test: tests for alien bumpers

packages/pinball_components/test/src/components/alien_bumper_test.dart

@@ -0,0 +1,68 @@
+// ignore_for_file: cascade_invocations
+
+import 'package:flame/components.dart';
+import 'package:flame_test/flame_test.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:pinball_components/pinball_components.dart';
+
+import '../../helpers/helpers.dart';
+
+void main() {
+  TestWidgetsFlutterBinding.ensureInitialized();
+  final flameTester = FlameTester(TestGame.new);
+
+  group('AlienBumper', () {
+    flameTester.test('"a" loads correctly', (game) async {
+      final bumper = AlienBumper.a();
+      await game.ensureAdd(bumper);
+
+      expect(game.contains(bumper), isTrue);
+    });
+
+    flameTester.test('"b" loads correctly', (game) async {
+      final bumper = AlienBumper.b();
+      await game.ensureAdd(bumper);
+      expect(game.contains(bumper), isTrue);
+    });
+
+    flameTester.test('activate returns normally', (game) async {
+      final bumper = AlienBumper.a();
+      await game.ensureAdd(bumper);
+
+      expect(bumper.activate, returnsNormally);
+    });
+
+    flameTester.test('deactivate returns normally', (game) async {
+      final bumper = AlienBumper.a();
+      await game.ensureAdd(bumper);
+
+      expect(bumper.deactivate, returnsNormally);
+    });
+
+    flameTester.test('changes sprite', (game) async {
+      final bumper = AlienBumper.a();
+      await game.ensureAdd(bumper);
+
+      final spriteComponent = bumper.firstChild<SpriteComponent>()!;
+
+      final deactivatedSprite = spriteComponent.sprite;
+      bumper.activate();
+      expect(
+        spriteComponent.sprite,
+        isNot(equals(deactivatedSprite)),
+      );
+
+      final activatedSprite = spriteComponent.sprite;
+      bumper.deactivate();
+      expect(
+        spriteComponent.sprite,
+        isNot(equals(activatedSprite)),
+      );
+
+      expect(
+        activatedSprite,
+        isNot(equals(deactivatedSprite)),
+      );
+    });
+  });
+}