refactor: moved beginContact to forge2d helper

test/game/components/flutter_forest_test.dart

@@ -1,7 +1,6 @@
 // ignore_for_file: cascade_invocations
 
 import 'package:bloc_test/bloc_test.dart';
-import 'package:flame_forge2d/flame_forge2d.dart';
 import 'package:flame_test/flame_test.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter_test/flutter_test.dart';
@@ -11,18 +10,6 @@ import 'package:pinball_components/pinball_components.dart';
 
 import '../../helpers/helpers.dart';
 
-void beginContact(Forge2DGame game, BodyComponent bodyA, BodyComponent bodyB) {
-  assert(
-    bodyA.body.fixtures.isNotEmpty && bodyB.body.fixtures.isNotEmpty,
-    'Bodies require fixtures to contact each other.',
-  );
-
-  final fixtureA = bodyA.body.fixtures.first;
-  final fixtureB = bodyB.body.fixtures.first;
-  final contact = Contact.init(fixtureA, 0, fixtureB, 0);
-  game.world.contactManager.contactListener?.beginContact(contact);
-}
-
 void main() {
   TestWidgetsFlutterBinding.ensureInitialized();
   final flameTester = FlameTester(EmptyPinballGameTest.new);

test/helpers/forge2d.dart

@@ -0,0 +1,13 @@
+import 'package:flame_forge2d/flame_forge2d.dart';
+
+void beginContact(Forge2DGame game, BodyComponent bodyA, BodyComponent bodyB) {
+  assert(
+    bodyA.body.fixtures.isNotEmpty && bodyB.body.fixtures.isNotEmpty,
+    'Bodies require fixtures to contact each other.',
+  );
+
+  final fixtureA = bodyA.body.fixtures.first;
+  final fixtureB = bodyB.body.fixtures.first;
+  final contact = Contact.init(fixtureA, 0, fixtureB, 0);
+  game.world.contactManager.contactListener?.beginContact(contact);
+}

test/helpers/helpers.dart

@@ -7,6 +7,7 @@
 export 'builders.dart';
 export 'extensions.dart';
 export 'fakes.dart';
+export 'forge2d.dart';
 export 'key_testers.dart';
 export 'mocks.dart';
 export 'navigator.dart';