buzz/mobile/test/shared/l10n/locale_provider_test.dart

import 'package:buzz/shared/l10n/l10n.dart';
import 'package:buzz/shared/theme/theme_provider.dart';
import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:hooks_riverpod/hooks_riverpod.dart';
import 'package:shared_preferences/shared_preferences.dart';

void main() {
  test('follows the system by default and persists explicit choices', () async {
    SharedPreferences.setMockInitialValues({});
    final prefs = await SharedPreferences.getInstance();
    final container = ProviderContainer(
      overrides: [savedPrefsProvider.overrideWithValue(prefs)],
    );
    addTearDown(container.dispose);

    expect(container.read(appLocaleProvider), isNull);

    container
        .read(appLocaleProvider.notifier)
        .setLocale(const Locale('zh', 'CN'));
    expect(container.read(appLocaleProvider), const Locale('zh', 'CN'));
    expect(prefs.getString('buzz_locale'), 'zh_CN');

    container.read(appLocaleProvider.notifier).setLocale(null);
    expect(container.read(appLocaleProvider), isNull);
    expect(prefs.getString('buzz_locale'), 'system');
  });

  test('restores a saved English choice', () async {
    SharedPreferences.setMockInitialValues({'buzz_locale': 'en'});
    final prefs = await SharedPreferences.getInstance();
    final container = ProviderContainer(
      overrides: [savedPrefsProvider.overrideWithValue(prefs)],
    );
    addTearDown(container.dispose);

    expect(container.read(appLocaleProvider), const Locale('en'));
  });

  test('loads Simplified Chinese labels for core mobile surfaces', () async {
    final l10n = await AppLocalizations.delegate.load(
      const Locale('zh', 'CN'),
    );

    expect(l10n.activityTitle, '动态');
    expect(l10n.searchPrompt, '搜索消息、频道和人员');
    expect(l10n.manageChannel, '管理频道');
    expect(l10n.replyInThreadHint, '在话题中回复…');
  });
}