Melo/test/player/provider_scope_navigator_push_test.dart

import 'package:audio_service/audio_service.dart';
import 'package:drift/drift.dart' show Value, driftRuntimeOptions;
import 'package:drift/native.dart';
import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:melo/library/category_service.dart';
import 'package:melo/library/database.dart';
import 'package:melo/library/library_service.dart';
import 'package:melo/library/playlist_service.dart';
import 'package:melo/main.dart';
import 'package:melo/player/audio_handler.dart';
import 'package:melo/player/mini_player.dart';
import 'package:melo/player/player_expansion_controller.dart';
import 'package:melo/playlists/playlist_detail_screen.dart';
import 'package:melo/services/baka_auth.dart';
import 'package:melo/services/download_service.dart';
import 'package:melo/services/melo_cloud_service.dart';
import 'package:melo/services/navidrome_service.dart';
import 'package:melo/services/offline_mode.dart';
import 'package:melo/services/sync_service.dart';
import 'package:melo/services/yt_download_service.dart';
import 'package:melo/services/yt_search_service.dart';
import 'package:melo/settings/app_settings.dart';
import 'package:provider/provider.dart';
import 'package:shared_preferences/shared_preferences.dart';

class _MemorySpeicher implements TokenSpeicher {
  final Map<String, String> werte = {};
  @override
  Future<String?> lesen(String key) async => werte[key];
  @override
  Future<void> schreiben(String key, String wert) async => werte[key] = wert;
  @override
  Future<void> loeschen(String key) async => werte.remove(key);
}

/// Ersetzt in [MeloAudioHandler.loadPlaylist] den echten just_audio-Zugriff —
/// dieselbe Klasse wie in playlist_detail_navigation_test.dart.
class _FakeAudioHandler extends MeloAudioHandler {
  _FakeAudioHandler(MeloDb db) : super(db: db);

  @override
  Future<int> loadPlaylist(List<MediaItem> items, {int startIndex = 0}) async {
    queue.add(items);
    if (items.isNotEmpty) mediaItem.add(items[startIndex]);
    return 0;
  }
}

void main() {
  setUp(() => SharedPreferences.setMockInitialValues({}));

  testWidgets(
      'Per Navigator.push geöffneter PlaylistDetailScreen (wie aus '
      'playlists_screen.dart:120) sieht PlayerExpansionController — echtes '
      'HomeShell, echter Navigator.push, kein direkt daneben geklebter '
      'Test-Provider (Review-Fund: Provider war bisher nur INNERHALB von '
      'HomeShell.build() bereitgestellt, eine gepushte Route ist im Baum '
      'aber ein Geschwister von HomeShell, kein Nachfahre)', (tester) async {
    driftRuntimeOptions.dontWarnAboutMultipleDatabases = true;
    final db = MeloDb(NativeDatabase.memory());
    await db.into(db.songs).insert(SongsCompanion.insert(
          id: 'song-1',
          path: '/music/roses.mp3',
          title: 'Roses',
          artist: const Value('Neoni'),
          dateAddedMs: 0,
          updatedAtMs: 0,
        ));
    final playlistId = await db.createPlaylist('Road Trip');
    await db.addSongToPlaylist(playlistId, 'song-1', 0);
    final playlist = Playlist(
      id: playlistId,
      name: 'Road Trip',
      createdAtMs: 0,
      updatedAtMs: 0,
      deleted: false,
    );

    final lib = LibraryService(db);
    final playlists = PlaylistService(db);
    final handler = _FakeAudioHandler(db);
    final auth = BakaAuth(speicher: _MemorySpeicher());
    final expansion = PlayerExpansionController(vsync: tester);
    addTearDown(expansion.dispose);

    // Dieselbe Provider-Verdrahtung wie home_shell_real_expansion_test.dart,
    // PlayerExpansionController aber jetzt OBERHALB von MaterialApp/HomeShell
    // — genau wie MeloApps MultiProvider nach dem Fix (main.dart), nicht mehr
    // nur INNERHALB von HomeShell.build() bereitgestellt.
    await tester.pumpWidget(MultiProvider(
      providers: [
        Provider<MeloDb>.value(value: db),
        ChangeNotifierProvider<LibraryService>.value(value: lib),
        ChangeNotifierProvider<PlaylistService>.value(value: playlists),
        Provider<MeloAudioHandler>.value(value: handler),
        ChangeNotifierProvider<CategoryService>(create: (_) => CategoryService(db)),
        ChangeNotifierProvider<AppSettings>(create: (_) => AppSettings()),
        ChangeNotifierProvider<OfflineMode>(create: (_) => OfflineMode()),
        ChangeNotifierProvider<BakaAuth>(create: (_) => auth),
        ChangeNotifierProvider<YtDownloadService>(
            create: (_) => YtDownloadService(auth: auth)),
        ChangeNotifierProvider<YtSearchService>(
            create: (_) => YtSearchService(auth: auth)),
        ChangeNotifierProvider<DownloadService>(
            create: (_) => DownloadService(db: db, navidrome: NavidromeService())),
        ChangeNotifierProvider<SyncService>(
            create: (_) =>
                SyncService(db: db, cloud: MeloCloudService(auth: auth))),
        ChangeNotifierProvider<PlayerExpansionController>.value(
            value: expansion),
      ],
      child: const MaterialApp(home: HomeShell()),
    ));
    await tester.pump();

    // Navigator.push GENAU wie playlists_screen.dart:120 — von einem Kontext
    // INNERHALB des echten HomeShell-Baums aus (MiniPlayer steckt immer im
    // Stack, auch ohne laufenden Titel), nicht von einem manuell daneben
    // gebauten Test-Baum.
    final homeShellContext = tester.element(find.byType(MiniPlayer));
    Navigator.of(homeShellContext).push(MaterialPageRoute(
      builder: (_) => PlaylistDetailScreen(playlist: playlist),
    ));
    await tester.pumpAndSettle();

    expect(find.text('Roses'), findsOneWidget);

    // Tap wie ein echter Nutzer — löst intern playSongs() und danach
    // context.read<PlayerExpansionController>().open(context) aus.
    await tester.tap(find.text('Roses'));
    await tester.pumpAndSettle();

    // Bug-Symptom: die ProviderNotFoundException landet im try/catch von
    // PlaylistDetailScreen und zeigt eine "Wiedergabe fehlgeschlagen"-
    // Snackbar, statt dass der Player öffnet.
    expect(find.textContaining('Wiedergabe fehlgeschlagen'), findsNothing,
        reason: 'context.read<PlayerExpansionController>() darf hier keine '
            'ProviderNotFoundException werfen.');
    // Beweis, dass .open() tatsächlich denselben (einzigen) Controller
    // erreicht hat, nicht nur, dass keine Exception flog.
    expect(expansion.progress, 1.0);

    // Aufräum-Reihenfolge wie home_shell_real_expansion_test.dart: erst den
    // Baum abbauen, dann den Handler disposen (offener Positions-Timer).
    await tester.pumpWidget(const SizedBox());
    handler.dispose();
    await tester.pump(const Duration(milliseconds: 1));
  });
}