m3_lightmeter/integration_test/generate_screenshots.dart

import 'dart:convert';
import 'dart:io';

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/models/theme_type.dart';
import 'package:lightmeter/data/models/volume_action.dart';
import 'package:lightmeter/data/shared_prefs_service.dart';
import 'package:lightmeter/generated/l10n.dart';
import 'package:lightmeter/res/dimens.dart';
import 'package:lightmeter/res/theme.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/iso_picker/widget_picker_iso.dart';
import 'package:lightmeter/screens/settings/components/metering/components/equipment_profiles/components/equipment_profile_screen/components/equipment_profile_container/widget_container_equipment_profile.dart';
import 'package:m3_lightmeter_resources/m3_lightmeter_resources.dart';
import 'package:shared_preferences/shared_preferences.dart';

import 'utils/platform_channel_mock.dart';
import 'utils/widget_tester_actions.dart';

//https://stackoverflow.com/a/67186625/13167574
void main() {
  final binding = IntegrationTestWidgetsFlutterBinding();
  IntegrationTestWidgetsFlutterBinding.ensureInitialized();
  final Color lightThemeColor = primaryColorsList[5];
  final Color darkThemeColor = primaryColorsList[3];

  void mockSharedPrefs(ThemeType theme, Color color) {
    SharedPreferences.setMockInitialValues({
      /// Metering values
      UserPreferencesService.evSourceTypeKey: EvSourceType.camera.index,
      UserPreferencesService.isoKey: 400,
      UserPreferencesService.ndFilterKey: 0,

      /// Metering settings
      UserPreferencesService.stopTypeKey: StopType.third.index,
      UserPreferencesService.cameraEvCalibrationKey: 0.0,
      UserPreferencesService.lightSensorEvCalibrationKey: 0.0,
      UserPreferencesService.meteringScreenLayoutKey: json.encode(
        {
          MeteringScreenLayoutFeature.equipmentProfiles: true,
          MeteringScreenLayoutFeature.extremeExposurePairs: true,
          MeteringScreenLayoutFeature.filmPicker: true,
          MeteringScreenLayoutFeature.histogram: false,
        }.toJson(),
      ),

      /// General settings
      UserPreferencesService.caffeineKey: true,
      UserPreferencesService.hapticsKey: true,
      UserPreferencesService.volumeActionKey: VolumeAction.shutter.toString(),
      UserPreferencesService.localeKey: 'en',

      /// Theme settings
      UserPreferencesService.themeTypeKey: theme.index,
      UserPreferencesService.primaryColorKey: color.value,
      UserPreferencesService.dynamicColorKey: false,
    });
  }

  /// Generates several screenshots with the light theme
  testWidgets(
    'Generate light theme screenshots',
    (tester) async {
      mockSharedPrefs(ThemeType.light, lightThemeColor);
      await tester.pumpApplication();

      await tester.takePhoto();
      await tester.takeScreenshot(binding, '${lightThemeColor.value}_metering_reflected');

      if (Platform.isAndroid) {
        await tester.tap(find.byTooltip(S.current.tooltipUseLightSensor));
        await tester.pumpAndSettle();
        await tester.tap(find.byType(MeteringMeasureButton));
        await sendMockIncidentEv(7.3);
        await tester.tap(find.byType(MeteringMeasureButton));
        await tester.takeScreenshot(binding, '${lightThemeColor.value}_metering_incident');
      }

      await tester.tap(find.byType(IsoValuePicker));
      await tester.pumpAndSettle(Dimens.durationL);
      await tester.takeScreenshot(binding, '${lightThemeColor.value}_metering_iso_picker');

      await tester.tapCancelButton();
      await tester.tap(find.byTooltip(S.current.tooltipOpenSettings));
      await tester.pumpAndSettle();
      await tester.takeScreenshot(binding, '${lightThemeColor.value}_settings');

      await tester.tapListTile(S.current.meteringScreenLayout);
      await tester.takeScreenshot(binding, '${lightThemeColor.value}_settings_metering_screen_layout');

      await tester.tapCancelButton();
      await tester.tapListTile(S.current.equipmentProfiles);
      await tester.tap(find.byType(EquipmentProfileContainer).first);
      await tester.pumpAndSettle();
      await tester.takeScreenshot(binding, '${lightThemeColor.value}-equipment_profiles');

      await tester.tap(find.byIcon(Icons.iso).first);
      await tester.pumpAndSettle();
      await tester.takeScreenshot(binding, '${lightThemeColor.value}_equipment_profiles_iso_picker');
    },
  );

  /// and the additionally the first one with the dark theme
  testWidgets(
    'Generate dark theme screenshots',
    (tester) async {
      mockSharedPrefs(ThemeType.dark, darkThemeColor);
      await tester.pumpApplication();

      await tester.takePhoto();
      await tester.takeScreenshot(binding, '${darkThemeColor.value}_metering_reflected');

      if (Platform.isAndroid) {
        await tester.tap(find.byTooltip(S.current.tooltipUseLightSensor));
        await tester.pumpAndSettle();
        await tester.tap(find.byType(MeteringMeasureButton));
        await sendMockIncidentEv(7.3);
        await tester.tap(find.byType(MeteringMeasureButton));
        await tester.takeScreenshot(binding, '${darkThemeColor.value}_metering_incident');
      }
    },
  );
}

extension on WidgetTester {
  Future<void> takeScreenshot(IntegrationTestWidgetsFlutterBinding binding, String name) async {
    if (Platform.isAndroid) {
      await binding.convertFlutterSurfaceToImage();
      await pumpAndSettle();
    }
    await binding.takeScreenshot(name);
    await pumpAndSettle();
  }

  Future<void> tapListTile(String title) async {
    final listTile = find.byWidgetPredicate(
      (widget) => widget is ListTile && widget.title is Text && (widget.title as Text?)?.data == title,
    );
    expect(listTile, findsOneWidget);
    await tap(listTile);
    await pumpAndSettle();
  }
}