[Zope-dev] Why does restrictedTraverse() in Zope 2 not respect IPublishTraverse adapters?

[Martin Aspeli]

Jan Hackel wrote:
> Some days ago I ran into the same problem, and have been pointed to this 
> thread. Maybe you are interested in my solution. It's ugly, but I needed it 
> for a test-case, where I wanted to access 
> "@@plone_context_state/is_view_template":
> 
>     >>> from ZPublisher.HTTPRequest import HTTPRequest
>     >>> from ZPublisher.HTTPResponse import HTTPResponse
>     >>> from Products.PloneTestCase import PloneTestCase
>     >>> import base64
>     >>> user_id = PloneTestCase.default_user
>     >>> password = PloneTestCase.default_password
>     >>> encoded = base64.encodestring( '%s:%s' % ( user_id, password ) )
>     >>> auth_header = 'basic %s' % encoded
>     >>> resp = HTTPResponse()
>     >>> env={'SERVER_URL':'http://nohost/plone',
>     ...          'URL':'http://nohost/plone',
>     ...          'HTTP_AUTHORIZATION': auth_header,
>     ...          'REQUEST_METHOD': 'GET',
>     ...          'steps': [],
>     ...          '_hacked_path': 0,
>     ...          '_test_counter': 0,
>     ... }
>     >>> request = HTTPRequest(stdin=None, environ=env, response=resp)
>     >>> request['PARENTS'] = [self.getPortal()]
>     >>> contextState = request.traverse("weblog/issue193/"
>     ...                  "@@plone_context_state")
>     >>> request['ACTUAL_URL'] = 'http://nohost/weblog/issue193'
>     >>> contextState.is_view_template()
>     True
>     >>> request.close()    

For this, you should possibly use zope.testbrowser (and 
Products.Five.testbrowser).

The reason you needed this particular hack was that the 
is_view_template() method looks at the url quite specifically. For most 
cases, context.restrictedTraverse('@@plone_context_state') would've worked.

Martin

-- 
Author of `Professional Plone Development`, a book for developers who
want to work with Plone. See http://martinaspeli.net/plone-book