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