[TIP] [nose] handling other types of testsuite

[Chris Withers]

Hi Jason,

So, I release the nose_fixes plugin primarily to support projects of 
mine that still had test_suite functions in test modules that are called 
to return a pre-built TestSuite instance.

This all worked fine, however I noticed that any tests returned from one 
of these functions wasn't being included in things like the xunit output.

After a bit of digging, this appears to be because the suites being 
returned don't smell like a "nose TestSuite", whatever one of those 
might be.

 From reading the comments int the source, it looks like nose's own 
doctest plugin may suffer from the same issue...

...so, I was wondering what your thoughts are in terms of dealing with 
TestSuite-ish objects that aren't generated by nose?

cheers,

Chris

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