ML-62 Utils tests (#133)

* removed redundant `UserPreferencesService` from `MeteringBloc`

* wip

* post-merge fixes

* `MeasureEvent` tests

* `MeasureEvent` tests revision

* `MeasureEvent` tests added timeout

* added stubs for other `MeteringBloc` events

* rewritten `MeteringBloc` logic

* wip

* `IsoChangedEvent` tests

* refined `IsoChangedEvent` tests

* `NdChangedEvent` tests

* `FilmChangedEvent` tests

* `MeteringCommunicationBloc` tests

* added test run to ci

* overriden `==` for `MeasuredState`

* `LuxMeteringEvent` tests

* refined `LuxMeteringEvent` tests

* rename

* wip

* wip

* `InitializeEvent`/`DeinitializeEvent` tests

* clamp minZoomLevel

* fixed `MeteringCommunicationBloc` tests

* wip

* `ZoomChangedEvent` tests

* `ExposureOffsetChangedEvent`/`ExposureOffsetResetEvent` tests

* renamed test groups

* added test coverage script

* improved `CameraContainerBloc` test coverage

* `EquipmentProfileChangedEvent` tests

* verify response vibration

* fixed running all tests

* `MeteringCommunicationBloc` equality tests

* `CameraContainerBloc` equality tests

* removed generated code from coverage

* `MeteringScreenLayoutFeature` tests

* `SupportedLocale` tests

* `Film` tests

* `CaffeineService` tests

* `UserPreferencesService` tests (wip)

* `LightSensorService` tests (wip)

* `migrateOldKeys()` tests

* ignore currently unused getters & setters

* gradle upgrade

* `reset(sharedPreferences);` calls count

* typo

* `MeteringInteractor` tests

* `SettingsInteractor` tests (wip)

* `MeteringInteractor` tests (wip)

* `SettingsInteractor` tests

* AnimatedDialog picker standalone tests

* Moved Animated dialog picker to widget tests

* `ExtremeExposurePairsContainer` widget test

* dialog picker test

* Match extreme exposure pairs & pairs list edge values

* `FilmPicker` widget tests

* fixed animated dialog picker tests

* add not hit files to coverage percentage

* Moved `EquipmentProfileProvider` & `FilmsProvider` to the main repo

* Synced _iap_ stub with repo

* `FilmsProvider` tests

* `EquipmentProfileProvider` tests

* Pass `availableFilms` to `FilmsProvider`

* `FilmPicker` tests

* removed unnecessary imports

* Metering layout features tests

* split integration tests by screens

* Films in use test

* mock light meter lux stream

* removed mockito mocks for integration tests

From no on these are the only mocks in use:
- Mock shared prefs initial values
- Mock platform responses (camera/light sensor)

* set sharedprefs mock without redundant group

* unified granting camera permission on Android

* fixed metering screen tests

* extracted common values

* `FilmPicker` integration tests

* fixed light sensor platform mocks

* wip

* removed integration tests for now

* moved screenshots generator to screenshots folder

* typo

* removed `MockIAPProductsProvider`

* implemented platform mocks for unit tests

* data/models/ 100% coverage

* `IsoValuePicker` tests

* `EquipmentProfileProvider` tests

* extended PR check timeout

* typo

* added storage action verification for `FilmsProvider` tests

* `UserPreferencesProvider` tests

* Update README.md

* added //coverage:ignore to `ServicesProvider`

* typo

* typo

* `toStringSignedAsFixed` tests

* `SelectableInheritedModel` tests

* removed unused `TextLineHeight` util

* `VolumeKeysNotifier` tests

* import

* `EquipmentProfileListener` tests

* typo

* split `EquipmentProfileListener` tests

* `showBuyProDialog` tests

* added `maybeOf` getter for iap stub

iap/lib/src/providers/iap_products_provider.dart

@@ -6,8 +6,10 @@ class IAPProductsProvider extends StatefulWidget {
 
   const IAPProductsProvider({required this.child, super.key});
 
-  static IAPProductsProviderState of(BuildContext context) {
-    return context.findAncestorStateOfType<IAPProductsProviderState>()!;
+  static IAPProductsProviderState of(BuildContext context) => IAPProductsProvider.maybeOf(context)!;
+
+  static IAPProductsProviderState? maybeOf(BuildContext context) {
+    return context.findAncestorStateOfType<IAPProductsProviderState>();
   }
 
