ML-143 EV100 indication (#148)

* added `showEV100` to user preferences

* integrated EV100 setting to UI

* available for pro

* replaced `IAPProducts.isPurchased` with context extension

* fixed `UserPreferencesProvider` tests

* EV100 -> Ev100

lib/data/shared_prefs_service.dart

@@ -16,6 +16,7 @@ class UserPreferencesService {
 
   static const evSourceTypeKey = "evSourceType";
   static const stopTypeKey = "stopType";
+  static const showEv100Key = "showEv100";
   static const cameraEvCalibrationKey = "cameraEvCalibration";
   static const lightSensorEvCalibrationKey = "lightSensorEvCalibration";
   static const meteringScreenLayoutKey = "meteringScreenLayout";
@@ -84,6 +85,9 @@ class UserPreferencesService {
   StopType get stopType => StopType.values[_sharedPreferences.getInt(stopTypeKey) ?? 2];
   set stopType(StopType value) => _sharedPreferences.setInt(stopTypeKey, value.index);
 
+  bool get showEv100 => _sharedPreferences.getBool(showEv100Key) ?? false;
+  set showEv100(bool value) => _sharedPreferences.setBool(showEv100Key, value);
+
   MeteringScreenLayoutConfig get meteringScreenLayout {
     final configJson = _sharedPreferences.getString(meteringScreenLayoutKey);
     if (configJson != null) {

lib/l10n/intl_en.arb

@@ -34,6 +34,7 @@
     "calibrationMessageCameraOnly": "The accuracy of the readings measured by this application depends entirely on the rear camera of the device. Therefore, consider testing this application and setting up an EV calibration value that will give you the desired measurement results.",
     "camera": "Camera",
     "lightSensor": "Light sensor",
+    "showEv100": "Show EV\u2081\u2080\u2080",
     "meteringScreenLayout": "Metering screen layout",
     "meteringScreenLayoutHint": "Hide elements on the metering screen that you don't need so that they don't waste exposure pairs list space.",
     "meteringScreenLayoutHintEquipmentProfiles": "Equipment profile picker",

lib/l10n/intl_fr.arb

@@ -34,6 +34,7 @@
     "calibrationMessageCameraOnly": "La précision des lectures mesurées par cette application dépend entièrement de la caméra arrière de l'appareil. Par conséquent, envisagez de tester cette application et de configurer une valeur d'étalonnage EV qui vous donnera les résultats de mesure souhaités.",
     "camera": "Caméra",
     "lightSensor": "Capteur de lumière",
+    "showEv100": "Montrer EV\u2081\u2080\u2080",
     "meteringScreenLayout": "Disposition de l'écran de mesure",
     "meteringScreenLayoutHint": "Masquer les éléments sur l'écran de mesure dont vous n'avez pas besoin pour qu'ils ne gaspillent pas de l'espace dans les paires d'exposition.",
     "meteringScreenLayoutHintEquipmentProfiles": "Sélecteur de profil de l'équipement",

lib/l10n/intl_ru.arb

@@ -34,6 +34,7 @@
     "calibrationMessageCameraOnly": "Точность измерений данного приложения полностью зависит от точности камеры вашего устройства. Поэтому рекомендуется самостоятельно подобрать калибровочное значение, которое даст желаемый результат измерений.",
     "camera": "Камера",
     "lightSensor": "Датчик освещённости",
+    "showEv100": "Показывать EV\u2081\u2080\u2080",
     "meteringScreenLayout": "Элементы главного экрана",
     "meteringScreenLayoutHint": "Здесь вы можете скрыть некоторые ненужные или неиспользуемые элементы с главного экрана.",
     "meteringScreenLayoutHintEquipmentProfiles": "Выбор профиля оборудования",

lib/l10n/intl_zh.arb

@@ -34,6 +34,7 @@
     "calibrationMessageCameraOnly": "此应用程序测量读数的准确s性完全取决于设备的后置摄像头。因此，请考虑测试此应用并手动设置 EV 校准，以获得准确的测量结果。",
     "camera": "摄像头",
     "lightSensor": "光传感器",
+    "showEv100": "显示 EV\u2081\u2080\u2080",
     "meteringScreenLayout": "布局",
     "meteringScreenLayoutHint": "隐藏不需要的元素，以免浪费曝光列表空间",
     "meteringScreenLayoutHintEquipmentProfiles": "设备配置选择",

