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import 'dart:convert';
import 'dart:io';
import 'dart:typed_data';
import 'package:flutter/material.dart';
import 'package:flutter_svg/flutter_svg.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:firefox_vpn/core/core_api.dart';
import 'package:firefox_vpn/core/remote_flags.dart';
import 'package:firefox_vpn/ui/widgets.dart';
/// A core that has the flag of Iran only.
class _FlagCore implements CoreApi {
final asked = <String>[];
@override
Future<Uint8List?> flag(String code) async {
asked.add(code);
return code == 'ir'
? Uint8List.fromList(
utf8.encode(
'<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 4 3">'
'<rect width="4" height="3" fill="#239f40"/></svg>',
),
)
: null;
}
@override
dynamic noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
}
void main() {
test('the app carries exactly the flags it lists', () {
final files = {
for (final f in Directory('assets/flags').listSync())
if (f.path.endsWith('.svg'))
f.uri.pathSegments.last.replaceAll('.svg', ''),
};
expect(files, bundledFlags);
});
testWidgets('a flag the app lacks comes from the core, once', (tester) async {
final core = _FlagCore();
RemoteFlags.use(core);
Widget flags() => const MaterialApp(
home: Row(
children: [
CountryFlag(code: 'NL'),
CountryFlag(code: 'IR'),
CountryFlag(code: 'ZZ'),
],
),
);
await tester.pumpWidget(flags());
await tester.pumpAndSettle();
// Carried: not asked; Iran from the core; none for ZZ: its code.
expect(core.asked, ['ir', 'zz']);
expect(find.byType(SvgPicture), findsNWidgets(2));
expect(find.text('ZZ'), findsOneWidget);
await tester.pumpWidget(flags());
await tester.pumpAndSettle();
expect(core.asked, ['ir', 'zz'], reason: 'asked once per run');
});
}
arblant