   @override
@@ -54,8 +56,7 @@ class IAPProducts extends InheritedModel<IAPProductType> {
   bool updateShouldNotify(IAPProducts oldWidget) => false;
 
   @override
-  bool updateShouldNotifyDependent(IAPProducts oldWidget, Set<IAPProductType> dependencies) =>
-      false;
+  bool updateShouldNotifyDependent(IAPProducts oldWidget, Set<IAPProductType> dependencies) => false;
 
   IAPProduct? _findProduct(IAPProductType type) {
     try {

lib/data/volume_events_service.dart

@@ -3,7 +3,7 @@ import 'package:flutter/services.dart';
 import 'package:platform/platform.dart';
 
 class VolumeEventsService {
-  final LocalPlatform localPlatform;
+  final LocalPlatform _localPlatform;
 
   @visibleForTesting
   static const volumeHandlingChannel = MethodChannel("com.vodemn.lightmeter/volumeHandling");
@@ -11,12 +11,12 @@ class VolumeEventsService {
   @visibleForTesting
   static const volumeEventsChannel = EventChannel("com.vodemn.lightmeter/volumeEvents");
 
-  const VolumeEventsService(this.localPlatform);
+  const VolumeEventsService(this._localPlatform);
 
   /// If set to `false` we allow system to handle key events.
   /// Returns current status of volume handling.
   Future<bool> setVolumeHandling(bool enableHandling) async {
-    if (!localPlatform.isAndroid) {
+    if (!_localPlatform.isAndroid) {
       return false;
     }
     return volumeHandlingChannel
@@ -29,7 +29,7 @@ class VolumeEventsService {
   /// KEYCODE_VOLUME_DOWN = 25;
   /// pressed
   Stream<int> volumeButtonsEventStream() {
-    if (!localPlatform.isAndroid) {
+    if (!_localPlatform.isAndroid) {
       return const Stream.empty();
     }
     return volumeEventsChannel

lib/providers/equipment_profile_provider.dart

@@ -54,9 +54,7 @@ class EquipmentProfileProviderState extends State<EquipmentProfileProvider> {
         _defaultProfile,
         if (IAPProducts.isPurchased(context, IAPProductType.paidFeatures)) ..._customProfiles,
       ],
-      selected: IAPProducts.isPurchased(context, IAPProductType.paidFeatures)
-          ? _selectedProfile
-          : _defaultProfile,
+      selected: IAPProducts.isPurchased(context, IAPProductType.paidFeatures) ? _selectedProfile : _defaultProfile,
       child: widget.child,
     );
   }
@@ -85,7 +83,7 @@ class EquipmentProfileProviderState extends State<EquipmentProfileProvider> {
     _refreshSavedProfiles();
   }
 
-  void updateProdile(EquipmentProfile data) {
+  void updateProfile(EquipmentProfile data) {
     final indexToUpdate = _customProfiles.indexWhere((element) => element.id == data.id);
     if (indexToUpdate >= 0) {
       _customProfiles[indexToUpdate] = data;
@@ -118,13 +116,14 @@ class EquipmentProfiles extends SelectableInheritedModel<EquipmentProfile> {
 
   /// [_defaultProfile] + profiles created by the user
   static List<EquipmentProfile> of(BuildContext context) {
-    return InheritedModel.inheritFrom<EquipmentProfiles>(context, aspect: SelectableAspect.list)!
-        .values;
+    return InheritedModel.inheritFrom<EquipmentProfiles>(context, aspect: SelectableAspect.list)!.values;
   }
 
   static EquipmentProfile selectedOf(BuildContext context) {
-    return InheritedModel.inheritFrom<EquipmentProfiles>(context,
-            aspect: SelectableAspect.selected,)!
+    return InheritedModel.inheritFrom<EquipmentProfiles>(
+      context,
+      aspect: SelectableAspect.selected,
+    )!
         .selected;
   }
 }

lib/screens/metering/bloc_metering.dart

@@ -10,9 +10,9 @@ import 'package:lightmeter/screens/metering/communication/event_communication_me
     as communication_events;
 import 'package:lightmeter/screens/metering/communication/state_communication_metering.dart'
     as communication_states;
-import 'package:lightmeter/screens/metering/components/shared/volume_keys_notifier/notifier_volume_keys.dart';
 import 'package:lightmeter/screens/metering/event_metering.dart';
 import 'package:lightmeter/screens/metering/state_metering.dart';
+import 'package:lightmeter/screens/metering/utils/notifier_volume_keys.dart';
 import 'package:m3_lightmeter_resources/m3_lightmeter_resources.dart';
 
 class MeteringBloc extends Bloc<MeteringEvent, MeteringState> {

lib/screens/metering/components/camera_container/components/camera_controls/components/exposure_offset_slider/widget_slider_exposure_offset.dart

