Raising obfuscated events with moq throws error

问题

We have using Moq for two month now. However there is a problem which can not solve somehow.

In visual studio all tests succeeded just fine. On the build server there are several tests which failed. What they have in common is, that they use the "raise" method to throw an event. Our build server tests obfuscated what is good to find obfuscation errors. Every "normal" expectation like "Setup(something).Returns(something)" works. Only the raise event fails. the stacktrace looks like the following:

MESSAGE:
Test method Ade.Graphic.Presenter.Test.RoutingEngineTest.TestRouteOverLadderLinesWithFbd threw exception: 
System.ArgumentException: Could not locate event for attach or detach method Void ᜀ(ᦜ[ᢈ]).
+++++++++++++++++++
STACK TRACE:
    bei Moq.Extensions.GetEvent[TMock](Action`1 eventExpression, TMock mock)
   bei Moq.Mock`1.Raise(Action`1 eventExpression, EventArgs args)
   bei Ade.Graphic.Presenter.Test.RoutingEngineTest.TestRouteOverLadderLinesWithFbd()

The code for this is:

documentEventHandler.Raise(stub => stub.DocumentChanged += null,
                                                new DocumentChangeEventArgs(DocumentChangeTypes.ViewUpdate));

We have no idea what is the difference between the code above and this

eventHandler.SetupGet(stub => stub.DocumentChangeNotify).Returns(documentEventHandler.Object);

because this code works fine.

Does anyone had the same problem or at least can tell what the difference is?

回答1:

The error comes probably (not sure as not tested) from the fact that events (i.e. DocumentChanged) are actually generated as 2 accessors: add_DocumentChanged and remove_DocumentChanged . This is similar to the properties that have the get and set accessors.

What the obfuscator did most probably is rename this add_DocumentChanged and remove_DocumentChanged. However, looking at the moq source code, I can see that moq relies on the events accessor keeping the same name:

 var ev = addRemove.DeclaringType.GetEvent(
                            addRemove.Name.Replace("add_", string.Empty).Replace("remove_", string.Empty));

ev == null in this case, which raises an error.

In your second examples, you're using delegates which are not broken down into add_ and remove_ accessors.

You're probably better off not obfuscating events.

来源：https://stackoverflow.com/questions/16669885/raising-obfuscated-events-with-moq-throws-error

标签

events

moq

obfuscation