test: add golden test

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

@@ -0,0 +1,31 @@
+// ignore_for_file: cascade_invocations
+
+import 'package:flame_forge2d/flame_forge2d.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() {
+  group('Boundaries', () {
+    final tester = FlameTester(TestGame.new);
+
+    tester.testGameWidget(
+      'render correctly',
+      setUp: (game, tester) async {
+        await game.addFromBlueprint(Boundaries());
+        await game.ready();
+        game.camera.followVector2(Vector2.zero());
+        game.camera.zoom = 3.9;
+      },
+      // TODO(allisonryan0002): enable test when workflows are fixed.
+      // verify: (game, tester) async {
+      //   await expectLater(
+      //     find.byGame<Forge2DGame>(),
+      //     matchesGoldenFile('golden/boundaries.png'),
+      //   );
+      // },
+    );
+  });
+}