test: fixed tests for animation

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

@@ -1,5 +1,6 @@
 // ignore_for_file: cascade_invocations
 
+import 'package:flame/components.dart';
 import 'package:flame_forge2d/flame_forge2d.dart';
 import 'package:flame_test/flame_test.dart';
 import 'package:flutter_test/flutter_test.dart';
@@ -149,6 +150,33 @@ void main() {
         expect(plunger.body.linearVelocity.y, isPositive);
         expect(plunger.body.linearVelocity.x, isZero);
       });
+
+      flameTester.test(
+        'animates when called',
+        (game) async {
+          await game.ensureAdd(plunger);
+
+          plunger.pull();
+
+          final animation =
+              plunger.descendants().whereType<SpriteAnimationComponent>().first;
+          expect(animation.playing, isTrue);
+        },
+      );
+
+      flameTester.test(
+        'stops animating after animation completes',
+        (game) async {
+          await game.ensureAdd(plunger);
+
+          plunger.pull();
+          game.update(1);
+
+          final animation =
+              plunger.descendants().whereType<SpriteAnimationComponent>().first;
+          expect(animation.playing, isFalse);
+        },
+      );
     });
 
     group('release', () {
@@ -182,6 +210,35 @@ void main() {
           expect(plunger.body.linearVelocity.x, isZero);
         },
       );
+
+      flameTester.test(
+        'animates when called',
+        (game) async {
+          await game.ensureAdd(plunger);
+
+          plunger.pull();
+          plunger.release();
+
+          final animation =
+              plunger.descendants().whereType<SpriteAnimationComponent>().first;
+          expect(animation.playing, isTrue);
+        },
+      );
+
+      flameTester.test(
+        'stops animating after animation completes',
+        (game) async {
+          await game.ensureAdd(plunger);
+
+          plunger.pull();
+          plunger.release();
+          game.update(1);
+
+          final animation =
+              plunger.descendants().whereType<SpriteAnimationComponent>().first;
+          expect(animation.playing, isFalse);
+        },
+      );
     });
   });