lib/providers/equipment_profile_provider.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:lightmeter/utils/context_utils.dart';
 import 'package:lightmeter/utils/selectable_provider.dart';
 import 'package:m3_lightmeter_iap/m3_lightmeter_iap.dart';
 import 'package:m3_lightmeter_resources/m3_lightmeter_resources.dart';
@@ -52,9 +53,9 @@ class EquipmentProfileProviderState extends State<EquipmentProfileProvider> {
     return EquipmentProfiles(
       values: [
         _defaultProfile,
-        if (IAPProducts.isPurchased(context, IAPProductType.paidFeatures)) ..._customProfiles,
+        if (context.isPro) ..._customProfiles,
       ],
-      selected: IAPProducts.isPurchased(context, IAPProductType.paidFeatures) ? _selectedProfile : _defaultProfile,
+      selected: context.isPro ? _selectedProfile : _defaultProfile,
       child: widget.child,
     );
   }

lib/providers/films_provider.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:lightmeter/utils/context_utils.dart';
 import 'package:lightmeter/utils/selectable_provider.dart';
 import 'package:m3_lightmeter_iap/m3_lightmeter_iap.dart';
 import 'package:m3_lightmeter_resources/m3_lightmeter_resources.dart';
@@ -44,11 +45,9 @@ class FilmsProviderState extends State<FilmsProvider> {
       ],
       filmsInUse: [
         const Film.other(),
-        if (IAPProducts.isPurchased(context, IAPProductType.paidFeatures)) ..._filmsInUse,
+        if (context.isPro) ..._filmsInUse,
       ],
-      selected: IAPProducts.isPurchased(context, IAPProductType.paidFeatures)
+      selected: context.isPro ? _selected : const Film.other(),
-          ? _selected
-          : const Film.other(),
       child: widget.child,
     );
   }

lib/providers/user_preferences_provider.dart

@@ -53,6 +53,10 @@ class UserPreferencesProvider extends StatefulWidget {
     return _inheritFromEnumsModel(context, _Aspect.stopType).stopType;
   }
 
+  static bool showEv100Of(BuildContext context) {
+    return _inheritFromEnumsModel(context, _Aspect.showEv100).showEv100;
+  }
+
   static CameraFeaturesConfig cameraConfigOf(BuildContext context) {
     return context.findAncestorWidgetOfExactType<_CameraFeaturesModel>()!.data;
   }
@@ -83,6 +87,7 @@ class UserPreferencesProvider extends StatefulWidget {
 class _UserPreferencesProviderState extends State<UserPreferencesProvider> with WidgetsBindingObserver {
   late EvSourceType _evSourceType;
   late StopType _stopType = widget.userPreferencesService.stopType;
+  late bool _showEv100 = widget.userPreferencesService.showEv100;
   late MeteringScreenLayoutConfig _meteringScreenLayout = widget.userPreferencesService.meteringScreenLayout;
   late CameraFeaturesConfig _cameraFeatures = widget.userPreferencesService.cameraFeatures;
   late SupportedLocale _locale = widget.userPreferencesService.locale;
@@ -135,6 +140,7 @@ class _UserPreferencesProviderState extends State<UserPreferencesProvider> with
           evSourceType: _evSourceType,
           locale: _locale,
           primaryColor: dynamicPrimaryColor ?? _primaryColor,
+          showEv100: _showEv100,
           stopType: _stopType,
           themeType: _themeType,
           child: _MeteringScreenLayoutModel(
@@ -201,6 +207,13 @@ class _UserPreferencesProviderState extends State<UserPreferencesProvider> with
     widget.userPreferencesService.primaryColor = primaryColor;
   }
 
+  void toggleShowEv100() {
+    setState(() {
+      _showEv100 = !_showEv100;
+    });
+    widget.userPreferencesService.showEv100 = _showEv100;
+  }
+
   void setStopType(StopType stopType) {
     setState(() {
       _stopType = stopType;
@@ -231,6 +244,7 @@ enum _Aspect {
   dynamicColorState,
   evSourceType,
   locale,
+  showEv100,
   stopType,
   theme,
   themeType,
@@ -240,6 +254,7 @@ class _UserPreferencesModel extends InheritedModel<_Aspect> {
   final DynamicColorState dynamicColorState;
   final EvSourceType evSourceType;
   final SupportedLocale locale;
+  final bool showEv100;
   final StopType stopType;
   final ThemeType themeType;
 
