| // 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/material.dart'; |
| import 'package:flutter_test/flutter_test.dart'; |
| |
| const String text = 'Hello World! How are you? Life is good!'; |
| const String alternativeText = 'Everything is awesome!!'; |
| |
| void main() { |
| testWidgets('TextField restoration', (WidgetTester tester) async { |
| await tester.pumpWidget( |
| const MaterialApp( |
| restorationScopeId: 'app', |
| home: TestWidget(), |
| ), |
| ); |
| |
| await restoreAndVerify(tester); |
| }); |
| |
| testWidgets('TextField restoration with external controller', (WidgetTester tester) async { |
| await tester.pumpWidget( |
| const MaterialApp( |
| restorationScopeId: 'root', |
| home: TestWidget( |
| useExternal: true, |
| ), |
| ), |
| ); |
| |
| await restoreAndVerify(tester); |
| }); |
| } |
| |
| Future<void> restoreAndVerify(WidgetTester tester) async { |
| expect(find.text(text), findsNothing); |
| expect(tester.state<ScrollableState>(find.byType(Scrollable)).position.pixels, 0); |
| |
| await tester.enterText(find.byType(TextField), text); |
| await skipPastScrollingAnimation(tester); |
| expect(tester.state<ScrollableState>(find.byType(Scrollable)).position.pixels, 0); |
| |
| await tester.drag(find.byType(Scrollable), const Offset(0, -80)); |
| await skipPastScrollingAnimation(tester); |
| |
| expect(find.text(text), findsOneWidget); |
| expect(tester.state<ScrollableState>(find.byType(Scrollable)).position.pixels, 60); |
| |
| await tester.restartAndRestore(); |
| |
| expect(find.text(text), findsOneWidget); |
| expect(tester.state<ScrollableState>(find.byType(Scrollable)).position.pixels, 60); |
| |
| final TestRestorationData data = await tester.getRestorationData(); |
| |
| await tester.enterText(find.byType(TextField), alternativeText); |
| await skipPastScrollingAnimation(tester); |
| await tester.drag(find.byType(Scrollable), const Offset(0, 80)); |
| await skipPastScrollingAnimation(tester); |
| |
| expect(find.text(text), findsNothing); |
| expect(tester.state<ScrollableState>(find.byType(Scrollable)).position.pixels, isNot(60)); |
| |
| await tester.restoreFrom(data); |
| |
| expect(find.text(text), findsOneWidget); |
| expect(tester.state<ScrollableState>(find.byType(Scrollable)).position.pixels, 60); |
| } |
| |
| class TestWidget extends StatefulWidget { |
| const TestWidget({super.key, this.useExternal = false}); |
| |
| final bool useExternal; |
| |
| @override |
| TestWidgetState createState() => TestWidgetState(); |
| } |
| |
| class TestWidgetState extends State<TestWidget> with RestorationMixin { |
| final RestorableTextEditingController controller = RestorableTextEditingController(); |
| |
| @override |
| String get restorationId => 'widget'; |
| |
| @override |
| void restoreState(RestorationBucket? oldBucket, bool initialRestore) { |
| registerForRestoration(controller, 'controller'); |
| } |
| |
| @override |
| void dispose() { |
| controller.dispose(); |
| super.dispose(); |
| } |
| |
| @override |
| Widget build(BuildContext context) { |
| return Material( |
| child: Align( |
| child: SizedBox( |
| width: 50, |
| child: TextField( |
| restorationId: 'text', |
| maxLines: 3, |
| controller: widget.useExternal ? controller.value : null, |
| ), |
| ), |
| ), |
| ); |
| } |
| } |
| |
| Future<void> skipPastScrollingAnimation(WidgetTester tester) async { |
| await tester.pump(); |
| await tester.pump(const Duration(milliseconds: 200)); |
| } |