feat: made BonusWord use InitialPosition

lib/game/components/bonus_word.dart

@@ -74,10 +74,9 @@ class BonusWord extends Component with BlocComponent<GameBloc, GameState> {
       unawaited(
         add(
           BonusLetter(
-            position: _position - Vector2(16 - (i * 6), -30),
             letter: letters[i],
             index: i,
-          ),
+          )..initialPosition = _position - Vector2(16 - (i * 6), -30),
         ),
       );
     }
@@ -89,14 +88,12 @@ class BonusWord extends Component with BlocComponent<GameBloc, GameState> {
 /// which will activate its letter after contact with a [Ball].
 /// {@endtemplate}
 class BonusLetter extends BodyComponent<PinballGame>
-    with BlocComponent<GameBloc, GameState> {
+    with BlocComponent<GameBloc, GameState>, InitialPosition {
   /// {@macro bonus_letter}
   BonusLetter({
-    required Vector2 position,
     required String letter,
     required int index,
-  })  : _position = position,
-        _letter = letter,
+  })  : _letter = letter,
         _index = index {
     paint = Paint()..color = _disableColor;
   }
@@ -107,7 +104,6 @@ class BonusLetter extends BodyComponent<PinballGame>
   static const _activeColor = Colors.green;
   static const _disableColor = Colors.red;
 
-  final Vector2 _position;
   final String _letter;
   final int _index;
 
@@ -134,7 +130,7 @@ class BonusLetter extends BodyComponent<PinballGame>
 
     final bodyDef = BodyDef()
       ..userData = this
-      ..position = _position
+      ..position = initialPosition
       ..type = BodyType.static;
 
     return world.createBody(bodyDef)..createFixture(fixtureDef);

test/game/components/bonus_word_test.dart

@@ -123,10 +123,9 @@ void main() {
       'loads correctly',
       (game) async {
         final bonusLetter = BonusLetter(
-          position: Vector2.zero(),
           letter: 'G',
           index: 0,
-        );
+        )..initialPosition = Vector2.zero();
         await game.ensureAdd(bonusLetter);
         await game.ready();
 
@@ -140,10 +139,9 @@ void main() {
         (game) async {
           final position = Vector2.all(10);
           final bonusLetter = BonusLetter(
-            position: position,
             letter: 'G',
             index: 0,
-          );
+          )..initialPosition = position;
           await game.ensureAdd(bonusLetter);
           game.contains(bonusLetter);
 
@@ -155,10 +153,9 @@ void main() {
         'is static',
         (game) async {
           final bonusLetter = BonusLetter(
-            position: Vector2.zero(),
             letter: 'G',
             index: 0,
-          );
+          )..initialPosition = Vector2.zero();
           await game.ensureAdd(bonusLetter);
 
           expect(bonusLetter.body.bodyType, equals(BodyType.static));
@@ -171,10 +168,9 @@ void main() {
         'exists',
         (game) async {
           final bonusLetter = BonusLetter(
-            position: Vector2.zero(),
             letter: 'G',
             index: 0,
-          );
+          )..initialPosition = Vector2.zero();
           await game.ensureAdd(bonusLetter);
 
           expect(bonusLetter.body.fixtures[0], isA<Fixture>());
@@ -185,10 +181,9 @@ void main() {
         'is sensor',
         (game) async {
           final bonusLetter = BonusLetter(
-            position: Vector2.zero(),
             letter: 'G',
             index: 0,
-          );
+          )..initialPosition = Vector2.zero();
           await game.ensureAdd(bonusLetter);
 
           final fixture = bonusLetter.body.fixtures[0];
@@ -200,10 +195,9 @@ void main() {
         'shape is circular',
         (game) async {
           final bonusLetter = BonusLetter(
-            position: Vector2.zero(),
             letter: 'G',
             index: 0,
-          );
+          )..initialPosition = Vector2.zero();
           await game.ensureAdd(bonusLetter);
 
           final fixture = bonusLetter.body.fixtures[0];