ML-166 Golden tests (#167)

* setup golden toolkit

* implemented `GoldenTestApplicationMock`

* added devices with dark theme

* implemented MeteringScreen golden test

* moved platform channel logic to app mock

* implemented SettingsScreen golden test

* gitignore golden tests failures

* Create dart_test.yaml

* adjusted `RulerSlider` ticks height

* set master screenshots

* run golden tests on ci

* fixed `LightSensorService` tests

* removed golden workflow call from PR check

* Update pr_check.yml

.github/workflows/pr_check.yml

@@ -12,9 +12,9 @@ on:
     branches: ["main"]
 
 jobs:
-  analyze_and_test:
+  analyze-and-test:
     name: Analyze & test
-    runs-on: macos-11
+    runs-on: macos-latest
     timeout-minutes: 10
     steps:
       - uses: 8BitJonny/gh-get-current-pr@2.2.0
@@ -54,7 +54,7 @@ jobs:
         run: flutter analyze lib --fatal-infos
 
       - name: Run tests
-        run: flutter test
+        run: flutter test --dart-define cameraStubImage=assets/camera_stub_image.jpg
 
       - name: Analyze project source with stub
         if: steps.override-iap.conclusion != 'success'

.github/workflows/run_golden_tests.yml

@@ -0,0 +1,62 @@
+# This workflow uses actions that are not certified by GitHub.
+# They are provided by a third-party and are governed by
+# separate terms of service, privacy policy, and support
+# documentation.
+
+name: Run golden tests
+
+on:
+  workflow_dispatch:
+    inputs:
+      update-goldens:
+        type: boolean
+        description: Update goldens
+        default: false
+
+jobs:
+  run-golden-tests:
+    name: Run golden tests
+    timeout-minutes: 5
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          submodules: recursive
+
+      - uses: subosito/flutter-action@v2
+        with:
+          channel: "stable"
+          flutter-version: "3.13.9"
+
+      - name: Prepare app
+        run: |
+          flutter --version
+          flutter pub get
+          flutter pub run intl_utils:generate
+
+      - name: Run tests
+        env:
+          UPDATE_GOLDENS: ${{inputs.update-goldens && '--update-goldens' || '' }}ƒ
+        run: |
+          goldens=$(find ./test -name "*_golden_test.dart" -print)
+          for f in $goldens; do
+            flutter test "$f"\
+                --dart-define cameraStubImage=assets/camera_stub_image.jpg \
+                $UPDATE_GOLDENS
+          done
+
+      - name: Commit changes
+        if: ${{ inputs.update-goldens }}
+        run: |
+          git config --local user.email "github-actions[bot]@users.noreply.github.com"
+          git config --local user.name "github-actions[bot]"
+          git add -A
+          git commit -m "Updated goldens"
+
+      - name: Push to main
+        if: ${{ inputs.update-goldens }}
+        uses: CasperWA/push-protected@v2
+        with:
+          token: ${{ secrets.PUSH_TO_MAIN_TOKEN }}
+          branch: ${{ github.ref_name }}
+          unprotect_reviews: true

.gitignore

@@ -62,4 +62,5 @@ ios/Runner/GoogleService-Info.plist
 
 coverage/
 test/coverage_helper_test.dart
+**/failures/*.png
 screenshots/generated/

dart_test.yaml

@@ -0,0 +1,2 @@
+tags:
+  golden:

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();