@@ -252,6 +267,7 @@ class _UserPreferencesModel extends InheritedModel<_Aspect> {
     required this.evSourceType,
     required this.locale,
     required Color primaryColor,
+    required this.showEv100,
     required this.stopType,
     required this.themeType,
     required super.child,
@@ -267,6 +283,7 @@ class _UserPreferencesModel extends InheritedModel<_Aspect> {
         evSourceType != oldWidget.evSourceType ||
         locale != oldWidget.locale ||
         _primaryColor != oldWidget._primaryColor ||
+        showEv100 != oldWidget.showEv100 ||
         stopType != oldWidget.stopType ||
         themeType != oldWidget.themeType;
   }
@@ -279,6 +296,7 @@ class _UserPreferencesModel extends InheritedModel<_Aspect> {
     return (dependencies.contains(_Aspect.dynamicColorState) && dynamicColorState != oldWidget.dynamicColorState) ||
         (dependencies.contains(_Aspect.evSourceType) && evSourceType != oldWidget.evSourceType) ||
         (dependencies.contains(_Aspect.locale) && locale != oldWidget.locale) ||
+        (dependencies.contains(_Aspect.showEv100) && showEv100 != oldWidget.showEv100) ||
         (dependencies.contains(_Aspect.stopType) && stopType != oldWidget.stopType) ||
         (dependencies.contains(_Aspect.theme) &&
             (_brightness != oldWidget._brightness || _primaryColor != oldWidget._primaryColor)) ||

lib/screens/metering/components/bottom_controls/components/measure_button/widget_button_measure.dart

@@ -1,15 +1,21 @@
 import 'package:flutter/material.dart';
 import 'package:lightmeter/generated/l10n.dart';
+import 'package:lightmeter/providers/user_preferences_provider.dart';
 import 'package:lightmeter/res/dimens.dart';
 import 'package:lightmeter/screens/shared/filled_circle/widget_circle_filled.dart';
+import 'package:lightmeter/utils/context_utils.dart';
+
+const String _subscript100 = '\u2081\u2080\u2080';
 
 class MeteringMeasureButton extends StatefulWidget {
   final double? ev;
+  final double? ev100;
   final bool isMetering;
   final VoidCallback onTap;
 
   const MeteringMeasureButton({
     required this.ev,
+    required this.ev100,
     required this.isMetering,
     required this.onTap,
     super.key,
@@ -61,7 +67,7 @@ class _MeteringMeasureButtonState extends State<MeteringMeasureButton> {
                   color: Theme.of(context).colorScheme.onSurface,
                   size: Dimens.grid72 - Dimens.grid8,
                   child: Center(
-                    child: widget.ev != null ? _EvValueText(ev: widget.ev!) : null,
+                    child: widget.ev != null ? _EvValueText(ev: widget.ev!, ev100: widget.ev100!) : null,
                   ),
                 ),
               ),
@@ -83,16 +89,32 @@ class _MeteringMeasureButtonState extends State<MeteringMeasureButton> {
 
 class _EvValueText extends StatelessWidget {
   final double ev;
+  final double ev100;
 
-  const _EvValueText({required this.ev});
+  const _EvValueText({
+    required this.ev,
+    required this.ev100,
+  });
 
   @override
   Widget build(BuildContext context) {
     final theme = Theme.of(context);
     return Text(
-      '${ev.toStringAsFixed(1)}\n${S.of(context).ev}',
+      _text(context),
       style: theme.textTheme.bodyMedium?.copyWith(color: theme.colorScheme.surface),
       textAlign: TextAlign.center,
     );
   }
+
+  String _text(BuildContext context) {
+    final bool showEv100 = context.isPro && UserPreferencesProvider.showEv100Of(context);
+    final StringBuffer buffer = StringBuffer()
+      ..writeAll([
+        (showEv100 ? ev100 : ev).toStringAsFixed(1),
+        '\n',
+        S.of(context).ev,
+        if (showEv100) _subscript100,
+      ]);
+    return buffer.toString();
+  }
 }

lib/screens/metering/components/bottom_controls/provider_bottom_controls.dart

@@ -5,6 +5,7 @@ import 'package:lightmeter/screens/metering/components/bottom_controls/widget_bo
 
