| // Copyright 2018 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 BadWidget extends StatefulWidget { |
| @override |
| State<StatefulWidget> createState() => new BadWidgetState(); |
| |
| } |
| |
| class BadWidgetState extends State<BadWidget> { |
| BadWidgetState() { |
| setState(() { |
| _count = 1; |
| }); |
| } |
| |
| int _count = 0; |
| |
| @override |
| Widget build(BuildContext context) { |
| return new Text(_count.toString()); |
| } |
| } |
| |
| void main() { |
| testWidgets('setState() catches being used inside a constructor', (WidgetTester tester) async { |
| await tester.pumpWidget(new BadWidget()); |
| expect(tester.takeException(), const isInstanceOf<FlutterError>()); |
| }); |
| } |