C# 如何模拟这个异步方法?
我有一个大致如下的类:C# 如何模拟这个异步方法?,c#,unit-testing,asynchronous,mocking,moq,C#,Unit Testing,Asynchronous,Mocking,Moq,我有一个大致如下的类: public class ViewModel { public ViewModel(IWebService service) { this.WebService = service; } private IWebService WebService{get;set;} private IEnumerable<SomeData> MyData{get;set;} private void GetReferenceData(
public class ViewModel
{
public ViewModel(IWebService service)
{
this.WebService = service;
}
private IWebService WebService{get;set;}
private IEnumerable<SomeData> MyData{get;set;}
private void GetReferenceData()
{
this.WebService.BeginGetStaticReferenceData(GetReferenceDataOnComplete, null);
}
private void GetReferenceDataOnComplete(IAsyncResult result)
{
this.MyData = this.WebService.EndGetStaticReferenceData(result);
}
.
.
.
}
公共类视图模型
{
公共视图模型(IWebService)
{
this.WebService=service;
}
私有IWebService Web服务{get;set;}
私有IEnumerable MyData{get;set;}
私有void GetReferenceData()
{
this.WebService.BeginGetStaticReferenceData(GetReferenceDataOnComplete,null);
}
私有void GetReferenceDataOnComplete(IAsyncResult结果)
{
this.MyData=this.WebService.EndGetStaticReferenceData(结果);
}
.
.
.
}
我想模拟我的IWebService接口,以便在调用BeginGetStaticReferenceData时能够调用回调方法。我用的是最小起订量,我不知道怎么做。我的单元测试设置代码如下所示:
//Arrange
var service = new Mock<IWebService>();
service.Setup(x => x.BeginGetStaticReferenceData(/*.......don't know.....*/));
service.Setup(x => x.EndGetStaticReferenceData(It.IsAny<IAsyncResult>())).Returns(new List<SomeData>{new SomeData{Name="blah"}});
var viewModel = new ViewModel(service.Object);
.
.
//排列
var service=newmock();
service.Setup(x=>x.BeginGetStaticReferenceData(/*……不知道……*/);
Setup(x=>x.EndGetStaticReferenceData(It.IsAny()).Returns(new List{new SomeData{Name=“blah”});
var viewModel=新的viewModel(service.Object);
.
.
这篇文章很好地解释了如何使用Rhino Mock测试异步方法-我相信它可以很容易地改为使用Moq。以下是如何:
[TestMethod]
public void Test10()
{
var expectedData = new[]{new SomeData(), new SomeData()};
AsyncCallback callback = null;
IAsyncResult ar = new Mock<IAsyncResult>().Object;
var webServiceStub = new Mock<IWebService>();
webServiceStub
.Setup(ws => ws.BeginGetStaticReferenceData(It.IsAny<AsyncCallback>(), null))
.Callback((AsyncCallback cb, object state) => callback = cb)
.Returns(ar);
webServiceStub
.Setup(ws => ws.EndGetStaticReferenceData(It.IsAny<IAsyncResult>()))
.Returns(expectedData);
var sut = new ViewModel(webServiceStub.Object);
sut.DoIt();
callback(ar);
Assert.AreEqual(expectedData, sut.MyData);
}
[TestMethod]
公开测试10()
{
var expectedData=new[]{new SomeData(),new SomeData()};
AsyncCallback=null;
IAsyncResult ar=新建Mock().Object;
var webServiceStub=new Mock();
webServiceStub
.Setup(ws=>ws.BeginGetStaticReferenceData(It.IsAny(),null))
.Callback((异步回调cb,对象状态)=>Callback=cb)
.应收账款(ar);
webServiceStub
.Setup(ws=>ws.EndGetStaticReferenceData(It.IsAny()))
.返回(预期数据);
var sut=newviewmodel(webServiceStub.Object);
sut.DoIt();
回收(ar);
Assert.AreEqual(expectedData、sut.MyData);
}
此测试假设一个稍微修改的ViewModel,我在其中添加了一些公共成员,以便对其进行测试:
public class ViewModel
{
public ViewModel(IWebService service)
{
this.WebService = service;
}
public IEnumerable<SomeData> MyData { get; set; }
public void DoIt()
{
this.GetReferenceData();
}
private IWebService WebService { get; set; }
private void GetReferenceData()
{
this.WebService.BeginGetStaticReferenceData(GetReferenceDataOnComplete, null);
}
private void GetReferenceDataOnComplete(IAsyncResult result)
{
this.MyData = this.WebService.EndGetStaticReferenceData(result);
}
}
公共类视图模型
{
公共视图模型(IWebService)
{
this.WebService=service;
}
公共IEnumerable MyData{get;set;}
公共无效DoIt()
{
此参数为.GetReferenceData();
}
私有IWebService Web服务{get;set;}
私有void GetReferenceData()
{
this.WebService.BeginGetStaticReferenceData(GetReferenceDataOnComplete,null);
}
私有void GetReferenceDataOnComplete(IAsyncResult结果)
{
this.MyData=this.WebService.EndGetStaticReferenceData(结果);
}
}
我尝试将其用于UdpClient,只有当我将您的回调从=>callback=cb
更改为=>cb(ar)
时,它才起作用。不知道我是否已经黑客怪物或什么…什么是模拟类以上?是你的课还是我需要添加一些参考来使用它?