Re: Test fails when run in whole test suite - but not stand-alone?

I have no immediate clue.

I know that, using nosetest, I can add -s and -v to the command line, making it possible to drive pdb from the test, using:

    import pdb;pdb.set_trace()

inserted in the code to get into pdb at the relevant point(s).

Evan if you're not running under nosetest, there may be an equivalent to -s -v .

Clearly something interesting is going on.  If the framework uses a new process for the second test, then the import would actually happen twice, but the environment should be pristine, unless you have left crud in a file or database that is written during the test.

If the same process is used, the second import doesn't actually import, but just gives you a reference to the already loaded module (at least that's the way it is in python 2.x, where I still live).

I would start with a set_trace() at the top of the imported module, to see if it is reached before the failure.  If it is, you can single step along in hope of insight.

On Sat, Jun 25, 2016 at 5:17 AM, Derek <gamesbook@gmail.com> wrote:

Hi Adam

I have narrowed the issue right down.  As soon as I have even *one* other test that imports *anything* from the app's admin file, the test crashes. So for example, if the test sequence is group of test files - one of which is my one in the OP and one which contains:

import unittest

from trees.admin import AnyModelAdmin

class TestDummy(unittest.TestCase):

    def setUp(self):

        pass

    def test_dummy(self):

        pass

    def tearDown(self):

        pass

Then I get errors.  Do you know why an import statement would interfere with a test?

Thanks,

Derek

On Thursday, 2 June 2016 21:47:00 UTC+2, Adam wrote:

When I've had that happen before, it's because some previous test changed something (like a setting value or the site domain) that influenced the test that failed. To narrow it down, I would run all the tests up to and including the failed one. That should fail, then I start taking out half the tests before. If the test still fails, I keep cutting in half until I can determine which previous test is causing issues. If, after cutting out tests, the problem test passes, then I need to put back in what I took out since it was one of those.

Once I figure out which previous test it was, I can start removing the individual tests to finally get to the code causing the problem. Usually, it's a case that a test changed something and I just have to add in the teardown function to restore the state of whatever was changed.

On Thu, 2016-06-02 at 21:33 +0200, Derek wrote:

I have a test that is failing when the file it is in is run as part of all the other test files by the test runner.

If I just run only the file that contains this test -  then it passes.

(pass/fail refers to the very last assert in the code below.)

I'd appreciate any ideas or insights from anyone who can spot an obvious mistake - or suggest some options to explore.

Thanks

Derek

# THIS IS AN EXTRACT OF RELEVANT CODE (not all of it...)

from django.contrib.messages.storage.fallback import FallbackStorage

from django.core.urlresolvers import reverse

from django.test import TestCase, Client

# ... various app-related imports ...

class MockRequest(object):

    """No code needed."""

    pass

REQUEST = MockRequest()

# see: https://stackoverflow.com/queI stions/11938164/why-dont-my-django-\

#      unittests-know-that-messagemiddleware-is-installed

setattr(REQUEST, 'session', 'session')

MESSAGES = FallbackStorage(REQUEST)

setattr(REQUEST, '_messages', MESSAGES)

setup_test_environment()

class PersonAdminTest(TestCase):

    def setUp(self):

        self.user, password = utils.user_factory(model=None)

        self.client = Client()

        login_status = self.client.login(username=self.user.email, password=password)

        self.assertEqual(login_status, True)

    def test_action_persons_make_unreal(self):

        try:

            change_url = reverse('admin:persons_realpersons_changelist')

        except NoReverseMatch:

            change_url = '/admin/persons/realpersons/'

            sys.stderr.write('\n   WARNING: Unable to reverse URL! ... ')

        response = self.client.get(change_url)

        self.assertEqual(response.status_code, 200)

--
You received this message because you are subscribed to the Google Groups "Django users" group.
To unsubscribe from this group and stop receiving emails from it, send an email to django-users...@googlegroups.com.
To post to this group, send email to django...@googlegroups.com.
Visit this group at https://groups.google.com/group/django-users.
To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/CAF1Wu3MoGgm_dSToObDX9gH7GQJ%3DTZzGLV7RPOiZk4kvV-_Nbg%40mail.gmail.com.
For more options, visit https://groups.google.com/d/optout.

--   Adam (ad...@csh.rit.edu)    

--
You received this message because you are subscribed to the Google Groups "Django users" group.
To unsubscribe from this group and stop receiving emails from it, send an email to django-users+unsubscribe@googlegroups.com.
To post to this group, send email to django-users@googlegroups.com.
Visit this group at https://groups.google.com/group/django-users.
To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/cbebca39-4446-4ffa-93aa-c058861bdc22%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

--
You received this message because you are subscribed to the Google Groups "Django users" group.
To unsubscribe from this group and stop receiving emails from it, send an email to django-users+unsubscribe@googlegroups.com.
To post to this group, send email to django-users@googlegroups.com.
Visit this group at https://groups.google.com/group/django-users.
To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/CAB%2BAj0toF59uq2H_2Wtk530xnc%2BJROJcdHsMJgc7fRyWUyMmDQ%40mail.gmail.com.
For more options, visit https://groups.google.com/d/optout.