import 'package:fluent_ui/fluent_ui.dart'; import 'package:flutter_test/flutter_test.dart'; import 'app_test.dart'; void main() { final expanderKey = GlobalKey(); testWidgets('Expander intiallyExpanded works properly', (tester) async { await tester.pumpWidget( wrapApp( child: Expander( key: expanderKey, initiallyExpanded: true, header: const Text('Header'), content: const Text('Content'), ), ), ); expect(expanderKey.currentState!.open, true); }); }