@@ -72,7 +72,7 @@ class _Ruler extends StatelessWidget {
             children: [
               if (showValue)
                 Text(
-                  (index + min).toStringSigned(),
+                  (index + min).toStringSignedAsFixed(0),
                   style: Theme.of(context).textTheme.bodyLarge,
                 ),
               const SizedBox(width: Dimens.grid8),

lib/screens/metering/flow_metering.dart

@@ -4,8 +4,8 @@ import 'package:lightmeter/interactors/metering_interactor.dart';
 import 'package:lightmeter/providers/services_provider.dart';
 import 'package:lightmeter/screens/metering/bloc_metering.dart';
 import 'package:lightmeter/screens/metering/communication/bloc_communication_metering.dart';
-import 'package:lightmeter/screens/metering/components/shared/volume_keys_notifier/notifier_volume_keys.dart';
 import 'package:lightmeter/screens/metering/screen_metering.dart';
+import 'package:lightmeter/screens/metering/utils/notifier_volume_keys.dart';
 
 class MeteringFlow extends StatefulWidget {
   const MeteringFlow({super.key});

lib/screens/metering/screen_metering.dart

@@ -13,7 +13,7 @@ import 'package:lightmeter/screens/metering/components/camera_container/provider
 import 'package:lightmeter/screens/metering/components/light_sensor_container/provider_container_light_sensor.dart';
 import 'package:lightmeter/screens/metering/event_metering.dart';
 import 'package:lightmeter/screens/metering/state_metering.dart';
-import 'package:lightmeter/screens/metering/utils/listsner_equipment_profiles.dart';
+import 'package:lightmeter/screens/metering/utils/listener_equipment_profiles.dart';
 import 'package:m3_lightmeter_resources/m3_lightmeter_resources.dart';
 
 class MeteringScreen extends StatelessWidget {

lib/screens/metering/utils/notifier_volume_keys.dart

@@ -5,12 +5,12 @@ import 'package:lightmeter/data/models/volume_action.dart';
 import 'package:lightmeter/data/volume_events_service.dart';
 
 class VolumeKeysNotifier extends ChangeNotifier with RouteAware {
-  final VolumeEventsService volumeEventsService;
+  final VolumeEventsService _volumeEventsService;
   late final StreamSubscription<VolumeKey> _volumeKeysSubscription;
   VolumeKey _value = VolumeKey.up;
 
-  VolumeKeysNotifier(this.volumeEventsService) {
-    _volumeKeysSubscription = volumeEventsService
+  VolumeKeysNotifier(this._volumeEventsService) {
+    _volumeKeysSubscription = _volumeEventsService
         .volumeButtonsEventStream()
         .map((event) => event == 24 ? VolumeKey.up : VolumeKey.down)
         .listen((event) {
@@ -19,6 +19,8 @@ class VolumeKeysNotifier extends ChangeNotifier with RouteAware {
   }
 
   VolumeKey get value => _value;
+
+  @protected
   set value(VolumeKey newValue) {
     _value = newValue;
     notifyListeners();

lib/screens/settings/components/lightmeter_pro/components/buy_pro/widget_list_tile_buy_pro.dart

@@ -4,7 +4,7 @@ import 'package:lightmeter/generated/l10n.dart';
 import 'package:lightmeter/providers/remote_config_provider.dart';
 import 'package:lightmeter/providers/services_provider.dart';
 import 'package:lightmeter/res/dimens.dart';
-import 'package:lightmeter/screens/settings/components/utils/show_buy_pro_dialog.dart';
+import 'package:lightmeter/screens/settings/utils/show_buy_pro_dialog.dart';
 import 'package:m3_lightmeter_iap/m3_lightmeter_iap.dart';
 
 class BuyProListTile extends StatelessWidget {

lib/screens/settings/components/metering/components/equipment_profiles/components/equipment_profile_screen/screen_equipment_profile.dart

