test granting and revoking pro features

integration_test/mocks/iap_products_mock.dart

@@ -0,0 +1,45 @@
+import 'package:flutter/material.dart';
+import 'package:m3_lightmeter_iap/m3_lightmeter_iap.dart';
+
+@visibleForTesting
+class MockIAPProductsProvider extends StatefulWidget {
+  final bool initialyPurchased;
+  final Widget child;
+
+  const MockIAPProductsProvider({this.initialyPurchased = true, required this.child, super.key});
+
+  static MockIAPProductsProviderState of(BuildContext context) => MockIAPProductsProvider.maybeOf(context)!;
+
+  static MockIAPProductsProviderState? maybeOf(BuildContext context) {
+    return context.findAncestorStateOfType<MockIAPProductsProviderState>();
+  }
+
+  @override
+  State<MockIAPProductsProvider> createState() => MockIAPProductsProviderState();
+}
+
+class MockIAPProductsProviderState extends State<MockIAPProductsProvider> {
+  late bool _purchased = widget.initialyPurchased;
+  @override
+  Widget build(BuildContext context) {
+    return IAPProducts(
+      products: List.from([
+        IAPProduct(
+          storeId: IAPProductType.paidFeatures.storeId,
+          status: _purchased ? IAPProductStatus.purchased : IAPProductStatus.purchasable,
+        )
+      ]),
+      child: widget.child,
+    );
+  }
+
+  void buy() {
+    _purchased = true;
+    setState(() {});
+  }
+
+  void clearPurchases() {
+    _purchased = false;
+    setState(() {});
+  }
+}

