tests fails on admin but works with default test runner

[karimone]

Hello, I already posted this error on stackexchange, but maybe is a bug.

I'm working on a Django project and we are doing some refactoring. I "promoted" an admin.py module to an admin package and I load all the splitted modules in the admin/__init__.py

Everything works fine. The admin works as expected, but the tests fail if I use nose as a TestRunner.

If I use the default tests runner everything works.

The list of some of the packages I use:

Django==1.7.7 (I can't upgrade right now)
django-nose==1.4.4
nose==1.3.7
coverage==4.2

Nose is runned with the following options:

NOSE_ARGS = [
    '--cover-html',
    '--cover-html-dir=htmlcov',
    '--cover-package=app',
    '--cover-erase',
    '--nologcapture',
]

Above the error:

======================================================================
ERROR: Failure: NotRegistered (The model CrontabSchedule is not registered)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/..../local/lib/python2.7/site-packages/nose/loader.py", line 418, in loadTestsFromName
    addr.filename, addr.module)
  File "/..../local/lib/python2.7/site-packages/nose/importer.py", line 47, in importFromPath
    return self.importFromDir(dir_path, fqname)
  File "/..../local/lib/python2.7/site-packages/nose/importer.py", line 94, in importFromDir
    mod = load_module(part_fqname, fh, filename, desc)
  File "/..../application/app/core/admin/__init__.py", line 6, in <module>
    from .unregister import *
  File "/..../application/app/core/admin/unregister.py", line 12, in <module>
    unregister(djcelery_models.CrontabSchedule)
  File "/..../envs/echeck/local/lib/python2.7/site-packages/django/contrib/admin/sites.py", line 116, in unregister
    raise NotRegistered('The model %s is not registered' % model.__name__)
NotRegistered: The model CrontabSchedule is not registered

----------------------------------------------------------------------
Ran 128 tests in 62.824s

Any idea?

[jwhitlock]

django-nose 1.4.4 does not support Django 1.7 or earlier. Please try with version 1.4.3.

[karimone]

Thanks, I downgraded, but nothing. still the same error.

[jwhitlock]

It appears that nose imports your modules in a different order than your app does, and the CrontabSchedule admin class is not loaded by the time you attempt to unregister it. This may very well be a side-effect of splitting admin.py into modules, and how nose scans for tests. Or, you may have some stray .pyc files that are confusing the issue.

Is this an open-source project, where I can duplicate the issue? Or, can you create a test project that demonstrates it?

[karimone]

First of all, thank you for your support.

The project is not opensource, unfortunately. I tried to comments some of the loading on the init.py but nothing. I clean all the .pyc before every tests and still nothing.

At the moment the most reasonable thing to do is to revert the admin/ to admin.py it could be a problem with the django 1.7 branch, but I don't know how to proceed to debug the way nose tests the modules in my app.

I think is nose, because with the Django test runner everything works.

[karimone]

I restored the old admin.py file and I get 127 tests passed.

I created again the admin/ I copied inside the folder the file admin.py and in __init__.py I added the line from admin import *

Nose fail with 128 tests. Why nose run 128 tests when I have only 127? Any idea?

[jwhitlock]

I believe the NotRegistered error is summarized by nose as a failed test, and that's where the "extra" test is coming from.

A few things to try:

• Adjust the order of INSTALLED_APPS in settings, changing the relative order of django_nose, djcelery, and your application
• Wrap unregister in a try-except block, something like:

try:
   unregister(djcelery_models.CrontabSchedule)
except NotRegistered:
  pass

This won't fix the problem (and you'll have to figure out where to import NotRegistered from), but may uncover the next issue.