| // Copyright 2016 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 Wrapper extends StatelessWidget { |
| const Wrapper({ |
| Key key, |
| this.child, |
| }) : super(key: key); |
| |
| final Widget child; |
| |
| @override |
| Widget build(BuildContext context) => child; |
| } |
| |
| class StatefulWrapper extends StatefulWidget { |
| const StatefulWrapper({ |
| Key key, |
| this.child, |
| }) : super(key: key); |
| |
| final Widget child; |
| |
| @override |
| StatefulWrapperState createState() => StatefulWrapperState(); |
| } |
| |
| class StatefulWrapperState extends State<StatefulWrapper> { |
| |
| void trigger() { |
| setState(() { /* for test purposes */ }); |
| } |
| |
| @override |
| Widget build(BuildContext context) => widget.child; |
| } |
| |
| void main() { |
| testWidgets('Moving global key inside a LayoutBuilder', (WidgetTester tester) async { |
| final GlobalKey<StatefulWrapperState> key = GlobalKey<StatefulWrapperState>(); |
| await tester.pumpWidget( |
| LayoutBuilder(builder: (BuildContext context, BoxConstraints constraints) { |
| return Wrapper( |
| child: StatefulWrapper(key: key, child: Container(height: 100.0)), |
| ); |
| }), |
| ); |
| await tester.pumpWidget( |
| LayoutBuilder(builder: (BuildContext context, BoxConstraints constraints) { |
| key.currentState.trigger(); |
| return StatefulWrapper(key: key, child: Container(height: 100.0)); |
| }), |
| ); |
| }); |
| } |