[aspectj-users] Testing Aspect Alone

["lin hai" <linhaiting@xxxxxxxxxxx>]

I'm doing my project to develop a test tool for aspect-oriented programs. 
Now I am still at the stage of how to program to test the aspect alone and 
have some difficulties on this stage.

I have been thinking of how to test before(), after() and void around() 
advice which have no return value, which means no comparison can be made if 
there is  no return value and hence no expected value for these advices as 
mentioned above.  I've tried many ways to help implement the testing. One 
way is to add some extra code in advice to recognize the control flow, but 
adding code is really bad idea in testing field.  The other way is to 
compare the resulting value of variables or invoked methods used in advice 
with expected value, but these variables or invoked methods with return 
value do not always happen in advice, for example, how to test the 
following simple before() advice:

public aspect MannersAspect {
   pointcut deliverMessage()
	: call(* MessageCommunicator.deliver(..));

   before() : deliverMessage() {
	System.out.print("Hello! ");
   }
}

Does anyone have any other ways to test these advice? 
Any suggestions are welcome.

Adrian

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