[#31] Refactor

Author: nkhanh44

lib/screens/home/home_screen.dart

@@ -34,7 +34,7 @@ class _HomeScreenState extends ConsumerState<HomeScreen> {
   }
 
   Future<void> _initData() async {
-    ref.read(homeViewModelProvider.notifier).loadSurveys();
+    ref.read(homeViewModelProvider.notifier).loadSurveys(isRefreshing: false);
   }
 
   @override
@@ -68,39 +68,42 @@ class _HomeScreenState extends ConsumerState<HomeScreen> {
       );
     }
     return Scaffold(
+        backgroundColor: Colors.black,
         body: RefreshIndicator(
-      color: Colors.white,
-      backgroundColor: Colors.black,
-      onRefresh:() => ref.read(homeViewModelProvider.notifier).loadSurveys(isRefreshing: true),
-      child: SingleChildScrollView(
-        physics: const AlwaysScrollableScrollPhysics(),
-        child: SizedBox(
-          height: MediaQuery.of(context).size.height,
-          child: Stack(
-            children: [
-              if (surveys.isNotEmpty) ...[
-                HomePagesWidget(
-                  surveys: surveys,
-                  currentPage: _currentPage,
-                ),
-                const HomeHeaderWidget(),
-                Align(
-                  alignment: Alignment.bottomCenter,
-                  child: Padding(
-                    padding: const EdgeInsets.only(bottom: 220),
-                    child: HomePageIndicatorWidget(
-                        surveysLength: surveys.length,
-                        currentPage: _currentPage,
+          color: Colors.white,
+          backgroundColor: Colors.black,
+          onRefresh: () => ref
+              .read(homeViewModelProvider.notifier)
+              .loadSurveys(isRefreshing: true),
+          child: SingleChildScrollView(
+            physics: const AlwaysScrollableScrollPhysics(),
+            child: SizedBox(
+              height: MediaQuery.of(context).size.height,
+              child: Stack(
+                children: [
+                  if (surveys.isNotEmpty) ...[
+                    HomePagesWidget(
+                      surveys: surveys,
+                      currentPage: _currentPage,
+                    ),
+                    const HomeHeaderWidget(),
+                    Align(
+                      alignment: Alignment.bottomCenter,
+                      child: Padding(
+                        padding: const EdgeInsets.only(bottom: 220),
+                        child: HomePageIndicatorWidget(
+                          surveysLength: surveys.length,
+                          currentPage: _currentPage,
                         ),
-                  ),
-                )
-              ],
-              if (surveys.isEmpty || isLoading) _buildShimmerLoading(),
-            ],
+                      ),
+                    )
+                  ],
+                  if (surveys.isEmpty || isLoading) _buildShimmerLoading(),
+                ],
+              ),
+            ),
           ),
-        ),
-      ),
-    ));
+        ));
   }
 
   Widget _buildShimmerLoading() {

lib/screens/home/home_view_model.dart

@@ -39,8 +39,10 @@ class HomeViewModel extends StateNotifier<HomeState> {
   final _error = StreamController<String>();
   Stream<String> get error => _error.stream;
 
-  void loadSurveys() async {
-    _loadSurveysFromCache();
+  Future<void> loadSurveys({required bool isRefreshing}) async {
+    if (!isRefreshing) {
+      _loadSurveysFromCache();
+    }
     _loadSurveysFromRemote();
   }
 

test/screens/home/home_view_model_test.dart

@@ -50,7 +50,7 @@ void main() {
             .thenAnswer((_) => Future.value(Success(surveys)));
         final surveysStream = homeViewModel.surveys;
         final stateStream = homeViewModel.stream;
-        homeViewModel.loadSurveys();
+        homeViewModel.loadSurveys(isRefreshing: false);
         expect(surveysStream, emitsInOrder([surveys]));
         expect(
             stateStream,
@@ -61,6 +61,17 @@ void main() {
       },
     );
 
+    test(
+        'When refreshing surveys successfully and emits a list of surveys with state LoadSurveysSuccess',
+        () {
+      when(mockGetSurveysUseCase.call(any)).thenAnswer(
+        (_) async => Success(surveys),
+      );
+      final surveysStream = homeViewModel.surveys;
+      homeViewModel.loadSurveys(isRefreshing: true);
+      expect(surveysStream, emitsInOrder([surveys]));
+    });
+
     test(
       'loads surveys with error and emits error state',
       () async {
@@ -71,7 +82,7 @@ void main() {
           (_) async => Failed(exception),
         );
         final errorStream = homeViewModel.error;
-        homeViewModel.loadSurveys();
+        homeViewModel.loadSurveys(isRefreshing: false);
         expect(
           errorStream,
           emitsInOrder(