lib/screens/shared/ruler_slider/widget_slider_ruler.dart

@@ -77,43 +77,48 @@ class _Ruler extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    final mainTicksFontSize = Theme.of(context).textTheme.bodySmall!.fontSize!;
     return LayoutBuilder(
       builder: (context, constraints) {
-        final bool showAllMainTicks = Dimens.cameraSliderHandleArea * mainTicksCount <= constraints.maxHeight;
-        return Column(
-          crossAxisAlignment: CrossAxisAlignment.end,
-          mainAxisAlignment: MainAxisAlignment.spaceBetween,
-          children: List.generate(
-            itemsCount,
-            (index) {
-              final bool isMainTick = index % 2 == 0.0;
-              if (!showAllMainTicks && !isMainTick) {
-                return const SizedBox();
-              }
-              final bool showValue = (index % (showAllMainTicks ? 2 : 4) == 0.0);
-              return SizedBox(
-                height: index == itemsCount - 1 || showValue ? Dimens.cameraSliderHandleArea : 1,
-                child: Row(
-                  mainAxisAlignment: MainAxisAlignment.end,
-                  children: [
-                    if (showValue)
-                      Text(
-                        rulerValueAdapter(index / 2 + min),
-                        style: Theme.of(context).textTheme.bodySmall,
+        final bool showAllMainTicks =
+            mainTicksFontSize * mainTicksCount + (1 * mainTicksCount - 1) <= constraints.maxHeight;
+        return Padding(
+          padding: EdgeInsets.symmetric(vertical: (Dimens.cameraSliderHandleArea - mainTicksFontSize) / 2),
+          child: Column(
+            crossAxisAlignment: CrossAxisAlignment.end,
+            mainAxisAlignment: MainAxisAlignment.spaceBetween,
+            children: List.generate(
+              itemsCount,
+              (index) {
+                final bool isMainTick = index % 2 == 0.0;
+                if (!showAllMainTicks && !isMainTick) {
+                  return const SizedBox();
+                }
+                final bool showValue = (index % (showAllMainTicks ? 2 : 4) == 0.0);
+                return SizedBox(
+                  height: index == itemsCount - 1 || showValue ? mainTicksFontSize : 1,
+                  child: Row(
+                    mainAxisAlignment: MainAxisAlignment.end,
+                    children: [
+                      if (showValue)
+                        Text(
+                          rulerValueAdapter(index / 2 + min),
+                          style: Theme.of(context).textTheme.bodySmall,
+                        ),
+                      const SizedBox(width: Dimens.grid4),
+                      ColoredBox(
+                        color: Theme.of(context).colorScheme.onBackground,
+                        child: SizedBox(
+                          height: 1,
+                          width: isMainTick ? Dimens.grid8 : Dimens.grid4,
+                        ),
                       ),
-                    const SizedBox(width: Dimens.grid4),
-                    ColoredBox(
-                      color: Theme.of(context).colorScheme.onBackground,
-                      child: SizedBox(
-                        height: 1,
-                        width: isMainTick ? Dimens.grid8 : Dimens.grid4,
-                      ),
-                    ),
-                  ],
-                ),
-              );
-            },
-          ).reversed.toList(),
+                    ],
+                  ),
+                );
+              },
+            ).reversed.toList(),
+          ),
         );
       },
     );

pubspec.yaml

@@ -49,6 +49,7 @@ dev_dependencies:
   flutter_native_splash: 2.3.5
   flutter_test:
     sdk: flutter
+  golden_toolkit: 0.15.0
   google_fonts: 3.0.1
   integration_test:
     sdk: flutter

test/application_mock.dart

@@ -1,16 +1,23 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_localizations/flutter_localizations.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:light_sensor/light_sensor.dart';
+import 'package:lightmeter/application_wrapper.dart';
+import 'package:lightmeter/data/models/supported_locale.dart';
+import 'package:lightmeter/environment.dart';
 import 'package:lightmeter/generated/l10n.dart';
+import 'package:lightmeter/providers/user_preferences_provider.dart';
 import 'package:lightmeter/res/theme.dart';
 import 'package:m3_lightmeter_iap/m3_lightmeter_iap.dart';
 
+import '../integration_test/mocks/paid_features_mock.dart';
+import '../integration_test/utils/platform_channel_mock.dart';
+
 /// Provides [MaterialApp] with default theme and "en" localization
 class WidgetTestApplicationMock extends StatelessWidget {
-  final IAPProductStatus productStatus;
   final Widget child;
 
