// 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_api_samples/material/expansion_tile/expansion_tile.1.dart'asexample;import'package:flutter_test/flutter_test.dart';voidmain(){testWidgets('Test the basics of ExpansionTileControllerApp',(WidgetTestertester)async{awaittester.pumpWidget(constexample.ExpansionTileControllerApp(),);expect(find.text('ExpansionTile Contents'),findsNothing);expect(find.text('Collapse This Tile'),findsNothing);awaittester.tap(find.text('Expand/Collapse the Tile Above'));awaittester.pumpAndSettle();expect(find.text('ExpansionTile Contents'),findsOneWidget);awaittester.tap(find.text('Expand/Collapse the Tile Above'));awaittester.pumpAndSettle();expect(find.text('ExpansionTile Contents'),findsNothing);awaittester.tap(find.text('ExpansionTile with implicit controller.'));awaittester.pumpAndSettle();expect(find.text('Collapse This Tile'),findsOneWidget);awaittester.tap(find.text('Collapse This Tile'));awaittester.pumpAndSettle();expect(find.text('Collapse This Tile'),findsNothing);});}