C# 必须配置“Microsoft.Activities.UnitTesting.Stubs.IMessagingStub”类型的扩展才能运行此工作流

我有一个工作流服务，我需要为工作流服务运行单元测试

以下是代码：

[TestClass]
public class WorkflowServiceTest
{
    private readonly Binding _binding = new NetNamedPipeBinding();
    private readonly EndpointAddress _serviceAddress = new EndpointAddress("net.pipe://localhost/WorkflowService");


    [TestMethod]
    [DeploymentItem(@"WorkflowServices\WorkflowService.xamlx")]
    public void StartWorkFlow()
    {
        #region Test 2
        var xamlInjector = new XamlInjector("WorkflowService.xamlx");
        xamlInjector.ReplaceAll
            (typeof(ExecutePofolioControllerActivityAsync), typeof(MockExecutePofolioControllerActivityAsync));
        xamlInjector.ReplaceAll
            (typeof (GetPortfolioControllerStatusActivity), typeof (MockGetPortfolioControllerStatusActivity));
        xamlInjector.ReplaceAll(typeof (GetTraderStatusesActivity), typeof (MockGetTraderStatusesActivity));
        xamlInjector.ReplaceAll(typeof(Delay),typeof(DelayStub));
        xamlInjector.ReplaceAll(typeof(Receive), typeof(ReceiveStub));
        xamlInjector.ReplaceAll(typeof(SendReply), typeof(SendReplyStub));

        // Then we load the service and replace the activities with mocks
        var mockedService = xamlInjector.GetWorkflowService();

        DelayStub.StubDuration = TimeSpan.FromSeconds(10);

        WorkflowServiceTestHost host = null;
        try
        {
            // Host the service
            using (host = WorkflowServiceTestHost.Open(mockedService, _serviceAddress))
            {
                // Setup a proxy to use named pipes
                var proxy = new WorkflowServiceClient(this._binding, this._serviceAddress);

                var serviceTask = new ServiceTask
                {
                    UserId = ValidId,
                    TaskType = TaskType.Start,
                    IssuerName = "UserTest",
                };

                proxy.Start(serviceTask);
            }
        }
        finally
        {
            if (host != null)
            {
                host.Tracking.Trace();
            }
        }

        #endregion

    }
}

因此，当我运行debug UnitTest时，我在第行使用host=WorkflowServiceTestHost.OpenmockedService，_serviceAddress:

以下是错误：

试验方法 StartWorkFlow引发异常： System.Activities.ValidationException:必须配置“Microsoft.Activities.UnitTesting.Stubs.IMessagingStub”类型的扩展才能运行此工作流

我不知道为什么我会收到那个错误

---

有人能告诉我正确的代码吗？

1创建IMessagingStub的实现2将其添加到工作流服务扩展3修复程序errors@Will：我们如何用上面的代码创建IMessagingStub的实现，我试着研究了一下，但还是没有找到，你能给我一个示例代码吗？没有。我不知道。从公共类MessagingStub开始：IMessagingStub。