Rebus消息上下文的模拟需要事务处理

Question

我有这个代码来模拟一个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
   }

但是最后一行返回下面的堆栈跟踪。我遗漏了什么?

旁注:我仍然在Rebus 0.84。

Result 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.TestsHandlersRegisterPaymentCallbackTests.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..

Answer 1

我自己并没有真正使用假消息上下文，因为我通常发现使用SagaFixture或对稍大的单元进行单元测试更容易。

当我查看旧的Rebus代码时，我可以看到所有执行FakeMessageContext的测试都首先建立了一个事务上下文，如下所示:

using (TransactionContext.None()) using (FakeMessageContext.Establish(fakeContext)) { // do stuff }

所以必须这样做:)