import 'package:bloc_test/bloc_test.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:pinball/game/game.dart';

void main() {
  group('GameBloc', () {
    test('initial state has 3 balls and empty score', () {
      final gameBloc = GameBloc();
      expect(gameBloc.state.score, equals(0));
      expect(gameBloc.state.balls, equals(3));
    });

    group('LostBall', () {
      blocTest<GameBloc, GameState>(
        "doesn't decrease ball "
        'when no balls left',
        build: GameBloc.new,
        act: (bloc) {
          for (var i = 0; i <= bloc.state.balls; i++) {
            bloc.add(const BallLost());
          }
        },
        expect: () => [
          const GameState(score: 0, balls: 2),
          const GameState(score: 0, balls: 1),
          const GameState(score: 0, balls: 0),
        ],
      );
    });

    group('Scored', () {
      blocTest<GameBloc, GameState>(
        'increases score '
        'when game is not over',
        build: GameBloc.new,
        act: (bloc) => bloc
          ..add(const Scored(points: 2))
          ..add(const Scored(points: 3)),
        expect: () => [
          const GameState(score: 2, balls: 3),
          const GameState(score: 5, balls: 3),
        ],
      );

      blocTest<GameBloc, GameState>(
        "doesn't increase score "
        'when game is over',
        build: GameBloc.new,
        act: (bloc) {
          for (var i = 0; i < bloc.state.balls; i++) {
            bloc.add(const BallLost());
          }
          bloc.add(const Scored(points: 2));
        },
        expect: () => [
          const GameState(score: 0, balls: 2),
          const GameState(score: 0, balls: 1),
          const GameState(score: 0, balls: 0),
        ],
      );
    });
  });
}