// 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/widgets/basic/aspect_ratio.0.dart'asexample;import'package:flutter_test/flutter_test.dart';voidmain(){testWidgets('AspectRatio applies 16 / 9 aspect ratio on its child',(WidgetTestertester)async{constdoubleheight=100.0;awaittester.pumpWidget(constexample.AspectRatioApp(),);finalSizeparentContainer=tester.getSize(find.byType(Container).first);expect(parentContainer.width,800.0);expect(parentContainer.height,height);finalSizechildContainer=tester.getSize(find.byType(Container).last);expect(childContainer.width,height*16/9);expect(childContainer.height,height);});}