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Ruby VCR 库使您能够“记录测试套件的 HTTP 交互，并在未来的测试运行期间重放它们，以实现快速、确定、准确的测试。”

我想使用 ServiceStack 的 JsonServiceClient 创建类似的东西，但我无法让它工作。我最近失败的尝试如下。我想让我目前的尝试工作，或者对另一种可行的方法提出建议。

public static class Memoization
{
    public static Func<T, TResult> AsCached<T, TResult>(this Func<T, TResult> function)
    {
        var cachedResults = new Dictionary<T, TResult>();
        string filename = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData) + "\\" + (typeof(TResult)).Name + ".jsv";
        var serializer = MessagePackSerializer.Create<Dictionary<T, TResult>>();

        if (cachedResults.Count == 0)
        {
            ////// load cache from file
            using (FileStream fs = new FileStream(filename, FileMode.Create, FileAccess.Write))
            {
                cachedResults = serializer.Unpack(fs);
            }
        }

        return (argument) =>
        {
            TResult result;
            lock (cachedResults)
            {
                if (!cachedResults.TryGetValue(argument, out result))
                {
                    result = function(argument);
                    cachedResults.Add(argument, result);


                    ////// update cache file
                    using (FileStream fs = new FileStream(filename, FileMode.Create, FileAccess.Write))
                    {
                        serializer.Pack(fs, cachedResults);
                    }
                }
            }
            return result;
        };
    }

}
class MemoizeJsonClient<TResponse> : JsonServiceClient, IServiceClient, IRestClient
{
    private Func<IReturn<TResponse>, TResponse> _getCached;
    private JsonServiceClient client;

    public TResponse Get(IReturn<TResponse> request)
    {
        if (_getCached == null)
        {
            Func<IReturn<TResponse>, TResponse> func = GetImpl;
            _getCached = func.AsCached();
        }
        return _getCached(request);
    }

    private TResponse GetImpl(IReturn<TResponse> request)
    {
        return client.Get(request);
    }

    public MemoizeJsonClient(string BaseUri) {
        client = new JsonServiceClient(BaseUri);
    }
}

像这样调用：

[Test]
public void TestReports2()
{
    string Host = "http://localhost:1337";
    string BaseUri = Host + "/";

    List<Options> testcases = new List<Options>();
    testcases.Add(new Options("Name", "20130815", "20130815"));

    foreach (Options options in testcases)
    {
        TransactionsReq transRequest = new TransactionsReq();
        transRequest.source = "Source";
        transRequest.name = new List<String>(new string[] { options.Name });
        transRequest.startDate = options.StartDate;
        transRequest.endDate = options.EndDate;
        MemoizeJsonClient<TransactionsReqResponse> client = new MemoizeJsonClient<TransactionsReqResponse>(BaseUri);
        List<Transaction> transactions;

        TransactionsReqResponse transResponse = client.Get(transRequest);
        transactions = transResponse.data;
    }
}

但我收到以下错误：

System.Runtime.Serialization.SerializationException occurred
  HResult=-2146233076
  Message=Cannot serialize type 'ServiceStack.ServiceHost.IReturn`1[ImagineServerWrapper.DTO.TransactionsReqResponse]' because it does not have any serializable fields nor properties.
  Source=MsgPack
  StackTrace:
       at MsgPack.Serialization.SerializerBuilder`1.CreateSerializer()
  InnerException:
4

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