[Zope-CMF] View classes / testing

[pete]

Hi,

I've been looking at making a view class for the RSS syndication in 
CMFDefault, and I've got all the forms and templates working fine.  So 
now it's on to testing!

Has anyone written many tests for a view class?  I'm not quite sure how 
to set the tests up, i.e. put the request and context in the right 
place.  If there is an example floating round, please point me in the 
right direction!

Also, what's the approach to backwards compatibility.  For example, in 
the goldegg_folder_contents branch, the templates all fail gracefully if 
the view class is not available, by calling python scripts or whatever. 
  And the templates have remained in the skins folder rather than moving 
somewhere new.  Is this the general approach?

Thanks,

pete