implemented MeteringScreen golden test

lib/data/light_sensor_service.dart

@@ -7,7 +7,7 @@ class LightSensorService {
   const LightSensorService(this.localPlatform);
 
   Future<bool> hasSensor() async {
-    if (!localPlatform.isAndroid) {
+    if (localPlatform.isIOS) {
       return false;
     }
     try {
@@ -18,7 +18,7 @@ class LightSensorService {
   }
 
   Stream<int> luxStream() {
-    if (!localPlatform.isAndroid) {
+    if (localPlatform.isIOS) {
       return const Stream<int>.empty();
     }
     return LightSensor.luxStream();

test/screens/metering/screen_metering_golden_test.dart

@@ -0,0 +1,164 @@
+import 'dart:convert';
+
+import 'package:flutter/widgets.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:golden_toolkit/golden_toolkit.dart';
+import 'package:light_sensor/light_sensor.dart';
+import 'package:lightmeter/data/models/ev_source_type.dart';
+import 'package:lightmeter/data/models/metering_screen_layout_config.dart';
+import 'package:lightmeter/data/models/theme_type.dart';
+import 'package:lightmeter/data/shared_prefs_service.dart';
+import 'package:lightmeter/providers/user_preferences_provider.dart';
+import 'package:lightmeter/screens/metering/components/bottom_controls/components/measure_button/widget_button_measure.dart';
+import 'package:lightmeter/screens/metering/flow_metering.dart';
+import 'package:m3_lightmeter_iap/m3_lightmeter_iap.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+import '../../../integration_test/utils/platform_channel_mock.dart';
+import '../../application_mock.dart';
+
+class _MeteringScreenConfig {
+  final IAPProductStatus iapProductStatus;
+  final EvSourceType evSourceType;
+
+  _MeteringScreenConfig(
+    this.iapProductStatus,
+    this.evSourceType,
+  );
+
+  @override
+  String toString() {
+    final buffer = StringBuffer();
+    buffer.write(iapProductStatus.toString().split('.')[1]);
+    buffer.write(' - ');
+    buffer.write(evSourceType.toString().split('.')[1]);
+    return buffer.toString();
+  }
+}
+
+final _testScenarios = [IAPProductStatus.purchased, IAPProductStatus.purchasable].expand(
+  (iapProductStatus) => EvSourceType.values.map(
+    (evSourceType) => _MeteringScreenConfig(iapProductStatus, evSourceType),
+  ),
+);
+
+void main() {
+  Future<void> setEvSource(WidgetTester tester, Key scenarioWidgetKey, EvSourceType evSourceType) async {
+    final flow = find.descendant(
+      of: find.byKey(scenarioWidgetKey),
+      matching: find.byType(MeteringFlow),
+    );
+    final BuildContext context = tester.element(flow);
+    if (UserPreferencesProvider.evSourceTypeOf(context) != evSourceType) {
+      UserPreferencesProvider.of(context).toggleEvSourceType();
+    }
+    await tester.pumpAndSettle();
+  }
+
+  Future<void> setTheme(WidgetTester tester, Key scenarioWidgetKey, ThemeType themeType) async {
+    final flow = find.descendant(
+      of: find.byKey(scenarioWidgetKey),
+      matching: find.byType(MeteringFlow),
+    );
+    final BuildContext context = tester.element(flow);
+    UserPreferencesProvider.of(context).setThemeType(themeType);
+    await tester.pumpAndSettle();
+  }
+
+  Future<void> takePhoto(WidgetTester tester, Key scenarioWidgetKey) async {
+    final button = find.descendant(
+      of: find.byKey(scenarioWidgetKey),
+      matching: find.byType(MeteringMeasureButton),
+    );
+    await tester.tap(button);
+    await tester.pump(const Duration(seconds: 2)); // wait for circular progress indicator
+    await tester.pump(const Duration(seconds: 1)); // wait for circular progress indicator
+    await tester.pumpAndSettle();
+  }
+
+  Future<void> toggleIncidentMetering(WidgetTester tester, Key scenarioWidgetKey, double ev) async {
+    final button = find.descendant(
+      of: find.byKey(scenarioWidgetKey),
+      matching: find.byType(MeteringMeasureButton),
+    );
+    await tester.tap(button);
+    await sendMockIncidentEv(ev);
+    await tester.tap(button);
+    await tester.pumpAndSettle();
+  }
+
+  setUpAll(() {
+    SharedPreferences.setMockInitialValues({
+      UserPreferencesService.evSourceTypeKey: EvSourceType.camera.index,
+      UserPreferencesService.meteringScreenLayoutKey: json.encode(
+        {
+          MeteringScreenLayoutFeature.equipmentProfiles: true,
+          MeteringScreenLayoutFeature.extremeExposurePairs: true,
+          MeteringScreenLayoutFeature.filmPicker: true,
+        }.toJson(),
+      ),
+    });
+    TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger.setMockMethodCallHandler(
+      LightSensor.methodChannel,
+      (methodCall) async {
+        switch (methodCall.method) {
+          case "sensor":
+            return true;
+          default:
+            return null;
+        }
+      },
+    );
+    setupLightSensorStreamHandler();
+  });
+
+  tearDownAll(() {
+    TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger.setMockMethodCallHandler(
+      LightSensor.methodChannel,
+      null,
+    );
+  });
+
+  testGoldens(
+    'MeteringScreen golden test',
+    (tester) async {
+      final builder = DeviceBuilder();
+      for (final scenario in _testScenarios) {
+        builder.addScenario(
+          name: scenario.toString(),
+          widget: _MockMeteringFlow(productStatus: scenario.iapProductStatus),
+          onCreate: (scenarioWidgetKey) async {
+            await setEvSource(tester, scenarioWidgetKey, scenario.evSourceType);
+            if (scenarioWidgetKey.toString().contains('Dark')) {
+              await setTheme(tester, scenarioWidgetKey, ThemeType.dark);
+            }
+            if (scenario.evSourceType == EvSourceType.camera) {
+              await takePhoto(tester, scenarioWidgetKey);
+            } else {
+              await toggleIncidentMetering(tester, scenarioWidgetKey, 7.3);
+            }
+          },
+        );
+      }
+      await tester.pumpDeviceBuilder(builder);
+      await screenMatchesGolden(
+        tester,
+        'metering_screen',
+      );
+    },
+  );
+}
+
+class _MockMeteringFlow extends StatelessWidget {
+  final IAPProductStatus productStatus;
+
+  const _MockMeteringFlow({required this.productStatus});
+
+  @override
+  Widget build(BuildContext context) {
+    return GoldenTestApplicationMock(
+      productStatus: productStatus,
+      child: const MeteringFlow(),
+    );
+  }
+}