chore: little code refactor, doc

lib/game/components/controlled_multiplier.dart

@@ -1,3 +1,5 @@
+// ignore_for_file: public_member_api_docs
+
 import 'dart:math' as math;
 import 'package:flame/components.dart';
 import 'package:flame_bloc/flame_bloc.dart';
@@ -9,60 +11,51 @@ import 'package:pinball_flame/pinball_flame.dart';
 /// {@template multipliers_group_component}
 /// A [SpriteGroupComponent] for the multiplier over the board.
 /// {@endtemplate}
-class MultipliersGroup extends Component
+class Multipliers extends Component
     with Controls<MultipliersController>, HasGameRef<PinballGame> {
   /// {@macro multipliers_group_component}
-  MultipliersGroup() : super() {
-    controller = MultipliersController(this);
-  }
-
-  /// Multiplier x2.
-  late final Multiplier x2multiplier;
-
-  /// Multiplier x3.
-  late final Multiplier x3multiplier;
-
-  /// Multiplier x4.
-  late final Multiplier x4multiplier;
-
-  /// Multiplier x5.
-  late final Multiplier x5multiplier;
-
-  /// Multiplier x6.
-  late final Multiplier x6multiplier;
-
-  @override
-  Future<void> onLoad() async {
-    await super.onLoad();
-
-    x2multiplier = Multiplier(
+  Multipliers()
+      : x2multiplier = Multiplier(
           value: 2,
           position: Vector2(-19.5, -2),
           rotation: -15 * math.pi / 180,
-    );
-
+        ),
         x3multiplier = Multiplier(
           value: 3,
           position: Vector2(13, -9.5),
           rotation: 15 * math.pi / 180,
-    );
-
+        ),
         x4multiplier = Multiplier(
           value: 4,
           position: Vector2(0, -21),
-    );
-
+        ),
         x5multiplier = Multiplier(
           value: 5,
           position: Vector2(-8.5, -28),
           rotation: -3 * math.pi / 180,
-    );
-
+        ),
         x6multiplier = Multiplier(
           value: 6,
           position: Vector2(10, -31),
           rotation: 8 * math.pi / 180,
-    );
+        ),
+        super() {
+    controller = MultipliersController(this);
+  }
+
+  final Multiplier x2multiplier;
+
+  final Multiplier x3multiplier;
+
+  final Multiplier x4multiplier;
+
+  final Multiplier x5multiplier;
+
+  final Multiplier x6multiplier;
+
+  @override
+  Future<void> onLoad() async {
+    await super.onLoad();
 
     await addAll([
       x2multiplier,
@@ -75,15 +68,14 @@ class MultipliersGroup extends Component
 }
 
 /// {@template multipliers_controller}
-/// Controller attached to a [MultipliersGroup] that handles its game related
+/// Controller attached to a [Multipliers] that handles its game related
 /// logic.
 /// {@endtemplate}
 @visibleForTesting
-class MultipliersController extends ComponentController<MultipliersGroup>
+class MultipliersController extends ComponentController<Multipliers>
     with BlocComponent<GameBloc, GameState>, HasGameRef<PinballGame> {
   /// {@macro multipliers_controller}
-  MultipliersController(MultipliersGroup multipliersGroup)
-      : super(multipliersGroup);
+  MultipliersController(Multipliers multipliersGroup) : super(multipliersGroup);
 
   @override
   bool listenWhen(GameState? previousState, GameState newState) {

lib/game/pinball_game.dart

@@ -55,7 +55,7 @@ class PinballGame extends Forge2DGame
     final launcher = Launcher();
     unawaited(addFromBlueprint(launcher));
     unawaited(add(Board()));
-    unawaited(add(MultipliersGroup()));
+    unawaited(add(Multipliers()));
     unawaited(add(AlienZone()));
     await addFromBlueprint(SparkyFireZone());
     unawaited(addFromBlueprint(Slingshots()));

test/game/components/controlled_multiplier_test.dart

@@ -28,7 +28,7 @@ void main() {
     flameTester.test(
       'loads correctly',
       (game) async {
-        final multipliersGroup = MultipliersGroup();
+        final multipliersGroup = Multipliers();
         await game.ensureAdd(multipliersGroup);
 
         expect(game.contains(multipliersGroup), isTrue);
@@ -39,7 +39,7 @@ void main() {
       flameTester.test(
         'five Multiplier',
         (game) async {
-          final multipliersGroup = MultipliersGroup();
+          final multipliersGroup = Multipliers();
           await game.ensureAdd(multipliersGroup);
 
           expect(
@@ -60,7 +60,7 @@ void main() {
             const previous = GameState.initial();
             final state = previous.copyWith(score: 100);
 
-            final multipliersGroup = MultipliersGroup();
+            final multipliersGroup = Multipliers();
             await game.ensureAdd(multipliersGroup);
 
             expect(
@@ -75,7 +75,7 @@ void main() {
           (game) async {
             const previous = GameState.initial();
 
-            final multipliersGroup = MultipliersGroup();
+            final multipliersGroup = Multipliers();
             await game.ensureAdd(multipliersGroup);
 
             expect(

test/helpers/mocks.dart

@@ -88,4 +88,4 @@ class MockSparkyBumper extends Mock implements SparkyBumper {}
 
 class MockMultiplier extends Mock implements Multiplier {}
 
-class MockMultipliersGroup extends Mock implements MultipliersGroup {}
+class MockMultipliersGroup extends Mock implements Multipliers {}