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

void main() {
  test("a place shows the most specific flag there is: a subdivision's own, "
      "else its country's, and the European Union's", () {
    expect(flagCodeOf('EU'), 'eu');
    expect(flagCodeOf('DE'), 'de');
    expect(flagCodeOf('CH'), 'ch');
    expect(flagCodeOf('DE-BY'), 'de');
    expect(flagCodeOf('US-CA'), 'us');
    expect(flagCodeOf('GB-SCT'), 'gb_sct');
    expect(flagCodeOf('ES-CT'), 'es_ct');
    expect(flagCodeOf('DE-ZZ'), 'de');
  });

  test('a place without a flag shows none', () {
    expect(flagCodeOf('QQ'), isNull);
    expect(flagCodeOf('QQ-AB'), isNull);
  });

  testWidgets("a state shows its country's flag, a place without one "
      'nothing', (tester) async {
    await tester.pumpWidget(
      const Directionality(
        textDirection: TextDirection.ltr,
        child: Row(
          children: [InstanceFlag('US-CA'), InstanceFlag('QQ-AB')],
        ),
      ),
    );

    expect(find.byType(Flag), findsOne);
  });
}