avoid-passing-bloc-to-bloc

added in: 1.2.0

warning

Warns when a Bloc depends on another Bloc.

Example

❌ Bad:

class BadBloc extends Bloc<CounterEvent, int> {
  final OtherBloc otherBloc;
  late final StreamSubscription otherBlocSubscription;

  // LINT
  BadBloc(this.otherBloc) : super(0) {
    otherBlocSubscription = otherBloc.stream.listen((state) {
      add(Change(1));
    });
  }

  @override
  void onChange(Change<int> change) {
    super.onChange(change);
    print(change);
  }
}

class OtherBloc extends Bloc<CounterEvent, int> {
  OtherBloc() : super(0);

  @override
  void onChange(Change<int> change) {
    super.onChange(change);
    print(change);
  }

  void _listenToChange() {}
}

✅ Good:

class GoodBloc extends Bloc<CounterEvent, int> {
  // You can pass the stream instead
  GoodBloc() : super(0) { }

  @override
  void onChange(Change<int> change) {
    super.onChange(change);
    print(change);
  }
}