   const WidgetTestApplicationMock({
-    this.productStatus = IAPProductStatus.purchased,
     required this.child,
     super.key,
   });
@@ -35,3 +42,86 @@ class WidgetTestApplicationMock extends StatelessWidget {
     );
   }
 }
+
+class GoldenTestApplicationMock extends StatefulWidget {
+  final IAPProductStatus productStatus;
+  final Widget child;
+
+  const GoldenTestApplicationMock({
+    this.productStatus = IAPProductStatus.purchased,
+    required this.child,
+    super.key,
+  });
+
+  @override
+  State<GoldenTestApplicationMock> createState() => _GoldenTestApplicationMockState();
+}
+
+class _GoldenTestApplicationMockState extends State<GoldenTestApplicationMock> {
+  @override
+  void initState() {
+    super.initState();
+    TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger.setMockMethodCallHandler(
+      LightSensor.methodChannel,
+      (methodCall) async {
+        switch (methodCall.method) {
+          case "sensor":
+            return true;
+          default:
+            return null;
+        }
+      },
+    );
+    setupLightSensorStreamHandler();
+  }
+
+  @override
+  void dispose() {
+    TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger.setMockMethodCallHandler(
+      LightSensor.methodChannel,
+      null,
+    );
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return IAPProducts(
+      products: [
+        IAPProduct(
+          storeId: IAPProductType.paidFeatures.storeId,
+          status: widget.productStatus,
+        ),
+      ],
+      child: ApplicationWrapper(
+        const Environment.dev(),
+        child: MockIAPProviders(
+          equipmentProfiles: mockEquipmentProfiles,
+          selectedEquipmentProfileId: mockEquipmentProfiles.first.id,
+          films: films,
+          child: Builder(
+            builder: (context) {
+              return MaterialApp(
+                debugShowCheckedModeBanner: false,
+                theme: UserPreferencesProvider.themeOf(context),
+                locale: Locale(UserPreferencesProvider.localeOf(context).intlName),
+                localizationsDelegates: const [
+                  S.delegate,
+                  GlobalMaterialLocalizations.delegate,
+                  GlobalWidgetsLocalizations.delegate,
+                  GlobalCupertinoLocalizations.delegate,
+                ],
+                supportedLocales: S.delegate.supportedLocales,
+                builder: (context, child) => MediaQuery(
+                  data: MediaQuery.of(context).copyWith(textScaleFactor: 1.0),
+                  child: child!,
+                ),
+                home: widget.child,
+              );
+            },
+          ),
+        ),
+      ),
+    );
+  }
+}

test/data/light_sensor_service_test.dart

@@ -44,19 +44,19 @@ void main() {
       });
 
       test('true - Android', () async {
-        when(() => localPlatform.isAndroid).thenReturn(true);
+        when(() => localPlatform.isIOS).thenReturn(false);
         setMockSensorAvailability(hasSensor: true);
         expectLater(service.hasSensor(), completion(true));
       });
 
       test('false - Android', () async {
-        when(() => localPlatform.isAndroid).thenReturn(true);
+        when(() => localPlatform.isIOS).thenReturn(false);
         setMockSensorAvailability(hasSensor: false);
         expectLater(service.hasSensor(), completion(false));
       });
 
       test('false - iOS', () async {
-        when(() => localPlatform.isAndroid).thenReturn(false);
+        when(() => localPlatform.isIOS).thenReturn(true);
         expectLater(service.hasSensor(), completion(false));
       });
     },
@@ -64,7 +64,7 @@ void main() {
 
   group('luxStream', () {
     test('Android', () async {
-      when(() => localPlatform.isAndroid).thenReturn(true);
+      when(() => localPlatform.isIOS).thenReturn(false);
       final stream = service.luxStream();
       final List<int> result = [];
       final subscription = stream.listen(result.add);
@@ -77,7 +77,7 @@ void main() {
     });
 
     test('iOS', () async {
-      when(() => localPlatform.isAndroid).thenReturn(false);
+      when(() => localPlatform.isIOS).thenReturn(true);
       expect(service.luxStream(), const Stream<int>.empty());
     });
   });

