Re: [MO-java-users] Mocking Files

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

Alternatively, wrap File in a very shallow decorator that describes the
behaviour you want in terms of your domain. Then provide mock and real
implementations of that decorator.

S.

Jeff Martin wrote:
> Probably the thing to do whould be to change the alt.java.io.File
> interface to use a alt.java.io.FileFilter instead of java.io.FileFilter
> which would use alt.java.io.File instead of java.io.File
> 
> On Tue, 2003-04-22 at 22:49, Chris Sterritt wrote:
> 
>>Hello,
>>
>>        I'd like to be able to use MockObjects with a fairly complicated
>>FileFilter-implementing class.  In particular, I'd like to be able to set
>>up a pseudo-directory tree (thanks to MockFile) and then verify that everything
>>found is as it should be.  However, I find that the class I want to test can't
>>take a File as an argument to the method that searches the directory, because
>>then I can't use a MockFile (similarly, the FileFilter-implementing
>>class can't have an accept(MockFile mf) since that doesn't fulfil the
>>interface).
>>
>>        Is the right thing to have two versions of each method, or to implement
>>some interface (MyFile) with a class that delegates to a real File in real
>>code, and a MockFile in testing?
>>
>>        Thanks,
>>        --chris sterritt
>>
>>
>>
>>
>>
>>
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