 class MeteringBottomControlsProvider extends StatelessWidget {
   final double? ev;
+  final double? ev100;
   final bool isMetering;
   final VoidCallback? onSwitchEvSourceType;
   final VoidCallback onMeasure;
@@ -12,6 +13,7 @@ class MeteringBottomControlsProvider extends StatelessWidget {
 
   const MeteringBottomControlsProvider({
     required this.ev,
+    required this.ev100,
     required this.isMetering,
     required this.onSwitchEvSourceType,
     required this.onMeasure,
@@ -35,6 +37,7 @@ class MeteringBottomControlsProvider extends StatelessWidget {
       ),
       child: MeteringBottomControls(
         ev: ev,
+        ev100: ev100,
         isMetering: isMetering,
         onSwitchEvSourceType: onSwitchEvSourceType,
         onMeasure: onMeasure,

lib/screens/metering/components/bottom_controls/widget_bottom_controls.dart

@@ -7,6 +7,7 @@ import 'package:lightmeter/screens/metering/components/bottom_controls/component
 
 class MeteringBottomControls extends StatelessWidget {
   final double? ev;
+  final double? ev100;
   final bool isMetering;
   final VoidCallback? onSwitchEvSourceType;
   final VoidCallback onMeasure;
@@ -14,6 +15,7 @@ class MeteringBottomControls extends StatelessWidget {
 
   const MeteringBottomControls({
     required this.ev,
+    required this.ev100,
     required this.isMetering,
     required this.onSwitchEvSourceType,
     required this.onMeasure,
@@ -58,6 +60,7 @@ class MeteringBottomControls extends StatelessWidget {
                   const Spacer(),
                 MeteringMeasureButton(
                   ev: ev,
+                  ev100: ev100,
                   isMetering: isMetering,
                   onTap: onMeasure,
                 ),

lib/screens/metering/components/camera_container/components/camera_preview/widget_camera_preview.dart

@@ -9,7 +9,7 @@ import 'package:lightmeter/screens/metering/components/camera_container/componen
 import 'package:lightmeter/screens/metering/components/camera_container/components/camera_preview/components/camera_view_placeholder/widget_placeholder_camera_view.dart';
 import 'package:lightmeter/screens/metering/components/camera_container/components/camera_preview/components/histogram/widget_histogram.dart';
 import 'package:lightmeter/screens/metering/components/camera_container/models/camera_error_type.dart';
-import 'package:m3_lightmeter_iap/m3_lightmeter_iap.dart';
+import 'package:lightmeter/utils/context_utils.dart';
 
 class CameraPreview extends StatefulWidget {
   final CameraController? controller;
@@ -93,7 +93,7 @@ class _CameraPreviewBuilderState extends State<_CameraPreviewBuilder> {
               alignment: Alignment.bottomCenter,
               children: [
                 CameraView(controller: widget.controller),
-                if (IAPProducts.isPurchased(context, IAPProductType.paidFeatures)) ...[
+                if (context.isPro) ...[
                   if (UserPreferencesProvider.cameraFeatureOf(
                     context,
                     CameraFeature.histogram,

lib/screens/metering/components/camera_container/widget_container_camera.dart

@@ -17,7 +17,6 @@ import 'package:lightmeter/screens/metering/components/shared/exposure_pairs_lis
 import 'package:lightmeter/screens/metering/components/shared/metering_top_bar/widget_top_bar_metering.dart';
 import 'package:lightmeter/screens/metering/components/shared/readings_container/widget_container_readings.dart';
 import 'package:lightmeter/utils/context_utils.dart';
-import 'package:m3_lightmeter_iap/m3_lightmeter_iap.dart';
 import 'package:m3_lightmeter_resources/m3_lightmeter_resources.dart';
 
 class CameraContainer extends StatelessWidget {
@@ -102,9 +101,8 @@ class CameraContainer extends StatelessWidget {
   }
 
   double _meteringContainerHeight(BuildContext context) {
-    final isPro = IAPProducts.isPurchased(context, IAPProductType.paidFeatures);
     double enabledFeaturesHeight = 0;
-    if (!isPro) {
+    if (!context.isPro) {
       enabledFeaturesHeight += Dimens.readingContainerSingleValueHeight;
       enabledFeaturesHeight += Dimens.paddingS;
     } else {

lib/screens/metering/components/shared/readings_container/widget_container_readings.dart

