feat: tested GameBloc

test/game/bloc/game_bloc_test.dart

@@ -0,0 +1,63 @@
+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),
+        ],
+      );
+    });
+  });
+}