halkyon/packages/halkyon_app/test/instance/country_names_test.dart

import 'package:flutter_test/flutter_test.dart';
import 'package:halkyon_app/halkyon_app.dart';

void main() {
  test('a country is named in the language asked for, else in English, and '
      'one without a name not at all', () async {
    final names = MemoryCountryNames({
      'CH': {'de': 'Schweiz', 'en': 'Switzerland'},
    });

    expect(await names.nameOf('CH', 'de'), 'Schweiz');
    expect(await names.nameOf('ch', 'de'), 'Schweiz');
    expect(await names.nameOf('CH', 'ja'), 'Switzerland');
    expect(await names.nameOf('XX', 'en'), isNull);
  });

  testWidgets("Unicode CLDR's names come with the package, in English and "
      'German', (tester) async {
    final names = await tester.runAsync(
      () async => (
        germany: await const AssetCountryNames().nameOf('DE', 'en'),
        deutschland: await const AssetCountryNames().nameOf('de', 'de'),
        states: await const AssetCountryNames().nameOf('US', 'de'),
        kingdom: await const AssetCountryNames().nameOf('GB', 'de'),
        switzerland: await const AssetCountryNames().nameOf('CH', 'ja'),
        kosovo: await const AssetCountryNames().nameOf('XK', 'en'),
        // The union is the package's own words (instanceEuropeanUnion),
        // and a region of the world no country.
        union: await const AssetCountryNames().nameOf('EU', 'en'),
        unknown: await const AssetCountryNames().nameOf('ZZ', 'en'),
      ),
    );

    expect(names?.germany, 'Germany');
    expect(names?.deutschland, 'Deutschland');
    expect(names?.states, 'Vereinigte Staaten');
    expect(names?.kingdom, 'Vereinigtes Königreich');
    expect(names?.switzerland, 'Switzerland', reason: 'English otherwise');
    expect(names?.kosovo, 'Kosovo');
    expect(names?.union, isNull);
    expect(names?.unknown, isNull);
  });
}