| // 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 Item { |
| GlobalKey key1 = new GlobalKey(); |
| GlobalKey key2 = new GlobalKey(); |
| |
| @override |
| String toString() => 'Item($key1, $key2)'; |
| } |
| List<Item> items = <Item>[new Item(), new Item()]; |
| |
| class StatefulLeaf extends StatefulWidget { |
| const StatefulLeaf({ GlobalKey key }) : super(key: key); |
| |
| @override |
| StatefulLeafState createState() => new StatefulLeafState(); |
| } |
| |
| class StatefulLeafState extends State<StatefulLeaf> { |
| void markNeedsBuild() { setState(() { }); } |
| |
| @override |
| Widget build(BuildContext context) => const Text('leaf', textDirection: TextDirection.ltr); |
| } |
| |
| class KeyedWrapper extends StatelessWidget { |
| const KeyedWrapper(this.key1, this.key2); |
| |
| final Key key1; |
| final Key key2; |
| |
| @override |
| Widget build(BuildContext context) { |
| return new Container( |
| key: key1, |
| child: new StatefulLeaf( |
| key: key2, |
| ) |
| ); |
| } |
| } |
| |
| Widget builder() { |
| return new Column( |
| children: <Widget>[ |
| new KeyedWrapper(items[1].key1, items[1].key2), |
| new KeyedWrapper(items[0].key1, items[0].key2), |
| ], |
| ); |
| } |
| |
| void main() { |
| testWidgets('moving subtrees with global keys - smoketest', (WidgetTester tester) async { |
| await tester.pumpWidget(builder()); |
| final StatefulLeafState leaf = tester.firstState(find.byType(StatefulLeaf)); |
| leaf.markNeedsBuild(); |
| await tester.pump(); |
| final Item lastItem = items[1]; |
| items.remove(lastItem); |
| items.insert(0, lastItem); |
| await tester.pumpWidget(builder()); // this marks the app dirty and rebuilds it |
| }); |
| } |