| // Copyright 2015 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| import 'package:flutter_test/flutter_test.dart'; |
| import 'package:flutter/widgets.dart'; |
| |
| class Changer extends StatefulWidget { |
| @override |
| ChangerState createState() => new ChangerState(); |
| } |
| |
| class ChangerState extends State<Changer> { |
| void test0() { setState(() { }); } |
| void test1() { setState(() => 1); } |
| void test2() { setState(() async { }); } |
| |
| @override |
| Widget build(BuildContext context) => const Text('test', textDirection: TextDirection.ltr); |
| } |
| |
| void main() { |
| testWidgets('setState() catches being used with an async callback', (WidgetTester tester) async { |
| await tester.pumpWidget(new Changer()); |
| final ChangerState s = tester.state(find.byType(Changer)); |
| expect(s.test0, isNot(throwsFlutterError)); |
| expect(s.test1, isNot(throwsFlutterError)); |
| expect(s.test2, throwsFlutterError); |
| }); |
| } |