@@ -90,7 +90,7 @@ class _EquipmentProfilesScreenState extends State<EquipmentProfilesScreen> {
   }
 
   void _updateProfileAt(EquipmentProfile data) {
-    EquipmentProfileProvider.of(context).updateProdile(data);
+    EquipmentProfileProvider.of(context).updateProfile(data);
   }
 
   void _removeProfileAt(EquipmentProfile data) {

lib/screens/settings/utils/show_buy_pro_dialog.dart

@@ -28,7 +28,7 @@ Future<void> showBuyProDialog(BuildContext context) {
         FilledButton(
           onPressed: () {
             Navigator.of(context).pop();
-            IAPProductsProvider.of(context).buy(IAPProductType.paidFeatures);
+            IAPProductsProvider.maybeOf(context)?.buy(IAPProductType.paidFeatures);
           },
           child: Text(unlockFeaturesEnabled ? S.of(context).unlock : S.of(context).buy),
         ),

lib/utils/text_line_height.dart

@@ -1,5 +0,0 @@
-import 'package:flutter/widgets.dart';
-
-extension TextLineHeight on TextStyle {
-  double get lineHeight => fontSize! * height!;
-}

lib/utils/to_string_signed.dart

@@ -1,13 +1,4 @@
-extension SignedString on num {
-  String toStringSigned() {
-    if (this > 0) {
-      return "+${toString()}";
-    } else {
-      return toString();
-    }
-  }
-}
-
+/// Returns value in form -1 or + 1. The only exception - 0.
 extension SignedStringDouble on double {
   String toStringSignedAsFixed(int fractionDigits) {
     if (this > 0) {

pubspec.yaml

@@ -28,7 +28,7 @@ dependencies:
   m3_lightmeter_iap:
     git:
       url: "https://github.com/vodemn/m3_lightmeter_iap"
-      ref: v0.6.3
+      ref: v0.7.0
   m3_lightmeter_resources:
     git:
       url: "https://github.com/vodemn/m3_lightmeter_resources"

test/function_mock.dart

@@ -0,0 +1,7 @@
+import 'package:mocktail/mocktail.dart';
+
+class _ValueChanged<T> {
+  void onChanged(T value) {}
+}
+
+class MockValueChanged<T> extends Mock implements _ValueChanged<T> {}

test/interactors/metering_interactor_test.dart

@@ -236,7 +236,7 @@ void main() {
   );
 
   group(
-    'Haptics',
+    'Light sensor',
     () {
       test('hasAmbientLightSensor() - true', () async {
         when(() => mockLightSensorService.hasSensor()).thenAnswer((_) async => true);

test/providers/equipment_profile_provider_test.dart

@@ -260,7 +260,7 @@ class _Application extends StatelessWidget {
         ElevatedButton(
           key: updateProfileButtonKey(profile.id),
           onPressed: () {
-            EquipmentProfileProvider.of(context).updateProdile(
+            EquipmentProfileProvider.of(context).updateProfile(
               profile.copyWith(
                 name: '${profile.name} updated',
                 isoValues: _customProfiles.first.isoValues,

test/screens/metering/bloc_metering_test.dart

@@ -7,9 +7,9 @@ import 'package:lightmeter/screens/metering/communication/event_communication_me
     as communication_events;
 import 'package:lightmeter/screens/metering/communication/state_communication_metering.dart'
     as communication_states;
-import 'package:lightmeter/screens/metering/components/shared/volume_keys_notifier/notifier_volume_keys.dart';
 import 'package:lightmeter/screens/metering/event_metering.dart';
 import 'package:lightmeter/screens/metering/state_metering.dart';
+import 'package:lightmeter/screens/metering/utils/notifier_volume_keys.dart';
 import 'package:m3_lightmeter_resources/m3_lightmeter_resources.dart';
 import 'package:mocktail/mocktail.dart';
 import 'package:test/test.dart';

test/screens/metering/components/shared/readings_container/shared/dialog_picker_test.dart

@@ -7,16 +7,11 @@ import 'package:lightmeter/screens/metering/components/shared/readings_container
 import 'package:mocktail/mocktail.dart';
 
 import '../../../../../../application_mock.dart';
+import '../../../../../../function_mock.dart';
 import '../utils.dart';
 
