fix coverage

Author: jorgecoca

flutter_news_example/lib/main/bootstrap/bootstrap.dart

@@ -37,7 +37,7 @@ Future<void> bootstrap(AppBuilder builder) async {
         analyticsRepository: analyticsRepository,
       );
       Bloc.observer = blocObserver;
-      final storageDirectory = await getApplicationDocumentsDirectory();
+      final storageDirectory = await getApplicationSupportDirectory();
       HydratedBloc.storage = await HydratedStorage.build(
         storageDirectory: HydratedStorageDirectory(storageDirectory.path),
       );

flutter_news_example/test/categories/bloc/categories_state_test.dart

@@ -20,6 +20,11 @@ void main() {
       );
     });
 
+    test('getCategoryName returns null when not found', () {
+      final state = CategoriesState.initial();
+      expect(state.getCategoryName('unknown'), isNull);
+    });
+
     group('copyWith', () {
       test(
           'returns same object '