| // 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_drawer/navigation_drawer.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.NavigationDrawerApp(), |
| ); |
| |
| await tester.tap(find.text('Open Drawer')); |
| await tester.pumpAndSettle(); |
| |
| final NavigationDrawer navigationDrawerWidget = tester.firstWidget(find.byType(NavigationDrawer)); |
| |
| /// NavigationDestinations must be rendered |
| expect(find.text('Messages'), findsNWidgets(2)); |
| expect(find.text('Profile'), findsNWidgets(2)); |
| expect(find.text('Settings'), findsNWidgets(2)); |
| |
| /// Initial index must be zero |
| expect(navigationDrawerWidget.selectedIndex, 0); |
| expect(find.text('Page Index = 0'), findsOneWidget); |
| |
| /// Switch to second tab |
| await tester.tap(find.ancestor(of: find.text('Profile'), matching: find.byType(InkWell))); |
| await tester.pumpAndSettle(); |
| expect(find.text('Page Index = 1'), findsOneWidget); |
| |
| /// Switch to fourth tab |
| await tester.tap(find.ancestor(of: find.text('Settings'), matching: find.byType(InkWell))); |
| await tester.pumpAndSettle(); |
| expect(find.text('Page Index = 2'), findsOneWidget); |
| }); |
| } |