integration_test/purchases_test.dart

@@ -0,0 +1,122 @@
+import 'dart:convert';
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:integration_test/integration_test.dart';
+import 'package:lightmeter/data/models/ev_source_type.dart';
+import 'package:lightmeter/data/models/metering_screen_layout_config.dart';
+import 'package:lightmeter/data/shared_prefs_service.dart';
+import 'package:lightmeter/generated/l10n.dart';
+import 'package:lightmeter/res/dimens.dart';
+import 'package:lightmeter/screens/metering/components/bottom_controls/components/measure_button/widget_button_measure.dart';
+import 'package:lightmeter/screens/metering/components/shared/readings_container/components/equipment_profile_picker/widget_picker_equipment_profiles.dart';
+import 'package:lightmeter/screens/metering/components/shared/readings_container/components/extreme_exposure_pairs_container/widget_container_extreme_exposure_pairs.dart';
+import 'package:lightmeter/screens/metering/components/shared/readings_container/components/film_picker/widget_picker_film.dart';
+import 'package:lightmeter/screens/metering/components/shared/readings_container/components/iso_picker/widget_picker_iso.dart';
+import 'package:lightmeter/screens/metering/components/shared/readings_container/components/nd_picker/widget_picker_nd.dart';
+import 'package:lightmeter/screens/settings/components/shared/disable/widget_disable.dart';
+import 'package:lightmeter/screens/settings/screen_settings.dart';
+import 'package:m3_lightmeter_iap/m3_lightmeter_iap.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+import '../integration_test/utils/widget_tester_actions.dart';
+import 'mocks/iap_products_mock.dart';
+
+void main() {
+  IntegrationTestWidgetsFlutterBinding.ensureInitialized();
+
+  void mockSharedPrefs() {
+    // ignore: invalid_use_of_visible_for_testing_member
+    SharedPreferences.setMockInitialValues({
+      /// Metering values
+      UserPreferencesService.evSourceTypeKey: EvSourceType.camera.index,
+      UserPreferencesService.showEv100Key: true,
+      UserPreferencesService.meteringScreenLayoutKey: json.encode(
+        {
+          MeteringScreenLayoutFeature.equipmentProfiles: true,
+          MeteringScreenLayoutFeature.extremeExposurePairs: true,
+          MeteringScreenLayoutFeature.filmPicker: true,
+        }.toJson(),
+      ),
+    });
+  }
+
+  setUpAll(() {
+    mockSharedPrefs();
+  });
+
+  /// Generates several screenshots with the light theme
+  testWidgets(
+    'Purchase & refund premium features',
+    (tester) async {
+      await tester.pumpApplication(productStatus: IAPProductStatus.purchasable);
+      await tester.takePhoto();
+
+      /// Expect the bare minimum free functionallity
+      _expectProMeteringScreen(enabled: false);
+
+      /// Check, that premium settings are disabled
+      await tester.tap(find.byTooltip(S.current.tooltipOpenSettings));
+      await tester.pumpAndSettle();
+      await _expectProSettingsScreen(tester, enabled: false);
+
+      /// Make purchase
+      (tester.state(find.byType(MockIAPProductsProvider)) as MockIAPProductsProviderState).buy();
+      await tester.pumpAndSettle();
+
+      /// Check, that premium settings are enabled
+      await _expectProSettingsScreen(tester, enabled: true);
+
+      /// Expect, that all the premium controls are now available to user
+      (tester.state(find.byType(Navigator)) as NavigatorState).pop();
+      await tester.pumpAndSettle(Dimens.durationML);
+      _expectProMeteringScreen(enabled: true);
+
+      /// Refund
+      (tester.state(find.byType(MockIAPProductsProvider)) as MockIAPProductsProviderState).clearPurchases();
+      await tester.pumpAndSettle();
+
+      /// Expect the bare minimum free functionallity
+      _expectProMeteringScreen(enabled: false);
+
+      /// Check, that premium settings are disabled
+      await tester.tap(find.byTooltip(S.current.tooltipOpenSettings));
+      await tester.pumpAndSettle();
+      await _expectProSettingsScreen(tester, enabled: false);
+    },
+  );
+}
+
+void _expectProMeteringScreen({required bool enabled}) {
+  expect(find.byType(EquipmentProfilePicker), enabled ? findsOneWidget : findsNothing);
+  expect(find.byType(ExtremeExposurePairsContainer), findsOneWidget);
+  expect(find.byType(FilmPicker), enabled ? findsOneWidget : findsNothing);
+  expect(find.byType(IsoValuePicker), findsOneWidget);
+  expect(find.byType(NdValuePicker), findsOneWidget);
+  expect(
+    find.descendant(
+      of: find.byType(MeteringMeasureButton),
+      matching: find.byWidgetPredicate((widget) => widget is Text && widget.data!.contains('\u2081\u2080\u2080')),
+    ),
+    enabled ? findsOneWidget : findsNothing,
+  );
+}
+
+Future<void> _expectProSettingsScreen(WidgetTester tester, {required bool enabled}) async {
+  void expectDisabled(String title, bool disabled) {
+    find.ancestor(
+      of: find.text(title),
+      matching: find.byWidgetPredicate((widget) => widget is Disable && widget.disable == disabled),
+    );
+  }
+
+  expectDisabled(S.current.showEv100, !enabled);
+  expectDisabled(S.current.equipmentProfiles, !enabled);
+  expectDisabled(S.current.filmsInUse, !enabled);
+  expectDisabled(S.current.cameraFeatures, !enabled);
+  await tester.tapDescendantTextOf<SettingsScreen>(S.current.meteringScreenLayout);
+  expectDisabled(S.current.meteringScreenLayoutHintEquipmentProfiles, !enabled);
+  expectDisabled(S.current.meteringScreenFeatureExtremeExposurePairs, false); // must be always enabled
+  expectDisabled(S.current.meteringScreenFeatureFilmPicker, !enabled);
+  await tester.tapCancelButton();
+}

integration_test/utils/widget_tester_actions.dart

@@ -9,6 +9,7 @@ import 'package:lightmeter/screens/metering/components/bottom_controls/component
 import 'package:m3_lightmeter_iap/m3_lightmeter_iap.dart';
 import 'package:m3_lightmeter_resources/m3_lightmeter_resources.dart';
 
+import '../mocks/iap_products_mock.dart';
 import '../mocks/paid_features_mock.dart';
 import 'platform_channel_mock.dart';
 
@@ -19,13 +20,8 @@ extension WidgetTesterCommonActions on WidgetTester {
     Film selectedFilm = const Film.other(),
   }) async {
     await pumpWidget(
-      IAPProducts(
-        products: [
-          IAPProduct(
-            storeId: IAPProductType.paidFeatures.storeId,
-            status: productStatus,
-          ),
-        ],
+      MockIAPProductsProvider(
+        initialyPurchased: productStatus == IAPProductStatus.purchased,
         child: ApplicationWrapper(
           const Environment.dev(),
           child: MockIAPProviders(