// 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.0.dart' as example; import 'package:flutter_test/flutter_test.dart'; void main() { testWidgets('Switch tabs in the TabBar', (WidgetTester tester) async { await tester.pumpWidget( const example.TabBarApp(), ); final TabBar tabBar = tester.widget<TabBar>(find.byType(TabBar)); expect(tabBar.tabs.length, 3); final Finder tab1 = find.widgetWithIcon(Tab, Icons.cloud_outlined); final Finder tab2 = find.widgetWithIcon(Tab, Icons.beach_access_sharp); final Finder tab3 = find.widgetWithIcon(Tab, Icons.brightness_5_sharp); const String tabBarViewText1 = "It's cloudy here"; const String tabBarViewText2 = "It's rainy here"; const String tabBarViewText3 = "It's sunny here"; expect(find.text(tabBarViewText1), findsNothing); expect(find.text(tabBarViewText2), findsOneWidget); expect(find.text(tabBarViewText3), findsNothing); await tester.tap(tab1); await tester.pumpAndSettle(); expect(find.text(tabBarViewText1), findsOneWidget); expect(find.text(tabBarViewText2), findsNothing); expect(find.text(tabBarViewText3), findsNothing); await tester.tap(tab2); await tester.pumpAndSettle(); expect(find.text(tabBarViewText1), findsNothing); expect(find.text(tabBarViewText2), findsOneWidget); expect(find.text(tabBarViewText3), findsNothing); await tester.tap(tab3); await tester.pumpAndSettle(); expect(find.text(tabBarViewText1), findsNothing); expect(find.text(tabBarViewText2), findsNothing); expect(find.text(tabBarViewText3), findsOneWidget); }); }