如何使用 Moq 测试 ServiceStack 服务

我有一个使用 ServiceStack 创建的休息服务，使用 nHibernate 作为从 SqlCe 数据库获取数据的方式。我一直在尝试使用 nUnit 和 Moq 编写一些单元测试 - 我已成功模拟 nHibernate 实现以返回 null、无效对象等 - 但我的测试总是抛出NullReferenceException当它调用基类来设置 HttpStatus 等时。

public List <ParameterDto> Get (ParameterAll parameterAll)
    {
        List <ParameterDto> parameterResponseList = new List <ParameterDto> ();
        try
        {
            List <ParameterDomainObject> parameterDomainObjectList = _ParameterDao.getAllParameters ();
            foreach (ParameterDomainObject parameterDomainObject in parameterDomainObjectList)
            {
                parameterResponseList.Add (parameterDomainObject.ToDto ());
            }
        }
        catch (WebServiceException webEx)
        {
            Debug.WriteLine ("WebServiceException.ErrorCode         " + webEx.ErrorCode);
            Debug.WriteLine ("WebServiceException.ErrorMessage      " + webEx.ErrorMessage);
            Debug.WriteLine ("WebServiceException.ResponseStatus    " + webEx.ResponseStatus);
            Debug.WriteLine ("WebServiceException.StatusCode        " + webEx.StatusCode);
            Debug.WriteLine ("WebServiceException.StatusDescription " + webEx.StatusDescription);
            Debug.WriteLine ("WebServiceException.ErrorCode         " + webEx.ErrorCode);
        }
        catch (DomainObjectNotFoundException domainObjectNotFoundException)
        {
            base.Response.StatusCode = (int) HttpStatusCode.NotFound;
            base.Response.AddHeader ("Reason",
                                     domainObjectNotFoundException.Message);
        }
        catch (Exception exception)
        {
            Debug.WriteLine ("Exception: " + exception.Message);
            base.Response.StatusCode = (int) HttpStatusCode.InternalServerError;
            base.Response.AddHeader ("Reason",
                                     exception.Message);
        }
        /* Always throws an exception here, or anywhere base.Response is called */
        base.Response.StatusCode = (int) HttpStatusCode.OK;
        base.Response.AddHeader ("Reason",
                                 Strings.ParameterRestResponse_Get_OK);
        return parameterResponseList;
    }

当使用 RestClient 和 Firefox 测试该服务时，当我注释掉该服务时，该服务工作正常base.Response代码，所以我猜我只是没有在单元测试中正确设置一些东西？

    [Test]
    public void Test_Method_Get_AllParameters_Unsucessful ()
    {
        Mock <IRequestContext> mockedRequestContext = new Mock<IRequestContext>();
        mockedRequestContext.SetupGet(f => f.AbsoluteUri).Returns("http:/localhost:8080/parameters/all");

        Mock<IParameterDao> mockedParameterDao = new Mock<IParameterDao>();
        mockedParameterDao.Setup (returns => returns.getAllParameters ()).Returns (new List <ParameterDomainObject> ());
        Assert.IsNotNull (mockedParameterDao);

        ParameterRestService service = new ParameterRestService(mockedParameterDao.Object)
        {
            RequestContext = mockedRequestContext.Object
        };

        List <ParameterDto> parameterDtos = service.Get (new ParameterAll ());
    }

看起来您只需要模拟 Service 类的 Response 属性。它受到没有设置器的保护，但你应该能够模拟它做类似的事情......

    Mock<IRequestContext> mockedRequestContext = new Mock<IRequestContext>();
    Mock<IHttpResponse> mockedResponse = new Mock<IHttpResponse>();
    mockedRequestContext.SetupGet(f => f.AbsoluteUri).Returns("http:/localhost:8080/parameters/all");
    mockedRequestContext.Setup(f => f.Get<IHttpResponse>()).Returns(mockedResponse.Object);