| // 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.NavigationBarApp(), |
| ); |
| final NavigationBar navigationBarWidget = tester.firstWidget(find.byType(NavigationBar)); |
| |
| /// NavigationDestinations must be rendered |
| expect(find.text('Home'), findsOneWidget); |
| expect(find.text('Notifications'), findsOneWidget); |
| expect(find.text('Messages'), findsOneWidget); |
| |
| /// Test notification badge. |
| final Badge notificationBadge = tester.firstWidget(find.ancestor( |
| of: find.byIcon(Icons.notifications_sharp), |
| matching: find.byType(Badge), |
| )); |
| expect(notificationBadge.label, null); |
| |
| /// Test messages badge. |
| final Badge messagesBadge = tester.firstWidget(find.ancestor( |
| of: find.byIcon(Icons.messenger_sharp), |
| matching: find.byType(Badge), |
| )); |
| expect(messagesBadge.label, isNotNull); |
| |
| /// Initial index must be zero |
| expect(navigationBarWidget.selectedIndex, 0); |
| expect(find.text('Home page'), findsOneWidget); |
| |
| /// Switch to second tab |
| await tester.tap(find.text('Notifications')); |
| await tester.pumpAndSettle(); |
| expect(find.text('This is a notification'), findsNWidgets(2)); |
| |
| /// Switch to third tab |
| await tester.tap(find.text('Messages')); |
| await tester.pumpAndSettle(); |
| expect(find.text('Hi!'), findsOneWidget); |
| expect(find.text('Hello'), findsOneWidget); |
| }); |
| } |