Pine BLoC

A brick to create your blocs (with events and states) including tests.

This brick makes use of the internal lib pine_bricks_helper to get access to the package name, so please run this brick in the root of your project where a valid pubspec.yaml file exists. Also, make sure you have previously set up your project to work with the freezed and the flutter_bloc library.

How to use 🚀

mason make pine_bloc --name "SignIn" --events "perform" --states "performing,performed,error"

Variables ✨

Outputs 📦

--name "SignIn" --events "perform" --states "performing,performed,error"
├── lib
│   └── blocs
│       └── sign_in
│           |── sign_in_bloc.dart
│           |── sign_in_event.dart
│           └── sign_in_state.dart
├── test
│   └── blocs
│       └── sign_in
│           └── sign_in_bloc_test.dart
└── ...

BLoC File

import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:freezed_annotation/freezed_annotation.dart';
import 'dart:async';

part 'sign_in_event.dart';

part 'sign_in_state.dart';

part 'sign_in_bloc.freezed.dart';

/// The SignInBloc
class SignInBloc extends Bloc<SignInEvent, SignInState> {

  /// Create a new instance of [SignInBloc].
  SignInBloc() : super(const SignInState.performing()) {
    on<PerformSignInEvent>(_onPerform);
  }

  /// Method used to add the [PerformSignInEvent] event
  void perform() => add(const SignInEvent.perform());

  FutureOr<void> _onPerform(PerformSignInEvent event,
      Emitter<SignInState> emit,) {
    //TODO: map PerformSignInEvent to SignInState states
  }
}

extension SignInBlocExtension on BuildContext {
  /// Extension method used to get the [SignInBloc] instance
  SignInBloc get signInBloc => read<SignInBloc>();
  
  /// Extension method used to watch the [SignInBloc] instance
  SignInBloc get watchSignInBloc => watch<SignInBloc>();
}

Event File

part of 'sign_in_bloc.dart';

@freezed
sealed class SignInEvent with _$SignInEvent {
  const factory SignInEvent.perform() = PerformSignInEvent;
}

State File

part of 'sign_in_bloc.dart';

@freezed
sealed class SignInState with _$SignInState {
  const factory SignInState.performing() = PerformingSignInState;

  const factory SignInState.performed() = PerformedSignInState;

  const factory SignInState.error() = ErrorSignInState;
}

Test File

import 'package:bloc_test/bloc_test.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:{{package_name}}/blocs/sign_in/sign_in_bloc.dart';

void main() {
  late SignInBloc bloc;

  setUp(() {
    bloc = SignInBloc();
  });

  /// Testing the event [PerformSignInEvent]
  group('when the event PerformSignInEvent is added to the BLoC', () {
    blocTest<SignInBloc, SignInState>(
      'test that SignInBloc emits SignInState.performing when perform is called',
      setUp: () {
        //TODO: setup the environment
      },
      build: () => bloc,
      act: (bloc) {
        bloc.perform();
      },
      expect: () =>
      <SignInState>[
        //TODO: define the emitted SignInState states
      ],
      verify: (_) {
        //TODO: verify that methods are invoked properly
      },
    );
  });
}

Setup 🧑‍💻

Ensure you have the mason_cli installed.

# 🎯 Activate from https://pub.dev
dart pub global activate mason_cli

# 🍺 Or install from https://brew.sh
brew tap felangel/mason
brew install mason

Installation ☁️

# Install locally
mason add pine_bloc

# Install globally
mason add -g pine_bloc

Usage 🚀

mason make pine_bloc

Variables ✨

Hooks 🪝

• ✅   Pre-Gen
• ✅   Post-Gen

Environment 🌎

mason: "^0.1.0"

0.6.1

Fixed watch accessor generation.

0.6.0

Added extension name from Bloc class. Added watch accessor to Bloc class.

0.5.0

Added sealed modifier to BlocEvent and BlocState classes to prevent extending them outside of the library. Removed extension name from Bloc class.

0.4.0

Updated mason minimum version to ^0.1.0

0.3.0

Added BLoC extension on context

0.2.0

State classes are now public to support new Dart 3 Switch Expressions

0.1.0

First release

Copyright (c) 2025 MyLittleSuite

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

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