      child: GameWidget<PinballGame>(game: PinballGame()),
+      child: GameWidget<PinballGame>(game: _game),
     );
   }
 }

test/game/components/ball_test.dart

@@ -79,7 +79,7 @@ void main() {
 
           final fixture = ball.body.fixtures[0];
           expect(fixture.shape.shapeType, equals(ShapeType.circle));
-          expect(fixture.shape.radius, equals(2));
+          expect(fixture.shape.radius, equals(1));
         },
       );
     });