如何模拟WebOperationContext进行单元测试?

时间:2013-04-17 19:00:19

标签: c# wcf unit-testing rest weboperationcontext

我正在尝试为以下WCF休息服务的GetAwesomeResultsAsXml()编写单元测试(更多的集成测试)。
我如何处理WebOperationContext嘲弄方面?
什么是最好的方法?

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;
            }
        }

5 个答案:

答案 0 :(得分:6)

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(对于IOauth2接口,如下例)进行单元测试。这是准备工作的代码段。

// 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);

答案 1 :(得分:3)

我按照Sanjay的回答,尝试了MS假框架,

首先,您必须open "Solution Explorer > your test project > Reference" =&gt; right-click the "System.ServiceModel.Web" =&gt; 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...
}

现在您可以在WCF服务代码中获取WebOperationContext.Current.IncomingRequest.Headers [“myCustomHeader”]。

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

答案 2 :(得分:1)

常见的方法是使用moq(https://code.google.com/p/moq/)或rhinomocks等模拟工具。

由于它们不允许您模拟静态成员,因此需要将调用包装到webcontext.current。下面是一个包装静态mmember并使用moq进行测试的示例:Mock static property with moq

答案 3 :(得分:1)

如果你还没有使用MS Fakes框架,可能有点矫枉过正,但是如果你这样做对我有用。

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);
            }
        }

答案 4 :(得分:0)

为您的服务创建一个客户端,然后在客户端内处理 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();
        }
    }
}

有关如何使用它的更多信息,请参阅this answer