@@ -10,7 +10,6 @@ import 'package:lightmeter/screens/metering/components/shared/readings_container
 import 'package:lightmeter/screens/metering/components/shared/readings_container/components/lightmeter_pro/widget_lightmeter_pro.dart';
 import 'package:lightmeter/screens/metering/components/shared/readings_container/components/nd_picker/widget_picker_nd.dart';
 import 'package:lightmeter/utils/context_utils.dart';
-import 'package:m3_lightmeter_iap/m3_lightmeter_iap.dart';
 import 'package:m3_lightmeter_resources/m3_lightmeter_resources.dart';
 
 class ReadingsContainer extends StatelessWidget {
@@ -33,15 +32,14 @@ class ReadingsContainer extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    final isPro = IAPProducts.isPurchased(context, IAPProductType.paidFeatures);
     return Column(
       crossAxisAlignment: CrossAxisAlignment.stretch,
       children: [
-        if (!isPro) ...[
+        if (!context.isPro) ...[
           const LightmeterProAnimatedDialog(),
           const _InnerPadding(),
         ],
-        if (isPro && context.meteringFeature(MeteringScreenLayoutFeature.equipmentProfiles)) ...[
+        if (context.isPro && context.meteringFeature(MeteringScreenLayoutFeature.equipmentProfiles)) ...[
           const EquipmentProfilePicker(),
           const _InnerPadding(),
         ],
@@ -52,7 +50,7 @@ class ReadingsContainer extends StatelessWidget {
           ),
           const _InnerPadding(),
         ],
-        if (isPro && context.meteringFeature(MeteringScreenLayoutFeature.filmPicker)) ...[
+        if (context.isPro && context.meteringFeature(MeteringScreenLayoutFeature.filmPicker)) ...[
           FilmPicker(selectedIso: iso),
           const _InnerPadding(),
         ],

lib/screens/metering/screen_metering.dart

@@ -40,6 +40,7 @@ class MeteringScreen extends StatelessWidget {
             BlocBuilder<MeteringBloc, MeteringState>(
               builder: (context, state) => MeteringBottomControlsProvider(
                 ev: state is MeteringDataState ? state.ev : null,
+                ev100: state is MeteringDataState ? state.ev100 : null,
                 isMetering: state.isMetering,
                 onSwitchEvSourceType: ServicesProvider.of(context).environment.hasLightSensor
                     ? UserPreferencesProvider.of(context).toggleEvSourceType

lib/screens/settings/components/metering/components/show_ev_100/widget_list_tile_show_ev_100.dart

@@ -0,0 +1,24 @@
+import 'package:flutter/material.dart';
+import 'package:lightmeter/generated/l10n.dart';
+import 'package:lightmeter/providers/user_preferences_provider.dart';
+import 'package:lightmeter/res/dimens.dart';
+import 'package:lightmeter/screens/settings/components/shared/disable/widget_disable.dart';
+import 'package:lightmeter/utils/context_utils.dart';
+
+class ShowEv100ListTile extends StatelessWidget {
+  const ShowEv100ListTile({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return Disable(
+      disable: !context.isPro,
+      child: SwitchListTile(
+        secondary: const Icon(Icons.adjust),
+        title: Text(S.of(context).showEv100),
+        value: context.isPro && UserPreferencesProvider.showEv100Of(context),
+        onChanged: (_) => UserPreferencesProvider.of(context).toggleShowEv100(),
+        contentPadding: const EdgeInsets.symmetric(horizontal: Dimens.paddingM),
+      ),
+    );
+  }
+}

lib/screens/settings/components/metering/widget_settings_section_metering.dart

@@ -6,6 +6,7 @@ import 'package:lightmeter/screens/settings/components/metering/components/equip
 import 'package:lightmeter/screens/settings/components/metering/components/films/widget_list_tile_films.dart';
 import 'package:lightmeter/screens/settings/components/metering/components/fractional_stops/widget_list_tile_fractional_stops.dart';
 import 'package:lightmeter/screens/settings/components/metering/components/metering_screen_layout/widget_list_tile_metering_screen_layout.dart';
+import 'package:lightmeter/screens/settings/components/metering/components/show_ev_100/widget_list_tile_show_ev_100.dart';
 import 'package:lightmeter/screens/settings/components/shared/settings_section/widget_settings_section.dart';
 
 class MeteringSettingsSection extends StatelessWidget {
@@ -18,6 +19,7 @@ class MeteringSettingsSection extends StatelessWidget {
       children: const [
         StopTypeListTile(),
         CalibrationListTile(),
+        ShowEv100ListTile(),
         MeteringScreenLayoutListTile(),
         EquipmentProfilesListTile(),
         FilmsListTile(),

lib/screens/settings/components/shared/iap_list_tile/widget_list_tile_iap.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:lightmeter/screens/settings/components/shared/disable/widget_disable.dart';
+import 'package:lightmeter/utils/context_utils.dart';
 import 'package:m3_lightmeter_iap/m3_lightmeter_iap.dart';
 
