模拟Rebus消息上下文需要事务

Question

我有这个代码来模拟Rebus MessageContext

    IBus fakeBus;
    IMessageContext messageContext;

    [TestInitialize]
    public void TestInitialize()
    {
        fakeBus = new FakeBus();
        var mock = new Mock<IMessageContext>();
        mock.Setup(m => m.ReturnAddress).Returns("queuename");
        mock.Setup(h => h.Headers).Returns(new Dictionary<string, object>());
        mock.Setup(m => m.Items).Returns(new Dictionary<string, object>());
        mock.Setup(m => m.RebusTransportMessageId).Returns(Guid.NewGuid().ToString());

        messageContext = mock.Object;

        var fakeContext = FakeMessageContext.Establish(messageContext); // error here
   }

但最后一行返回下面的堆栈跟踪。我在这里错过了什么？

旁注：我仍在使用Rebus 0.84。

结果StackTrace：

   at Rebus.MessageContext.Establish(IMessageContext messageContext, Boolean overwrite)
   at Rebus.Testing.FakeMessageContext.Establish(IMessageContext messageContext)
   at MyApp.Messaging.Tests.Handlers.RegisterPaymentCallbackTests.TestInitialize() in C:\CUT.Tests\Handlers\RegisterPaymentCallbackTests.cs:line 57
Result Message: Initialization method MyApp.Tests.Handlers.RegisterPaymentCallbackTests.TestInitialize threw exception. System.InvalidOperationException: Could not find a transaction context. There should always be a transaction context - though it might be a NoTransaction transaction context..