-class _ValueChanged {
-  void onChanged<T>(T value) {}
-}
-
-class _MockValueChanged extends Mock implements _ValueChanged {}
-
 void main() {
-  final functions = _MockValueChanged();
+  final functions = MockValueChanged<int>();
 
   group(
     'onChanged',

test/screens/metering/utils/listener_equipment_profiles_test.dart

@@ -0,0 +1,138 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:lightmeter/providers/equipment_profile_provider.dart';
+import 'package:lightmeter/screens/metering/utils/listener_equipment_profiles.dart';
+import 'package:m3_lightmeter_iap/m3_lightmeter_iap.dart';
+import 'package:m3_lightmeter_resources/m3_lightmeter_resources.dart';
+import 'package:mocktail/mocktail.dart';
+
+import '../../../function_mock.dart';
+
+class _MockIAPStorageService extends Mock implements IAPStorageService {}
+
+void main() {
+  TestWidgetsFlutterBinding.ensureInitialized();
+  final storageService = _MockIAPStorageService();
+  final equipmentProfileProviderKey = GlobalKey<EquipmentProfileProviderState>();
+  final onDidChangeDependencies = MockValueChanged<EquipmentProfile>();
+
+  tearDown(() {
+    reset(onDidChangeDependencies);
+    reset(storageService);
+  });
+
+  Future<void> pumpTestWidget(WidgetTester tester) async {
+    await tester.pumpWidget(
+      IAPProducts(
+        products: [
+          IAPProduct(
+            storeId: IAPProductType.paidFeatures.storeId,
+            status: IAPProductStatus.purchased,
+          ),
+        ],
+        child: EquipmentProfileProvider(
+          key: equipmentProfileProviderKey,
+          storageService: storageService,
+          child: MaterialApp(
+            home: EquipmentProfileListener(
+              onDidChangeDependencies: onDidChangeDependencies.onChanged,
+              child: Builder(builder: (context) => Text(EquipmentProfiles.selectedOf(context).name)),
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+
+  testWidgets(
+    'Trigger `onDidChangeDependencies` by selecting a new profile',
+    (tester) async {
+      when(() => storageService.equipmentProfiles).thenReturn(List.from(_customProfiles));
+      when(() => storageService.selectedEquipmentProfileId).thenReturn('');
+      await pumpTestWidget(tester);
+
+      equipmentProfileProviderKey.currentState!.setProfile(_customProfiles[0]);
+      await tester.pump();
+      verify(() => onDidChangeDependencies.onChanged(_customProfiles[0])).called(1);
+    },
+  );
+
+  testWidgets(
+    'Trigger `onDidChangeDependencies` by updating the selected profile',
+    (tester) async {
+      when(() => storageService.equipmentProfiles).thenReturn(List.from(_customProfiles));
+      when(() => storageService.selectedEquipmentProfileId).thenReturn(_customProfiles[0].id);
+      await pumpTestWidget(tester);
+
+      final updatedProfile1 = _customProfiles[0].copyWith(name: 'Test 1 updated');
+      equipmentProfileProviderKey.currentState!.updateProfile(updatedProfile1);
+      await tester.pump();
+      verify(() => onDidChangeDependencies.onChanged(updatedProfile1)).called(1);
+
+      /// Verify that updating the not selected profile doesn't trigger the callback
+      final updatedProfile2 = _customProfiles[1].copyWith(name: 'Test 2 updated');
+      equipmentProfileProviderKey.currentState!.updateProfile(updatedProfile2);
+      await tester.pump();
+      verifyNever(() => onDidChangeDependencies.onChanged(updatedProfile2));
+    },
+  );
+
+  testWidgets(
+    "Don't trigger `onDidChangeDependencies` by updating the unselected profile",
+    (tester) async {
+      when(() => storageService.equipmentProfiles).thenReturn(List.from(_customProfiles));
+      when(() => storageService.selectedEquipmentProfileId).thenReturn(_customProfiles[0].id);
+      await pumpTestWidget(tester);
+
+      final updatedProfile2 = _customProfiles[1].copyWith(name: 'Test 2 updated');
+      equipmentProfileProviderKey.currentState!.updateProfile(updatedProfile2);
+      await tester.pump();
+      verifyNever(() => onDidChangeDependencies.onChanged(updatedProfile2));
+    },
+  );
+}
+
+final List<EquipmentProfile> _customProfiles = [
+  const EquipmentProfile(
+    id: '1',
+    name: 'Test 1',
+    apertureValues: [
+      ApertureValue(4.0, StopType.full),
+      ApertureValue(4.5, StopType.third),
+      ApertureValue(4.8, StopType.half),
+      ApertureValue(5.0, StopType.third),
+      ApertureValue(5.6, StopType.full),
+      ApertureValue(6.3, StopType.third),
+      ApertureValue(6.7, StopType.half),
+      ApertureValue(7.1, StopType.third),
+      ApertureValue(8, StopType.full),
+    ],
+    ndValues: [
+      NdValue(0),
+      NdValue(2),
+      NdValue(4),
+      NdValue(8),
+      NdValue(16),
+      NdValue(32),
+      NdValue(64),
+    ],
+    shutterSpeedValues: ShutterSpeedValue.values,
+    isoValues: [
+      IsoValue(100, StopType.full),
+      IsoValue(125, StopType.third),
+      IsoValue(160, StopType.third),
+      IsoValue(200, StopType.full),
+      IsoValue(250, StopType.third),
+      IsoValue(320, StopType.third),
+      IsoValue(400, StopType.full),
+    ],
+  ),
+  const EquipmentProfile(
+    id: '2',
+    name: 'Test 2',
+    apertureValues: ApertureValue.values,
+    ndValues: NdValue.values,
+    shutterSpeedValues: ShutterSpeedValue.values,
+    isoValues: IsoValue.values,
+  ),
+];