 /// Depends on the product status and replaces [onTap] with purchase callback
@@ -22,9 +23,8 @@ class IAPListTile extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    final isPurchased = IAPProducts.isPurchased(context, IAPProductType.paidFeatures);
     return Disable(
-      disable: !isPurchased,
+      disable: !context.isPro,
       child: ListTile(
         leading: leading,
         title: title,

lib/screens/settings/screen_settings.dart

@@ -7,7 +7,7 @@ import 'package:lightmeter/screens/settings/components/metering/widget_settings_
 import 'package:lightmeter/screens/settings/components/theme/widget_settings_section_theme.dart';
 import 'package:lightmeter/screens/settings/flow_settings.dart';
 import 'package:lightmeter/screens/shared/sliver_screen/screen_sliver.dart';
-import 'package:m3_lightmeter_iap/m3_lightmeter_iap.dart';
+import 'package:lightmeter/utils/context_utils.dart';
 
 class SettingsScreen extends StatefulWidget {
   const SettingsScreen({super.key});
@@ -38,8 +38,7 @@ class _SettingsScreenState extends State<SettingsScreen> {
           SliverList(
             delegate: SliverChildListDelegate(
               <Widget>[
-                if (!IAPProducts.isPurchased(context, IAPProductType.paidFeatures))
+                if (!context.isPro) const LightmeterProSettingsSection(),
-                  const LightmeterProSettingsSection(),
                 const MeteringSettingsSection(),
                 const GeneralSettingsSection(),
                 const ThemeSettingsSection(),

test/data/shared_prefs_service_test.dart

@@ -181,6 +181,25 @@ void main() {
     });
   });
 
+  group('showEv100', () {
+    test('get default', () {
+      when(() => sharedPreferences.getBool(UserPreferencesService.showEv100Key)).thenReturn(null);
+      expect(service.showEv100, false);
+    });
+
+    test('get', () {
+      when(() => sharedPreferences.getBool(UserPreferencesService.showEv100Key)).thenReturn(true);
+      expect(service.showEv100, true);
+    });
+
+    test('set', () {
+      when(() => sharedPreferences.setBool(UserPreferencesService.showEv100Key, false))
+          .thenAnswer((_) => Future.value(true));
+      service.showEv100 = false;
+      verify(() => sharedPreferences.setBool(UserPreferencesService.showEv100Key, false)).called(1);
+    });
+  });
+
   group('meteringScreenLayout', () {
     test('get default', () {
       when(

test/providers/user_preferences_provider_test.dart

@@ -27,6 +27,7 @@ void main() {
 
   setUp(() {
     when(() => mockUserPreferencesService.evSourceType).thenReturn(EvSourceType.camera);
+    when(() => mockUserPreferencesService.showEv100).thenReturn(false);
     when(() => mockUserPreferencesService.stopType).thenReturn(StopType.third);
     when(() => mockUserPreferencesService.meteringScreenLayout).thenReturn({
       MeteringScreenLayoutFeature.extremeExposurePairs: true,
@@ -164,6 +165,27 @@ void main() {
     },
   );
 
+  testWidgets(
+    'Toggle Ev100',
+    (tester) async {
+      when(() => mockUserPreferencesService.showEv100).thenReturn(false);
+      await pumpTestWidget(
+        tester,
+        builder: (context) => ElevatedButton(
+          onPressed: () => UserPreferencesProvider.of(context).toggleShowEv100(),
+          child: Text('${UserPreferencesProvider.showEv100Of(context)}'),
+        ),
+      );
+      await tester.pumpAndSettle();
+      expect(find.text("${false}"), findsOneWidget);
+
+      await tester.tap(find.text("${false}"));
+      await tester.pumpAndSettle();
+      expect(find.text("${true}"), findsOneWidget);
+      verify(() => mockUserPreferencesService.showEv100 = true).called(1);
+    },
+  );
+
   testWidgets(
     'Set metering screen layout config',
     (tester) async {