| // 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_api_samples/widgets/page_view/page_view.1.dart' |
| as example; |
| import 'package:flutter_test/flutter_test.dart'; |
| |
| void main() { |
| testWidgets( |
| 'tapping Reverse button should reverse PageView', |
| (WidgetTester tester) async { |
| await tester.pumpWidget(const example.PageViewExampleApp()); |
| final Finder pageView = find.byType(PageView); |
| final Finder reverseFinder = find.text('Reverse items'); |
| final Finder firstItemFinder = find.byKey(const ValueKey<String>('1')); |
| final Finder lastItemFinder = find.byKey(const ValueKey<String>('5')); |
| expect(pageView, findsOneWidget); |
| expect(reverseFinder, findsOneWidget); |
| expect(firstItemFinder, findsOneWidget); |
| expect(lastItemFinder, findsNothing); |
| await tester.tap(reverseFinder); |
| await tester.pump(); |
| expect(firstItemFinder, findsNothing); |
| expect(lastItemFinder, findsOneWidget); |
| }, |
| ); |
| } |