test/flutter_test_config.dart

@@ -0,0 +1,47 @@
+import 'dart:async';
+import 'package:flutter/foundation.dart';
+import 'package:flutter/widgets.dart';
+import 'package:golden_toolkit/golden_toolkit.dart';
+
+Future<void> testExecutable(FutureOr<void> Function() testMain) async {
+  return GoldenToolkit.runWithConfiguration(
+    () async {
+      await loadAppFonts();
+      await testMain();
+    },
+    config: GoldenToolkitConfiguration(
+      defaultDevices: _defaultDevices +
+          _defaultDevices
+              .map(
+                (d) => Device(
+                  name: '${d.name} (Dark)',
+                  size: d.size,
+                  devicePixelRatio: d.devicePixelRatio,
+                  safeArea: d.safeArea,
+                  brightness: Brightness.dark,
+                ),
+              )
+              .toList(),
+    ),
+  );
+}
+
+const _defaultDevices = <Device>[
+  Device(
+    name: 'iPhone 8',
+    size: Size(375, 667),
+    devicePixelRatio: 2.0,
+  ),
+  Device(
+    name: 'iPhone 13 Pro',
+    size: Size(390, 844),
+    devicePixelRatio: 3.0,
+    safeArea: EdgeInsets.only(top: 44, bottom: 34),
+  ),
+  Device(
+    name: 'iPhone 15 Pro Max',
+    size: Size(430, 932),
+    devicePixelRatio: 3.0,
+    safeArea: EdgeInsets.only(top: 44, bottom: 34),
+  ),
+];

test/screens/metering/screen_metering_golden_test.dart

@@ -0,0 +1,144 @@
+import 'dart:convert';
+
+import 'package:flutter/widgets.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:golden_toolkit/golden_toolkit.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(),
+      ),
+    });
+  });
+
+  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(),
+    );
+  }
+}

test/screens/settings/settings_screen_golden_test.dart

@@ -0,0 +1,102 @@
+import 'dart:convert';
+
+import 'package:flutter/widgets.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:golden_toolkit/golden_toolkit.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/settings/flow_settings.dart';
+import 'package:m3_lightmeter_iap/m3_lightmeter_iap.dart';
+import 'package:package_info_plus/package_info_plus.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+import '../../application_mock.dart';
+
+class _SettingsScreenConfig {
+  final IAPProductStatus iapProductStatus;
+
+  _SettingsScreenConfig(this.iapProductStatus);
+
+  @override
+  String toString() {
+    final buffer = StringBuffer();
+    buffer.write(iapProductStatus.toString().split('.')[1]);
+    return buffer.toString();
+  }
+}
+
+final _testScenarios = [IAPProductStatus.purchased, IAPProductStatus.purchasable].map(
+  (iapProductStatus) => _SettingsScreenConfig(iapProductStatus),
+);
+
+void main() {
+  Future<void> setTheme(WidgetTester tester, Key scenarioWidgetKey, ThemeType themeType) async {
+    final flow = find.descendant(
+      of: find.byKey(scenarioWidgetKey),
+      matching: find.byType(SettingsFlow),
+    );
+    final BuildContext context = tester.element(flow);
+    UserPreferencesProvider.of(context).setThemeType(themeType);
+    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(),
+      ),
+    });
+    PackageInfo.setMockInitialValues(
+      appName: 'Lightmeter',
+      packageName: 'com.vodemn.lightmeter',
+      version: '0.18.0',
+      buildNumber: '48',
+      buildSignature: '',
+    );
+  });
+
+  testGoldens(
+    'SettingsScreen golden test',
+    (tester) async {
+      final builder = DeviceBuilder();
+      for (final scenario in _testScenarios) {
+        builder.addScenario(
+          name: scenario.toString(),
+          widget: _MockSettingsFlow(productStatus: scenario.iapProductStatus),
+          onCreate: (scenarioWidgetKey) async {
+            if (scenarioWidgetKey.toString().contains('Dark')) {
+              await setTheme(tester, scenarioWidgetKey, ThemeType.dark);
+            }
+          },
+        );
+      }
+      await tester.pumpDeviceBuilder(builder);
+      await screenMatchesGolden(
+        tester,
+        'settings_screen',
+      );
+    },
+  );
+}
+
+class _MockSettingsFlow extends StatelessWidget {
+  final IAPProductStatus productStatus;
+
+  const _MockSettingsFlow({required this.productStatus});
+
+  @override
+  Widget build(BuildContext context) {
+    return GoldenTestApplicationMock(
+      productStatus: productStatus,
+      child: const SettingsFlow(),
+    );
+  }
+}