test: fixed some tests for ramp

packages/pinball_components/lib/src/components/spaceship_ramp/spaceship_ramp.dart

@@ -395,7 +395,6 @@ class _SpaceshipRampOpening extends LayerSensor {
 /// Small sensor body used to detect when a ball has entered the
 /// [SpaceshipRamp].
 /// {@endtemplate}
-@visibleForTesting
 class RampSensor extends BodyComponent
     with ParentIsA<SpaceshipRamp>, InitialPosition, Layered {
   /// {@macro ramp_sensor}

packages/pinball_components/test/src/components/spaceship_ramp/spaceship_ramp_test.dart

@@ -0,0 +1,49 @@
+// ignore_for_file: cascade_invocations
+
+import 'package:bloc_test/bloc_test.dart';
+import 'package:flame/components.dart';
+import 'package:flame_test/flame_test.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:mocktail/mocktail.dart';
+import 'package:pinball_components/pinball_components.dart';
+import 'package:pinball_components/src/components/android_bumper/behaviors/behaviors.dart';
+import 'package:pinball_components/src/components/bumping_behavior.dart';
+
+import '../../../helpers/helpers.dart';
+
+void main() {
+  TestWidgetsFlutterBinding.ensureInitialized();
+  final assets = [
+    Assets.images.android.bumper.a.lit.keyName,
+    Assets.images.android.bumper.a.dimmed.keyName,
+    Assets.images.android.bumper.b.lit.keyName,
+    Assets.images.android.bumper.b.dimmed.keyName,
+    Assets.images.android.bumper.cow.lit.keyName,
+    Assets.images.android.bumper.cow.dimmed.keyName,
+  ];
+  final flameTester = FlameTester(() => TestGame(assets));
+
+  group('RampSensor', () {
+    flameTester.test('closes bloc when removed', (game) async {
+      final bloc = MockRampSensorCubit();
+      whenListen(
+        bloc,
+        const Stream<RampSensorState>.empty(),
+        initialState: const RampSensorState.initial(),
+      );
+      when(bloc.close).thenAnswer((_) async {});
+      final rampSensor = RampSensor.test(
+        type: RampSensorType.door,
+        bloc: bloc,
+      );
+      final parent = SpaceshipRamp.test();
+
+      await game.ensureAdd(parent);
+      await parent.ensureAdd(rampSensor);
+      parent.remove(rampSensor);
+      await game.ready();
+
+      verify(bloc.close).called(1);
+    });
+  });
+}

test/game/pinball_game_test.dart

@@ -472,8 +472,11 @@ void main() {
         game.onTapUp(tapUpEvent);
         await game.ready();
 
+        final currentBalls =
+            game.descendants().whereType<ControlledBall>().toList();
+
         expect(
-          game.descendants().whereType<ControlledBall>().length,
+          currentBalls.length,
           equals(previousBalls.length + 1),
         );
       },