Re: [MO-java-dev] mocks of classes

[Steve F. <st...@m3...>]

we've been adding support for classes in the new jmock implementation, 
and I believe that easymock has a similar patch. But I think you're 
kinda missing the point. Using mocks for stubbing external libraries is 
a useful technique, but the real point is to use them to drive your 
design, hence: OnlyMockYourOwnInterfaces.

If you're doing TDD, you might want to get some practice with your own 
code and then let us know how that works out.

S.


Dmitri Colebatch wrote:
> I've _almost_ used mock objects several times over the last year or so, but
> never quite taken the final step.  I'm currently at that point again, this
> time to improve our test coverage in relation to SAP.  We use JCO to connect
> to SAP, and my current need is to come up with some way to run our tests
> without involving SAP.  Obvious solution: mock objects.
> 
> Couple of problems.  Firstly is this wiki page:
> http://www.mockobjects.com/wiki/OnlyMockYourOwnInterfaces  I disagree with
> the idea of reimplementing an interface to an external party, especially in
> a scenario like this where changing the way we talk to SAP is going to
> change code regardless of how many layers we put in.  However, I'm not
> terribly worried about this.
> 
> The real problem is the reliance on java.lang.reflect.Proxy.  This only
> allows for interfaces.  I'm wondering if anyone has ever looked at making
> mocks of classes?  Using user-provided instances, with interceptors, I dont
> imagine it would be too hard to do, but would like to hear from you guys who
> know the code a lot better than I do.
> 
> thoughts?
> 
> cheers
> dim
> 
> 
> 
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