test/screens/metering/utils/notifier_volume_keys_test.dart

@@ -0,0 +1,46 @@
+import 'dart:async';
+
+import 'package:lightmeter/data/models/volume_action.dart';
+import 'package:lightmeter/data/volume_events_service.dart';
+import 'package:lightmeter/screens/metering/utils/notifier_volume_keys.dart';
+import 'package:mocktail/mocktail.dart';
+import 'package:test/test.dart';
+
+import '../../../function_mock.dart';
+
+class _MockVolumeEventsService extends Mock implements VolumeEventsService {}
+
+void main() {
+  late _MockVolumeEventsService mockVolumeEventsService;
+
+  setUp(() {
+    mockVolumeEventsService = _MockVolumeEventsService();
+  });
+
+  test(
+    'Listen to `volumeButtonsEventStream()`',
+    () async {
+      final StreamController<int> volumeButtonsEvents = StreamController<int>();
+      when(() => mockVolumeEventsService.volumeButtonsEventStream()).thenAnswer((_) => volumeButtonsEvents.stream);
+
+      final volumeKeysNotifier = VolumeKeysNotifier(mockVolumeEventsService);
+      final functions = MockValueChanged<VolumeKey>();
+      volumeKeysNotifier.addListener(() => functions.onChanged(volumeKeysNotifier.value));
+      expect(volumeKeysNotifier.value, VolumeKey.up);
+
+      volumeButtonsEvents.add(25);
+      volumeButtonsEvents.add(25);
+      volumeButtonsEvents.add(25);
+      volumeButtonsEvents.add(24);
+      volumeButtonsEvents.add(24);
+      volumeButtonsEvents.add(25);
+      await Future.delayed(Duration.zero);
+      verify(() => functions.onChanged(VolumeKey.up)).called(2);
+      verify(() => functions.onChanged(VolumeKey.down)).called(4);
+
+      volumeKeysNotifier.removeListener(() => functions.onChanged(volumeKeysNotifier.value));
+      await volumeKeysNotifier.dispose();
+      await volumeButtonsEvents.close();
+    },
+  );
+}

