reelbox/tool/banner_ui_capture_test.dart

// Explicit host-rendered UI evidence; not Android-device verification.
import 'dart:io';
import 'dart:ui' as ui;

import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
import 'package:flutter/services.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:reelbox/app.dart';
import 'package:reelbox/state/app_state.dart';
import 'package:reelbox/ui/catalog.dart';
import 'package:shared_preferences/shared_preferences.dart';

import '../test/home_banner_widget_test.dart' show HomeBannerFixtureApi;

void main() {
  testWidgets(
    'actual home Telegram at 390x844 in English/Persian including API error and tap',
    (tester) async {
      await tester.runAsync(() async {
        final bytes = await File(
          Platform.environment['REELBOX_TEST_FONT'] ??
              '/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf',
        ).readAsBytes();
        for (final family in ['Roboto', 'Ahem']) {
          await (FontLoader(
            family,
          )..addFont(Future.value(bytes.buffer.asByteData()))).load();
        }
        final icons = await File(
          Platform.environment['REELBOX_ICON_FONT'] ?? '/root/developer-tools/flutter/bin/cache/artifacts/material_fonts/MaterialIcons-Regular.otf',
        ).readAsBytes();
        await (FontLoader(
          'MaterialIcons',
        )..addFont(Future.value(icons.buffer.asByteData()))).load();
      });
      tester.view.devicePixelRatio = 1;
      tester.view.physicalSize = const Size(390, 844);
      addTearDown(tester.view.resetDevicePixelRatio);
      addTearDown(tester.view.resetPhysicalSize);
      final output = Directory(
        Platform.environment['REELBOX_SCREENSHOT_DIR'] ??
            '${Directory.current.path}/build/banner-ui-verification',
      );
      await tester.runAsync(() => output.create(recursive: true));
      const channel = MethodChannel('plugins.flutter.io/url_launcher');
      final targets = <String>[];
      tester.binding.defaultBinaryMessenger.setMockMethodCallHandler(channel, (
        call,
      ) async {
        targets.add(call.arguments['url'] as String);
        return true;
      });
      addTearDown(
        () => tester.binding.defaultBinaryMessenger.setMockMethodCallHandler(
          channel,
          null,
        ),
      );
      for (final failed in [false, true]) {
        for (final locale in ['en', 'fa']) {
          // ignore: invalid_use_of_visible_for_testing_member
          SharedPreferences.setMockInitialValues({});
          final state = AppState(
            api: HomeBannerFixtureApi()..fail = failed,
            storage: await SharedPreferences.getInstance(),
          );
          await state.initialize(discover: false);
          await state.updateSettings(
            state.prefs.copyWith(locale: locale, introCompleted: true),
          );
          final boundaryKey = GlobalKey();
          await tester.pumpWidget(
            RepaintBoundary(
              key: boundaryKey,
              child: MyApp(state: state),
            ),
          );
          await tester.pumpAndSettle();
          expect(find.byType(DiscoverPage), findsOneWidget);
          expect(find.byType(NavigationBar), findsOneWidget);
          final title = locale == 'en'
              ? 'ReelBox updates'
              : 'تازه‌های ریل‌باکس';
          expect(find.text(title), findsOneWidget);
          expect(
            tester
                .getRect(find.byKey(const Key('home-banner-telegram')))
                .bottom,
            lessThan(844),
          );
          if (failed) expect(find.text('Offline'), findsWidgets);
          expect(tester.takeException(), isNull);
          final boundary =
              boundaryKey.currentContext!.findRenderObject()!
                  as RenderRepaintBoundary;
          final name = 'home-banner-$locale${failed ? '-error' : ''}';
          await tester.runAsync(() async {
            final image = await boundary.toImage(pixelRatio: 1);
            expect(image.width, 390);
            expect(image.height, 844);
            final bytes = await image.toByteData(
              format: ui.ImageByteFormat.png,
            );
            await File('${output.path}/$name.png')
                .writeAsBytes(bytes!.buffer.asUint8List());
            image.dispose();
          });
          await tester.tap(find.byKey(const Key('home-banner-telegram')));
          await tester.pumpAndSettle();
          expect(targets.last, 'https://t.me/ReelBoxApp');
          await tester.pumpWidget(const SizedBox());
          state.dispose();
        }
      }
      expect(targets, List.filled(4, 'https://t.me/ReelBoxApp'));
    },
  );
}