bloc_api_request_test.dart

import 'package:flutter_test/flutter_test.dart';
import 'package:mockito/mockito.dart';
import 'notice.dart';
import 'notice_api.dart';
import 'notice_bloc.dart';

class MockNoticeApi extends Mock implements NoticeApi {}

void main() {
  group('notice', () {
    test('Bloc fetches my notice list', () async {
      final noticeList = [
        Notice.fromJson(
          {
            'id': 1,
            'body': 'お知らせです',
            'imageUrl': 'https://pbs.twimg.com/profile_images/1173564926905831424/XqIV7z5I_400x400.jpg',
            'link': '/chat/1',
            'created_at': '2020-04-18T22:38:50.018298+09:00',
          },
        )
      ];
      
      final mockNoticeApi = MockNoticeApi();
      when(mockNoticeApi.fetchMyNoticeList())
          .thenAnswer((_) => Future.value(noticeList));
      
      final bloc = NoticeBloc(noticeApi: mockNoticeApi);
      expect(bloc.notices.value, null);

      expect(
        bloc.notices,
        emitsInOrder([emits((val) => val == null), emits((val) => val == noticeList)]),
      );
      bloc.fetchMyNoticeList();
      
      expect(
        bloc.notices,
        emitsInOrder([
          emits((val) => val == null),
          emits((val) => val == noticeList),
          emits((val) => val == noticeList)
        ]),
      );
      bloc.fetchMyNoticeList();
    });
  });
}