pytest's tests fail: ValueError: Plugin already registered (module 'tests.conftest') (caused by virtualenv's local symlinks) #102
Description
When trying to run the pytest_django tests, py.test fails/aborts:
E ValueError: Plugin already registered: venv/src/pytest_django/tests/conftest.py=<module 'tests.conftest' from 'venv/src/pytest_django/tests/conftest.py'>
I have even tried it in a basic Docker image to make sure it's nothing specific to my setup.
I am using DJANGO_SETTINGS_MODULE=tests.settings_sqlite and pytest_django master.
Since it worked before, I am really wondering what is wrong here.
I have also tried pytest-dev (-e hg+https://bitbucket.org/hpk42/pytest@177f44412427b5060724fafe0263b35bddd91183#egg=pytest-dev).
% bin/py.test
========================================================================== test session starts ===========================================================================
platform linux2 -- Python 2.7.5 -- py-1.4.20 -- pytest-2.6.0.dev1
plugins: django, xdist
collected 0 items / 1 errors
================================================================================= ERRORS =================================================================================
___________________________________________________________________________ ERROR collecting . ___________________________________________________________________________
local/lib/python2.7/site-packages/py/_path/common.py:327: in visit
> for x in Visitor(fil, rec, ignore, bf, sort).gen(self):
local/lib/python2.7/site-packages/py/_path/common.py:373: in gen
> for p in self.gen(subdir):
local/lib/python2.7/site-packages/py/_path/common.py:363: in gen
> if p.check(dir=1) and (rec is None or rec(p))])
…/pytest/_pytest/main.py:620: in _recurse
> ihook.pytest_collect_directory(path=path, parent=self)
…/pytest/_pytest/main.py:162: in call_matching_hooks
> plugins = self.config._getmatchingplugins(self.fspath)
…/pytest/_pytest/config.py:680: in _getmatchingplugins
> plugins += self._conftest.getconftestmodules(fspath)
…/pytest/_pytest/config.py:513: in getconftestmodules
> mod = self.importconftest(conftestpath)
…/pytest/_pytest/config.py:546: in importconftest
> self._onimport(mod)
…/pytest/_pytest/config.py:666: in _onimportconftest
> self.pluginmanager.consider_conftest(conftestmodule)
…/pytest/_pytest/core.py:199: in consider_conftest
> if self.register(conftestmodule, name=conftestmodule.__file__):
…/pytest/_pytest/core.py:94: in register
> name, plugin, self._name2plugin))
E ValueError: Plugin already registered: venv/src/pytest_django/tests/conftest.py=<module 'tests.conftest' from 'venv/src/pytest_django/tests/conftest.py'>
E {'helpconfig': <module '_pytest.helpconfig' from '…/pytest/_pytest/helpconfig.pyc'>, 'pytestconfig': <_pytest.config.Config object at 0x2af56c1c6b90>, 'runner': <module '_pytest.runner' from '…/pytest/_pytest/runner.pyc'>, 'unittest': <module '_pytest.unittest' from '…/pytest/_pytest/unittest.pyc'>, 'xdist': <module 'xdist.plugin' from 'venv/src/pytest_django/local/lib/python2.7/site-packages/xdist/plugin.pyc'>, 'pastebin': <module '_pytest.pastebin' from '…/pytest/_pytest/pastebin.pyc'>, 'skipping': <module '_pytest.skipping' from '…/pytest/_pytest/skipping.pyc'>, 'genscript': <module '_pytest.genscript' from '…/pytest/_pytest/genscript.pyc'>, 'session': <Session 'pytest_django'>, 'tmpdir': <module '_pytest.tmpdir' from '…/pytest/_pytest/tmpdir.pyc'>, 'capture': <module '_pytest.capture' from '…/pytest/_pytest/capture.pyc'>, 'terminalreporter': <_pytest.terminal.TerminalReporter instance at 0x24beb90>, 'assertion': <module '_pytest.assertion' from '…/pytest/_pytest/assertion/__init__.pyc'>, 'mark': <module '_pytest.mark' from '…/pytest/_pytest/mark.pyc'>, 'terminal': <module '_pytest.terminal' from '…/pytest/_pytest/terminal.pyc'>, 'main': <module '_pytest.main' from '…/pytest/_pytest/main.pyc'>, 'nose': <module '_pytest.nose' from '…/pytest/_pytest/nose.pyc'>, '47233542048400': <_pytest.config.PytestPluginManager object at 0x2af56a7eca90>, 'python': <module '_pytest.python' from '…/pytest/_pytest/python.pyc'>, 'recwarn': <module '_pytest.recwarn' from '…/pytest/_pytest/recwarn.pyc'>, 'funcmanage': <_pytest.python.FixtureManager instance at 0x2350c68>, 'monkeypatch': <module '_pytest.monkeypatch' from '…/pytest/_pytest/monkeypatch.pyc'>, 'venv/src/pytest_django/tests/conftest.py': <module 'tests.conftest' from 'venv/src/pytest_django/tests/conftest.py'>, 'resultlog': <module '_pytest.resultlog' from '…/pytest/_pytest/resultlog.pyc'>, 'capturemanager': <_pytest.capture.CaptureManager instance at 0x1d314d0>, 'django': <module 'pytest_django.plugin' from 'venv/src/pytest_django/pytest_django/plugin.pyc'>, 'junitxml': <module '_pytest.junitxml' from '…/pytest/_pytest/junitxml.pyc'>, 'doctest': <module '_pytest.doctest' from '…/pytest/_pytest/doctest.pyc'>, 'pytester': <module '_pytest.pytester' from '…/pytest/_pytest/pytester.pyc'>, 'pdb': <module '_pytest.pdb' from '…/pytest/_pytest/pdb.pyc'>}
======================================================================== 1 error in 0.12 seconds =========================================================================