test/screens/settings/utils/show_buy_pro_dialog_test.dart

@@ -0,0 +1,61 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:lightmeter/data/models/feature.dart';
+import 'package:lightmeter/generated/l10n.dart';
+import 'package:lightmeter/providers/remote_config_provider.dart';
+import 'package:lightmeter/screens/settings/utils/show_buy_pro_dialog.dart';
+
+import '../../../application_mock.dart';
+
+void main() {
+  Future<void> pumpApplication(WidgetTester tester) async {
+    await tester.pumpWidget(
+      RemoteConfig(
+        config: const {Feature.unlockProFeaturesText: false},
+        child: WidgetTestApplicationMock(
+          child: Builder(
+            builder: (context) => ElevatedButton(
+              onPressed: () => showBuyProDialog(context),
+              child: const SizedBox(),
+            ),
+          ),
+        ),
+      ),
+    );
+    await tester.pumpAndSettle();
+  }
+
+  testWidgets(
+    '`showBuyProDialog` and buy',
+    (tester) async {
+      await pumpApplication(tester);
+      await tester.tap(find.byType(ElevatedButton));
+      await tester.pumpAndSettle();
+      expect(find.byType(AlertDialog), findsOneWidget);
+      expect(find.text(S.current.lightmeterPro), findsOneWidget);
+      expect(find.text(S.current.cancel), findsOneWidget);
+      expect(find.text(S.current.buy), findsOneWidget);
+
+      await tester.tap(find.text(S.current.buy));
+      await tester.pumpAndSettle();
+      expect(find.byType(AlertDialog), findsNothing);
+    },
+  );
+
+  testWidgets(
+    '`showBuyProDialog` and cancel',
+    (tester) async {
+      await pumpApplication(tester);
+      await tester.tap(find.byType(ElevatedButton));
+      await tester.pumpAndSettle();
+      expect(find.byType(AlertDialog), findsOneWidget);
+      expect(find.text(S.current.lightmeterPro), findsOneWidget);
+      expect(find.text(S.current.cancel), findsOneWidget);
+      expect(find.text(S.current.buy), findsOneWidget);
+
+      await tester.tap(find.text(S.current.cancel));
+      await tester.pumpAndSettle();
+      expect(find.byType(AlertDialog), findsNothing);
+    },
+  );
+}

test/utils/selectable_provider_test.dart

@@ -0,0 +1,76 @@
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:lightmeter/utils/selectable_provider.dart';
+
+void main() {
+  group('SelectableInheritedModel.updateShouldNotifyDependent', () {
+    final model = SelectableInheritedModel<int>(
+      values: List.generate(25, (index) => index),
+      selected: 1,
+      child: const SizedBox(),
+    );
+
+    test(
+      '`{}`',
+      () {
+        expect(
+          model.updateShouldNotifyDependent(
+            SelectableInheritedModel<int>(
+              values: List.generate(25, (index) => index),
+              selected: 1,
+              child: const SizedBox(),
+            ),
+            {},
+          ),
+          false,
+        );
+      },
+    );
+
+    test(
+      '`{SelectableAspect.list}`',
+      () {
+        expect(
+          model.updateShouldNotifyDependent(
+            SelectableInheritedModel<int>(
+              values: List.generate(25, (index) => index),
+              selected: 1,
+              child: const SizedBox(),
+            ),
+            {SelectableAspect.list},
+          ),
+          true,
+        );
+      },
+    );
+
+    test(
+      '`{SelectableAspect.selected}`',
+      () {
+        expect(
+          model.updateShouldNotifyDependent(
+            SelectableInheritedModel<int>(
+              values: List.generate(25, (index) => index),
+              selected: 1,
+              child: const SizedBox(),
+            ),
+            {SelectableAspect.selected},
+          ),
+          false,
+        );
+        expect(
+          model.updateShouldNotifyDependent(
+            SelectableInheritedModel<int>(
+              values: List.generate(25, (index) => index),
+              selected: 2,
+              child: const SizedBox(),
+            ),
+            {SelectableAspect.selected},
+          ),
+          true,
+        );
+      },
+    );
+  });
+}

test/utils/to_string_signed_test.dart

@@ -0,0 +1,16 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:lightmeter/utils/to_string_signed.dart';
+
+void main() {
+  test('toStringSignedAsFixed(0)', () {
+    expect(1.5.toStringSignedAsFixed(0), '+2');
+    expect((-1.5).toStringSignedAsFixed(0), '-2');
+    expect(0.0.toStringSignedAsFixed(0), '0');
+  });
+
+  test('toStringSignedAsFixed(1)', () {
+    expect(1.5.toStringSignedAsFixed(1), '+1.5');
+    expect((-1.5).toStringSignedAsFixed(1), '-1.5');
+    expect(0.0.toStringSignedAsFixed(1), '0.0');
+  });
+}