62 lines
1.5 KiB
Dart
62 lines
1.5 KiB
Dart
// Copyright 2014 The Flutter 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';
|
|
|
|
ChangerState changer;
|
|
|
|
class Changer extends StatefulWidget {
|
|
const Changer(this.child, { Key key }) : super(key: key);
|
|
|
|
final Widget child;
|
|
|
|
@override
|
|
ChangerState createState() => ChangerState();
|
|
}
|
|
|
|
class ChangerState extends State<Changer> {
|
|
bool _state = false;
|
|
|
|
@override
|
|
void initState() {
|
|
super.initState();
|
|
changer = this;
|
|
}
|
|
|
|
void test() { setState(() { _state = true; }); }
|
|
|
|
@override
|
|
Widget build(BuildContext context) => _state ? Wrapper(widget.child) : widget.child;
|
|
}
|
|
|
|
class Wrapper extends StatelessWidget {
|
|
const Wrapper(this.child, { Key key }) : super(key: key);
|
|
|
|
final Widget child;
|
|
|
|
@override
|
|
Widget build(BuildContext context) => child;
|
|
}
|
|
|
|
class Leaf extends StatefulWidget {
|
|
const Leaf({ Key key }) : super(key: key);
|
|
@override
|
|
LeafState createState() => LeafState();
|
|
}
|
|
|
|
class LeafState extends State<Leaf> {
|
|
@override
|
|
Widget build(BuildContext context) => const Text('leaf', textDirection: TextDirection.ltr);
|
|
}
|
|
|
|
void main() {
|
|
testWidgets('three-way setState() smoke test', (WidgetTester tester) async {
|
|
await tester.pumpWidget(const Changer(Wrapper(Leaf())));
|
|
await tester.pumpWidget(const Changer(Wrapper(Leaf())));
|
|
changer.test();
|
|
await tester.pump();
|
|
});
|
|
}
|