// 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/tabs/tab_bar.2.dart' as example; import 'package:flutter_test/flutter_test.dart'; void main() { testWidgets('Switch tabs in the TabBar', (WidgetTester tester) async { const String primaryTabLabel1 = 'Flights'; const String primaryTabLabel2 = 'Trips'; const String primaryTabLabel3 = 'Explore'; const String secondaryTabLabel1 = 'Overview'; const String secondaryTabLabel2 = 'Specifications'; await tester.pumpWidget( const example.TabBarApp(), ); final TabBar primaryTabBar = tester.widget<TabBar>(find.byType(TabBar).last); expect(primaryTabBar.tabs.length, 3); final TabBar secondaryTabBar = tester.widget<TabBar>(find.byType(TabBar).first); expect(secondaryTabBar.tabs.length, 2); String tabBarViewText = '$primaryTabLabel2: $secondaryTabLabel1 tab'; expect(find.text(tabBarViewText), findsOneWidget); await tester.tap(find.text(primaryTabLabel1)); await tester.pumpAndSettle(); tabBarViewText = '$primaryTabLabel1: $secondaryTabLabel1 tab'; expect(find.text(tabBarViewText), findsOneWidget); await tester.tap(find.text(secondaryTabLabel2)); await tester.pumpAndSettle(); tabBarViewText = '$primaryTabLabel1: $secondaryTabLabel2 tab'; expect(find.text(tabBarViewText), findsOneWidget); await tester.tap(find.text(primaryTabLabel2)); await tester.pumpAndSettle(); tabBarViewText = '$primaryTabLabel2: $secondaryTabLabel1 tab'; expect(find.text(tabBarViewText), findsOneWidget); await tester.tap(find.text(secondaryTabLabel2)); await tester.pumpAndSettle(); tabBarViewText = '$primaryTabLabel2: $secondaryTabLabel2 tab'; expect(find.text(tabBarViewText), findsOneWidget); await tester.tap(find.text(primaryTabLabel3)); await tester.pumpAndSettle(); tabBarViewText = '$primaryTabLabel3: $secondaryTabLabel1 tab'; expect(find.text(tabBarViewText), findsOneWidget); await tester.tap(find.text(secondaryTabLabel2)); await tester.pumpAndSettle(); tabBarViewText = '$primaryTabLabel3: $secondaryTabLabel2 tab'; expect(find.text(tabBarViewText), findsOneWidget); }); }