单元测试ServiceStack缓存异常

Question

我想单元测试一些ServiceStack服务。这些服务使用缓存。我可以成功地模拟我的依赖关系，并使用MockRequestContext调用我的服务就好了。但是，当我的服务回报它的DTO的base.RequestContext.ToOptimizedResultUsingCache里面，我从下面的调用一个空引用异常：

ServiceStack.CacheAccess.Providers.CacheClientExtensions.Cache(ICacheClient cacheClient, String cacheKey, Object responseDto, IRequestContext context, Nullable`1 expireCacheIn) 

我的测试低于

[TestMethod] 
    public void GetAgencyCase_Returns_AgencyCaseDetailsResponse() 
    { 
     Container container = new Container(); 

     Mock<IChangeRequestService> changeRequestService = new Mock<IChangeRequestService>(); 
     Mock<IRequestService> requestService = new Mock<IRequestService>(); 

     //Build the case we want returned 
     Case testCase = Builder<Case>.CreateNew() 
      .With(x => x.CaseId = "123") 
      .And(x => x.CaseNumber = "456") 
      .With(x => x.Agencies = Builder<CasesAgency>.CreateListOfSize(1) 
       .All() 
       .With(m => m.Agency = Builder<Agency>.CreateNew().With(z => z.AgencyId = 2).And(z => z.AgencyName = "Test").Build()) 
       .Build()) 
      .With(x => x.Requests = Builder<Request>.CreateListOfSize(5) 
       .Build()) 
       .Build(); 

     requestService.Setup<Case>(x => x.GetCase(It.IsAny<CaseSearchCriteria>(), It.IsAny<AuthenticatedUser>())) 
      .Returns(testCase); 

     container.Register<IChangeRequestService>(changeRequestService.Object); 
     container.Register<IRequestService>(requestService.Object); 

     container.Register<ILog>(new Mock<ILog>().Object); 
     container.Register<ICacheClient>(new MemoryCacheClient()); 
     container.RegisterAutoWired<AgencyCaseService>(); 

     var service = container.Resolve<AgencyCaseService>(); 
     service.SetResolver(new BasicResolver(container)); 

     var context = new MockRequestContext() { ResponseContentType = ContentType.Json }; 
     context.CreateAppHost(); 

     service.RequestContext = context; 


     var response = service.Get(new GetAgencyCase { AgencyId = 2, AgencyCaseNumber = "123" }); 
     ...assert stuff 
    } 

一切设置看起来很好，当我打电话给我服务的方法，但是我得到空引用异常时，DTO被保存在这里

try 
     { 
      var cacheKey = UrnId.Create<GetAgencyCase>(
       request.AgencyId.ToString() + 
       request.AgencyCaseNumber); 

      var cacheExpireTime = TimeSpan.FromMinutes(_cacheDuration); 

      return base.RequestContext.ToOptimizedResultUsingCache<AgencyCaseDetailsResponse>(base.Cache, cacheKey, cacheExpireTime,() => 
       { ...business logic 
        return agencyCaseDto; 
       } 

Answer 1

每mythz建议见于评论缓存中，我添加编辑一个应用程序主机，并使用其容器，测试工作。以下是更新的测试。

[TestMethod] 
    public void GetAgencyCase_Returns_AgencyCaseDetailsResponse() 
    { 
     var appHost = new BasicAppHost().Init();//this is needed for caching 
     Container container = appHost.Container; 

     Mock<IChangeRequestService> changeRequestService = new Mock<IChangeRequestService>(); 
     Mock<IRequestService> requestService = new Mock<IRequestService>(); 

     //Build the case we want returned 
     Case testCase = Builder<Case>.CreateNew() 
      .With(x => x.CaseId = "123") 
      .And(x => x.CaseNumber = "456") 
      .With(x => x.Agencies = Builder<CasesAgency>.CreateListOfSize(1) 
       .All() 
       .With(m => m.Agency = Builder<Agency>.CreateNew().With(z => z.AgencyId = 2).And(z => z.AgencyName = "Test").Build()) 
       .Build()) 
      .With(x => x.Requests = Builder<Request>.CreateListOfSize(5) 
       .Build()) 
       .Build(); 

     requestService.Setup<Case>(x => x.GetCase(It.IsAny<CaseSearchCriteria>(), It.IsAny<AuthenticatedUser>())) 
      .Returns(testCase); 

     container.Register<IChangeRequestService>(changeRequestService.Object); 
     container.Register<IRequestService>(requestService.Object); 

     container.Register<ILog>(new Mock<ILog>().Object); 
     container.Register<ICacheClient>(new MemoryCacheClient()); 
     container.RegisterAutoWired<AgencyCaseService>(); 

     var service = container.Resolve<AgencyCaseService>(); 
     service.SetResolver(new BasicResolver(container)); 

     var context = new MockRequestContext() { ResponseContentType = ContentType.Json }; 

     service.RequestContext = context; 


     var response = service.Get(new GetAgencyCase { AgencyId = 2, AgencyCaseNumber = "123" }); 
     ...assert stuff 
    }