baron-sso/userfront/test/locale_registry_test.dart

import 'package:flutter_test/flutter_test.dart';
import 'package:userfront/core/i18n/locale_registry.dart';

void main() {
  tearDown(() {
    LocaleRegistry.resetForTest();
  });

  group('locale_registry', () {
    test(
      'extractSupportedLocaleCodesFromAssets excludes template and invalid',
      () {
        final locales = extractSupportedLocaleCodesFromAssets([
          'assets/translations/template.toml',
          'assets/translations/en.toml',
          'assets/translations/ko.toml',
          'assets/translations/pt_BR.toml',
          'assets/translations/readme.txt',
          'assets/translations/nested/ja.toml',
        ]);

        expect(locales, ['en', 'ko']);
      },
    );

    test('fallback locale prefers en when available', () {
      LocaleRegistry.setSupportedLocaleCodesForTest(['ko', 'en']);
      expect(LocaleRegistry.fallbackLocaleCode, 'en');
    });

    test('fallback locale uses first sorted code when en is absent', () {
      LocaleRegistry.setSupportedLocaleCodesForTest(['ko', 'ja']);
      expect(LocaleRegistry.fallbackLocaleCode, 'ja');
    });
  });
}