| // 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/material/navigation_bar/navigation_bar.0.dart' |
| as example; |
| import 'package:flutter_test/flutter_test.dart'; |
| |
| void main() { |
| testWidgets('Navigation bar updates destination on tap', |
| (WidgetTester tester) async { |
| await tester.pumpWidget( |
| const example.ExampleApp(), |
| ); |
| final NavigationBar navigationBarWidget = |
| tester.firstWidget(find.byType(NavigationBar)); |
| |
| /// NavigationDestinations must be rendered |
| expect(find.text('Explore'), findsOneWidget); |
| expect(find.text('Commute'), findsOneWidget); |
| expect(find.text('Saved'), findsOneWidget); |
| |
| /// initial index must be zero |
| expect(navigationBarWidget.selectedIndex, 0); |
| |
| /// switch to second tab |
| await tester.tap(find.text('Commute')); |
| await tester.pumpAndSettle(); |
| expect(find.text('Page 2'), findsOneWidget); |
| |
| /// switch to third tab |
| await tester.tap(find.text('Saved')); |
| await tester.pumpAndSettle(); |
| expect(find.text('Page 3'), findsOneWidget); |
| }); |
| } |