[TIP] Nose Importer

[Alfredo Deza]

On Wed, Apr 7, 2010 at 5:46 PM, Mark Roddy <markroddy at gmail.com> wrote:

> On Wed, Apr 7, 2010 at 5:11 PM, Alfredo Deza <alfredodeza at gmail.com>
> wrote:
> > Hi,
> > I am having some issues with the Nose importer.
> > My project layout is set as follows:
> > /project
> > /project/lib
> > /project/tests
> > When I run 'nosetests -v' in /project everything runs OK (tests import
> from
> > within 'lib').
> > But when I am within /project/tests 'nosetests -v' fails with an
> ImportError
> > exception saying it cannot import the
> > files from lib on only *one* of the test files.
> > However, if I take the same test file that is throwing exceptions and run
> it
> > against nose, it completes the tests successfully:
> > 'nosetests -v test_permissions.py'
> > It also works fine when calling it via python:
> > 'python test_permissions.py'
> > The one file that test_permissions.py is trying to import but is failing
> is:
> > 'permissions', and it does so by:
> > sys.path.append('../')
> > from lib import hg, permissions, upgrade
> > I am not sure why it would be able to import 'hg' and 'database', but
> fail
> > to import 'permissions', and only when it runs all tests within the tests
> > directory.
> > Here is a copy of one of the exceptions:
> > ======================================================================
> > ERROR: Failure: ImportError (cannot import name permissions)
> > ----------------------------------------------------------------------
> > Traceback (most recent call last):
> >   File "/usr/local/lib/python2.6/dist-packages/nose/loader.py", line 382,
> in
> > loadTestsFromName
> >     addr.filename, addr.module)
> >   File "/usr/local/lib/python2.6/dist-packages/nose/importer.py", line
> 39,
> > in importFromPath
> >     return self.importFromDir(dir_path, fqname)
> >   File "/usr/local/lib/python2.6/dist-packages/nose/importer.py", line
> 86,
> > in importFromDir
> >     mod = load_module(part_fqname, fh, filename, desc)
> >   File "/home/alfredo/pacha/tests/test_permissions.py", line 10, in
> <module>
> >     from lib import hg, permissions, database
> > ImportError: cannot import name permissions
> >
> >
> > Maybe I need to import differently? But then again... *why* it works when
> I
> > call it directly? I basically want
> > to be able to run from either /project or /project/tests with the same
> > results.
> >
> >
> > --
> > Alfredo Deza
> >
> >
> > _______________________________________________
> > testing-in-python mailing list
> > testing-in-python at lists.idyll.org
> > http://lists.idyll.org/listinfo/testing-in-python
> >
> >
>
> One possibility for why you can import 'hg' from lib but not
> 'permissions' is that 'hg' module that gets imported is not actually
> the one you expect (when running from the 'tests' directory).  I ran
> into this the other day when I had my path messed up, and I could
> import one module from a package but not another.  Turns out the one I
> could import was under site-packages as I had an older version
> installed which did not have the module that the import failed on.
>

This is not the case, since 'hg' is not able to import at all from anywhere
on the system.
The actual Mercurial package is called 'mercurial'.


> You can check that the 'hg' module which gets imported is actually the
> module you expect by looking at it's __file__ attribute.
>

Yep, this verified that it is actually the one I have.

>
> -Mark
>


I guess my solution will be to move the tests directory out of the standard
location (root level) inside 'lib'



-- 
Alfredo Deza
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