[RED] Implement test for fcm repository

lib/repository/cloud_messaging_repository.dart

+abstract class BaseCloudMessagingRepository {
+  Future<void> sendFCMToken(String fcmToken, String token);
+}
+
+class CloudMessagingRepository implements BaseCloudMessagingRepository {
+  @override
+  Future<bool> sendFCMToken(String fcmToken, String token) async {
+    return false;
+  }
+}

test/cloud_messaging_test.dart

+import 'package:bisaGo/repository/cloud_messaging_repository.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:get_it/get_it.dart';
+import 'package:mockito/mockito.dart';
+
+class MockCloudMessagingRepository extends Fake
+    implements CloudMessagingRepository {
+  @override
+  Future<bool> sendFCMToken(String fcmToken, String token) async {
+    return Future.value(true);
+  }
+}
+
+void main() {
+  setUpAll(() {
+    final _getIt = GetIt.instance;
+    _getIt.registerLazySingleton<BaseCloudMessagingRepository>(
+        () => MockCloudMessagingRepository());
+  });
+  testWidgets('Generate fcm token', (WidgetTester tester) async {
+    final generatedUrl =
+        await MockCloudMessagingRepository().sendFCMToken('fcmToken', 'token');
+
+    expect(generatedUrl, true);
+  });
+}