test for exception

> I have a setter method that tests input for validity using  
> 'assert'. It looks like this:
>
> aVariableName: aNumber
> self assert: [(aNumber >= self minValue) & (aNumber <= self  
> maxValue)]
> description: 'invalid value'.
> aVariableName := aNumber.
>
> The program needs to blow up if an invalid number is assigned. I  
> don't want to just quietly ignore the invalid assignment. That's  
> why I have this assertion.
>
> Anyway, the assertion blows up just fine, but now I'd like to write  
> a test that checks to see what happens if I try to assign an  
> invalid number.
>
> I *think* I should use something like:
>
> self should: [anObject aVariableName = anInvalidNumber] raise: ???
>
> raise: is supposed to get the ExceptionEvent, but I'm not sure how  
> to find out which event this would be. The debugger doesn't seem to  
> show this when the assertion fails.
>
> How do I know which exception event is raised? Or am I on the wrong  
> track completely?
>
> Thanks: John
>
>
>
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