// 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/widgets.dart';import'package:flutter_api_samples/widgets/layout_builder/layout_builder.0.dart'asexample;import'package:flutter_test/flutter_test.dart';voidmain(){testWidgets('has two containers when wide',(WidgetTestertester)async{awaittester.pumpWidget(constexample.MyApp(),);finalFindercontainerFinder=find.byType(Container);expect(containerFinder,findsNWidgets(2));});testWidgets('has one container when narrow',(WidgetTestertester)async{awaittester.pumpWidget(ConstrainedBox(constraints:constBoxConstraints(maxWidth:400),child:constexample.MyApp(),),);finalFindercontainerFinder=find.byType(Container);expect(containerFinder,findsNWidgets(2));});}