[#15] Add unit tests

Author: nkhanh44

lib/model/meta_model.dart

@@ -13,7 +13,7 @@ class MetaModel extends Equatable {
     required this.records,
   });
 
-  const MetaModel.empty()
+  const MetaModel.dummy()
       : this(
           page: 0,
           pages: 0,

lib/model/response/meta_response.dart

@@ -21,6 +21,15 @@ class MetaResponse {
   factory MetaResponse.fromJson(Map<String, dynamic> json) =>
       _$MetaResponseFromJson(ResponseDecoder.decode(json));
 
+  static MetaResponse dummy() {
+    return MetaResponse(
+      page: 0,
+      pages: 0,
+      pageSize: 0,
+      records: 0,
+    );
+  }
+
   MetaModel toMetaModel() => MetaModel(
         page: page ?? 0,
         pages: pages ?? 0,

lib/model/response/surveys_container_response.dart

@@ -2,7 +2,7 @@ import 'package:freezed_annotation/freezed_annotation.dart';
 import 'package:survey_flutter/api/response_decoder.dart';
 import 'package:survey_flutter/model/meta_model.dart';
 import 'package:survey_flutter/model/response/meta_response.dart';
-import 'package:survey_flutter/model/response/survey_reponse.dart';
+import 'package:survey_flutter/model/response/survey_response.dart';
 import 'package:survey_flutter/model/surveys_container_model.dart';
 
 part 'surveys_container_response.g.dart';
@@ -25,6 +25,6 @@ class SurveysContainerResponse {
   SurveysContainerModel toSurveysContainerModel() => SurveysContainerModel(
         surveys:
             data?.map((item) => item.toSurveyModel()).toList() ?? List.empty(),
-        meta: meta?.toMetaModel() ?? const MetaModel.empty(),
+        meta: meta?.toMetaModel() ?? const MetaModel.dummy(),
       );
 }

lib/model/surveys_container_model.dart

@@ -11,10 +11,10 @@ class SurveysContainerModel extends Equatable {
     required this.meta,
   });
 
-  SurveysContainerModel.empty()
+  SurveysContainerModel.dummy()
       : this(
           surveys: List.empty(),
-          meta: const MetaModel.empty(),
+          meta: const MetaModel.dummy(),
         );
 
   @override

lib/usecases/get_surveys_use_case.dart

@@ -1,4 +1,3 @@
-import 'package:injectable/injectable.dart';
 import 'package:survey_flutter/model/surveys_container_model.dart';
 import 'package:survey_flutter/repositories/survey_repository.dart';
 
@@ -14,7 +13,6 @@ class SurveysParams {
   });
 }
 
-@Injectable()
 class GetSurveysUseCase extends UseCase<SurveysContainerModel, SurveysParams> {
   final SurveyRepository _repository;
 

test/api/repositories/survey_repository_test.dart

@@ -0,0 +1,44 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:mockito/mockito.dart';
+import 'package:survey_flutter/api/exception/network_exceptions.dart';
+import 'package:survey_flutter/model/response/meta_response.dart';
+import 'package:survey_flutter/model/response/surveys_container_response.dart';
+import 'package:survey_flutter/repositories/survey_repository.dart';
+
+import '../../mocks/generate_mocks.mocks.dart';
+
+void main() {
+  group('SurveyRepository', () {
+    late MockSurveyApiService mockSurveyApiService;
+    late SurveyRepositoryImpl surveyRepository;
+
+    setUp(() {
+      mockSurveyApiService = MockSurveyApiService();
+      surveyRepository = SurveyRepositoryImpl(mockSurveyApiService);
+    });
+
+    test('when getting surveys is successful returns SurveysContainerModel',
+        () async {
+      final surveysResponse = SurveysContainerResponse(
+        data: List.empty(),
+        meta: MetaResponse.dummy(),
+      );
+      when(mockSurveyApiService.getSurveys(any, any))
+          .thenAnswer((_) async => surveysResponse);
+
+      final result =
+          await surveyRepository.getSurveys(pageSize: 0, pageNumber: 0);
+      expect(result, surveysResponse.toSurveysContainerModel());
+    });
+
+    test('when getting surveys fails throws NetworkExceptions', () async {
+      when(mockSurveyApiService.getSurveys(any, any)).thenThrow(Exception());
+
+      expect(
+        () async =>
+            await surveyRepository.getSurveys(pageSize: 0, pageNumber: 0),
+        throwsA(isInstanceOf<NetworkExceptions>()),
+      );
+    });
+  });
+}

test/api/usecases/get_surveys_user_case_test.dart

@@ -0,0 +1,40 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:mockito/mockito.dart';
+import 'package:survey_flutter/model/surveys_container_model.dart';
+import 'package:survey_flutter/usecases/base/base_use_case.dart';
+import 'package:survey_flutter/usecases/get_surveys_use_case.dart';
+
+import '../../mocks/generate_mocks.mocks.dart';
+
+void main() {
+  group('GetSurveysUseCase', () {
+    late MockSurveyRepository mockRepository;
+    late GetSurveysUseCase getSurveysUseCase;
+
+    setUp(() {
+      mockRepository = MockSurveyRepository();
+      getSurveysUseCase = GetSurveysUseCase(mockRepository);
+    });
+
+    test('When getting surveys is successful returns Success ', () async {
+      final surveysContainerModel = SurveysContainerModel.dummy();
+      final surveysParams = SurveysParams(pageNumber: 0, pageSize: 10);
+      when(mockRepository.getSurveys(pageNumber: 0, pageSize: 10))
+          .thenAnswer((_) async => surveysContainerModel);
+
+      final result = await getSurveysUseCase(surveysParams);
+
+      expect(result, isA<Success<SurveysContainerModel>>());
+    });
+
+    test('returns Failed when getting surveys fails', () async {
+      final surveysParams = SurveysParams(pageNumber: 0, pageSize: 10);
+
+      when(mockRepository.getSurveys(pageNumber: 0, pageSize: 10))
+          .thenThrow(Exception());
+      final result = await getSurveysUseCase(surveysParams);
+
+      expect(result, isA<Failed<SurveysContainerModel>>());
+    });
+  });
+}

test/mocks/generate_mocks.dart

@@ -1,6 +1,7 @@
 import 'package:dio/dio.dart';
 import 'package:mockito/annotations.dart';
 import 'package:survey_flutter/api/authentication_api_service.dart';
+import 'package:survey_flutter/api/survey_api_service.dart';
 import 'package:survey_flutter/repositories/authentication_repository.dart';
 import 'package:survey_flutter/usecases/login_use_case.dart';
 import 'package:survey_flutter/utils/internet_connection_manager.dart';
@@ -16,6 +17,7 @@ import '../utils/async_listener.dart';
   InternetConnectionManager,
   LoginUseCase,
   SurveyRepository,
+  SurveyApiService,
 ])
 main() {
   // empty class to generate mock repository classes