如何模拟WebOperationContext进行单元测试

public class AwesomeRestService : AwesomeRestServiceBase, IAwesomeRestService
    {
        public AwesomeSearchResults<AwesomeProductBase> GetAwesomeResultsAsXml()
        {
            return GetResults();
        }
        private static AwesomeSearchResults<AwesomeProductBase> GetResults()
        {
            var searchContext = AwesomeSearchContext
                               .Parse(WebOperationContext.Current);
            ..............
            ..............
            ..............
        }

    }
[ServiceContract]
    public interface IAwesomeRestService
    {
        [OperationContract]
        [WebInvoke(Method = "GET", ResponseFormat = WebMessageFormat.Xml,
        BodyStyle =  WebMessageBodyStyle.Bare,
            UriTemplate = "/search/xml")]
        AwesomeQueryResults<AwesomeProductBase> GetAwesomeResultsAsXml();

    }



public class AwesomeSearchContext
        {
            ................
            ................
            ................
             public static AwesomeSearchContext Parse 
                                           (WebOperationContext operationContext)
            {
                return WebOperationContext.Current != null ? new     
 AwesomeSearchContext(operationContext.IncomingRequest.UriTemplateMatch.QueryParameters) : null;
            }
        }

我遇到了同样的问题。我想在没有任何IIS的情况下对WCF服务功能(用于IOauth2接口，如下面的示例)进行单元测试。这是准备的代码片段。

// Prepare WebOperationContext
var factory = new ChannelFactory<IOauth2>(
    new WebHttpBinding(),
    new EndpointAddress("http://localhost:80"));
OperationContext.Current = new OperationContext(factory.CreateChannel() as IContextChannel);
Debug.Assert(WebOperationContext.Current != null);

我按照Sanjay的回答，尝试了MS fake框架，

首先，你必须open "Solution Explorer > your test project > Reference" => right-click the "System.ServiceModel.Web" => press "add Fakes Assembly"

参考:

using Microsoft.QualityTools.Testing.Fakes;
using System.ServiceModel.Web.Fakes;

示例:

using (ShimsContext.Create())
{
    var response = new ShimOutgoingWebResponseContext();
    var request = new ShimIncomingWebRequestContext();
    var ctx_hd = new WebHeaderCollection();
    ctx_hd.Add("myCustomHeader", "XXXX");
    request.HeadersGet = () => ctx_hd;
    var ctx = new ShimWebOperationContext
    {
        OutgoingResponseGet = () => response,
        IncomingRequestGet = () => request
    };
    ShimWebOperationContext.CurrentGet = () => ctx;
    //Test your code here...
}

，现在你可以得到WebOperationContext.Current.IncomingRequest。头文件["myCustomHeader"]现在在你的WCF服务代码。

关于MSDN上的MS Fakes框架的更多信息:https://msdn.microsoft.com/en-us/library/hh549176.aspx

一种常见的方法是mock工具，如moq (https://code.google.com/p/moq/)或rhinomocks。

因为它们不允许你模拟静态成员，所以你需要包装对webcontext.current的调用。下面是一个用moq封装静态成员并进行测试的例子:用moq

如果你还没有使用MS Fakes框架，这可能是多余的，但如果你是，这对我来说很有用。

using (ShimsContext.Create())
        {
            var response = new ShimOutgoingWebResponseContext();
            var ctx = new ShimWebOperationContext
            {
                OutgoingResponseGet = () => response
            };
            ShimWebOperationContext.CurrentGet = () => ctx;
            try
            {
                ParameterInspector.BeforeCall("operationName", new string[]{"some_argument"} );
            }
            catch (Exception e)
            {
                Assert.IsNull(e);
            }
        }

为您的服务创建一个客户端，然后在客户端中处理OperationContext:

public class AwesomeRestServiceClient : ClientBase<IAwesomeRestService>, IAwesomeRestService
{
    public class AwesomeRestServiceClient(string address)
        : base(new WebHttpBinding(), new EndpointAddress(address))
    {   
        this.Endpoint.EndpointBehaviors.Add(new WebHttpBehavior());
    }
    public AwesomeSearchResults<AwesomeProductBase> GetAwesomeResultsAsXml()
    {
        using (new OperationContextScope(this.InnerChannel))
        {
            return base.Channel.GetAwesomeResultsAsXml();
        }
    }
}