set_state_3_test.dart 1.32 KB
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// 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.

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import 'package:flutter_test/flutter_test.dart';
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import 'package:flutter/widgets.dart';
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import 'package:test/test.dart';

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ChangerState changer;

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class Changer extends StatefulComponent {
  Changer(this.child);
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  final Widget child;

  ChangerState createState() => new ChangerState();
}

class ChangerState extends State<Changer> {
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  bool _state = false;
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  void initState() {
    super.initState();
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    changer = this;
  }

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  void test() { setState(() { _state = true; }); }
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  Widget build(BuildContext context) => _state ? new Wrapper(config.child) : config.child;
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}

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class Wrapper extends StatelessComponent {
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  Wrapper(this.child);
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  final Widget child;
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  Widget build(BuildContext context) => child;
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}

class Leaf extends StatefulComponent {
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  LeafState createState() => new LeafState();
}

class LeafState extends State<Leaf> {
  Widget build(BuildContext context) => new Text("leaf");
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}

void main() {
  test('three-way setState() smoke test', () {
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    testWidgets((WidgetTester tester) {
      tester.pumpWidget(new Changer(new Wrapper(new Leaf())));
      tester.pumpWidget(new Changer(new Wrapper(new Leaf())));
      changer.test();
      tester.pump();
    });
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  });
}