test: coverage for multiplier

lib/game/components/controlled_multiplier.dart

@@ -1,6 +1,7 @@
 import 'dart:math' as math;
 import 'package:flame/components.dart';
 import 'package:flame_bloc/flame_bloc.dart';
+import 'package:flutter/material.dart';
 import 'package:pinball/game/game.dart';
 import 'package:pinball_components/pinball_components.dart';
 import 'package:pinball_flame/pinball_flame.dart';
@@ -9,68 +10,74 @@ import 'package:pinball_flame/pinball_flame.dart';
 /// A [SpriteGroupComponent] for the multiplier over the board.
 /// {@endtemplate}
 class MultipliersGroup extends Component
-    with Controls<_MultipliersController>, HasGameRef<PinballGame> {
+    with Controls<MultipliersController>, HasGameRef<PinballGame> {
   /// {@macro multipliers_group_component}
   MultipliersGroup() : super() {
-    controller = _MultipliersController(this);
+    controller = MultipliersController(this);
   }
 
-  late final Multiplier _x2multiplier;
+  late final Multiplier x2multiplier;
 
-  late final Multiplier _x3multiplier;
+  late final Multiplier x3multiplier;
 
-  late final Multiplier _x4multiplier;
+  late final Multiplier x4multiplier;
 
-  late final Multiplier _x5multiplier;
+  late final Multiplier x5multiplier;
 
-  late final Multiplier _x6multiplier;
+  late final Multiplier x6multiplier;
 
   @override
   Future<void> onLoad() async {
     await super.onLoad();
 
-    _x2multiplier = Multiplier(
+    x2multiplier = Multiplier(
       value: 2,
       position: Vector2(-19.5, -2),
       rotation: -15 * math.pi / 180,
     );
 
-    _x3multiplier = Multiplier(
+    x3multiplier = Multiplier(
       value: 3,
       position: Vector2(13, -9.5),
       rotation: 15 * math.pi / 180,
     );
 
-    _x4multiplier = Multiplier(
+    x4multiplier = Multiplier(
       value: 4,
       position: Vector2(0, -21),
     );
 
-    _x5multiplier = Multiplier(
+    x5multiplier = Multiplier(
       value: 5,
       position: Vector2(-8.5, -28),
       rotation: -3 * math.pi / 180,
     );
 
-    _x6multiplier = Multiplier(
+    x6multiplier = Multiplier(
       value: 6,
       position: Vector2(10, -31),
       rotation: 8 * math.pi / 180,
     );
 
     await addAll([
-      _x2multiplier,
-      _x3multiplier,
-      _x4multiplier,
-      _x5multiplier,
-      _x6multiplier,
+      x2multiplier,
+      x3multiplier,
+      x4multiplier,
+      x5multiplier,
+      x6multiplier,
     ]);
   }
 }
 
-class _MultipliersController extends ComponentController<MultipliersGroup>
+/// {@template multipliers_controller}
+/// Controller attached to a [MultipliersGroup] that handles its game related
+/// logic.
+/// {@endtemplate}
+@visibleForTesting
+class MultipliersController extends ComponentController<MultipliersGroup>
     with BlocComponent<GameBloc, GameState>, HasGameRef<PinballGame> {
-  _MultipliersController(MultipliersGroup multipliersGroup)
+  /// {@macro multipliers_controller}
+  MultipliersController(MultipliersGroup multipliersGroup)
       : super(multipliersGroup);
 
   @override
@@ -86,10 +93,10 @@ class _MultipliersController extends ComponentController<MultipliersGroup>
     // https://github.com/VGVentures/pinball/pull/213.
     final currentMultiplier = state.score.bitLength % 6 + 1;
 
-    component._x2multiplier.toggle(currentMultiplier);
-    component._x3multiplier.toggle(currentMultiplier);
-    component._x4multiplier.toggle(currentMultiplier);
-    component._x5multiplier.toggle(currentMultiplier);
-    component._x6multiplier.toggle(currentMultiplier);
+    component.x2multiplier.toggle(currentMultiplier);
+    component.x3multiplier.toggle(currentMultiplier);
+    component.x4multiplier.toggle(currentMultiplier);
+    component.x5multiplier.toggle(currentMultiplier);
+    component.x6multiplier.toggle(currentMultiplier);
   }
 }

test/game/components/controlled_multiplier_test.dart

@@ -2,6 +2,7 @@
 
 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';
 
@@ -84,6 +85,45 @@ void main() {
           },
         );
       });
+
+      group(
+        'onNewState',
+        () {
+          flameTester.test(
+            'toggle multipliers when state changes',
+            (game) async {
+              final multipliersGroup = MockMultipliersGroup();
+              final x2multiplier = MockMultiplier();
+              final x3multiplier = MockMultiplier();
+              final x4multiplier = MockMultiplier();
+              final x5multiplier = MockMultiplier();
+              final x6multiplier = MockMultiplier();
+              final controller = MultipliersController(multipliersGroup);
+              when(() => multipliersGroup.x2multiplier)
+                  .thenReturn(x2multiplier);
+              when(() => multipliersGroup.x3multiplier)
+                  .thenReturn(x3multiplier);
+              when(() => multipliersGroup.x4multiplier)
+                  .thenReturn(x4multiplier);
+              when(() => multipliersGroup.x5multiplier)
+                  .thenReturn(x5multiplier);
+              when(() => multipliersGroup.x6multiplier)
+                  .thenReturn(x6multiplier);
+
+              controller.onNewState(
+                const GameState.initial().copyWith(score: 6),
+              );
+
+              // TODO(ruimiguel): verify toggle with state.multiplier value.
+              verify(() => x2multiplier.toggle(any())).called(1);
+              verify(() => x3multiplier.toggle(any())).called(1);
+              verify(() => x4multiplier.toggle(any())).called(1);
+              verify(() => x5multiplier.toggle(any())).called(1);
+              verify(() => x6multiplier.toggle(any())).called(1);
+            },
+          );
+        },
+      );
     });
   });
 }

test/helpers/mocks.dart

@@ -85,3 +85,7 @@ class MockGameFlowController extends Mock implements GameFlowController {}
 class MockAlienBumper extends Mock implements AlienBumper {}
 
 class MockSparkyBumper extends Mock implements SparkyBumper {}
+
+class MockMultiplier extends Mock implements Multiplier {}
+
+class MockMultipliersGroup extends Mock implements MultipliersGroup {}