BadNote/test/l10n_test.dart

// Proves i18n is real, not just wired: the SAME widget resolves English under
// Locale('en') and Chinese under Locale('zh'), through the generated
// AppLocalizations delegates. Guards against ARB keys drifting out of sync.

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';

import 'package:badnote/l10n/app_localizations.dart';

class _Probe extends StatelessWidget {
  const _Probe();
  @override
  Widget build(BuildContext context) {
    final l = AppLocalizations.of(context);
    return Directionality(
      textDirection: TextDirection.ltr,
      child: Column(children: [
        Text(l.settings),
        Text(l.toolEraser),
        Text(l.importPdf),
        Text(l.themeSystem),
        Text(l.searchHint),
      ]),
    );
  }
}

Future<void> _pump(WidgetTester tester, Locale locale) {
  return tester.pumpWidget(MaterialApp(
    locale: locale,
    localizationsDelegates: AppLocalizations.localizationsDelegates,
    supportedLocales: AppLocalizations.supportedLocales,
    home: const _Probe(),
  ));
}

void main() {
  testWidgets('English locale resolves English strings', (tester) async {
    await _pump(tester, const Locale('en'));
    expect(find.text('Settings'), findsOneWidget);
    expect(find.text('Eraser'), findsOneWidget);
    expect(find.text('Import PDF'), findsOneWidget);
    expect(find.text('System'), findsOneWidget);
    expect(find.text('Search notes and documents...'), findsOneWidget);
  });

  testWidgets('Chinese locale resolves Chinese strings', (tester) async {
    await _pump(tester, const Locale('zh'));
    expect(find.text('设置'), findsOneWidget);
    expect(find.text('橡皮擦'), findsOneWidget);
    expect(find.text('导入 PDF'), findsOneWidget);
    expect(find.text('跟随系统'), findsOneWidget);
    expect(find.text('搜索笔记和文档…'), findsOneWidget);
  });

  test('both locales are supported', () {
    final langs =
        AppLocalizations.supportedLocales.map((l) => l.languageCode).toSet();
    expect(langs.containsAll({'en', 'zh'}), isTrue);
  });
}