Local test failure: ModuleNotFoundError: No module named 'helper'

[blueyed]

I am seeing the following test failure locally, also when using tox, even from
a fresh git clone:

platform linux -- Python 3.7.2, pytest-4.3.0, py-1.8.0, pluggy-0.9.0
rootdir: …/Vcs/pytest-cov, inifile: setup.cfg
plugins: forked-1.0.2, cov-2.6.1
collected 113 items

tests/test_pytest_cov.py F

=========================================================================================== FAILURES ===========================================================================================
____________________________________________________________________________________ test_central[branch2x] ____________________________________________________________________________________
…/Vcs/pytest-cov/tests/test_pytest_cov.py:187: in test_central
    '*10 passed*'
E   Failed: nomatch: '*- coverage: platform *, python * -*'
E       and: '============================= test session starts =============================='
E       and: 'platform linux -- Python 3.7.2, pytest-4.3.0, py-1.8.0, pluggy-0.9.0 -- …/Vcs/pytest-cov/.venv/bin/python'
E       and: 'cachedir: .pytest_cache'
E       and: 'rootdir: /tmp/pytest-of-user/pytest-647/test_central0, inifile:'
E       and: 'plugins: forked-1.0.2, cov-2.6.1'
E       and: 'collecting ... collected 0 items / 1 errors'
E       and: ''
E       and: '==================================== ERRORS ===================================='
E       and: '_______________________ ERROR collecting test_central.py _______________________'
E       and: "ImportError while importing test module '/tmp/pytest-of-user/pytest-647/test_central0/test_central.py'."
E       and: 'Hint: make sure your test modules/packages have valid Python names.'
E       and: 'Traceback:'
E       and: 'test_central.py:1: in <module>'
E       and: '    import sys, helper'
E       and: "E   ModuleNotFoundError: No module named 'helper'"
E       and: ''
E   fnmatch: '*- coverage: platform *, python * -*'
E      with: '----------- coverage: platform linux, python 3.7.2-final-0 -----------'
E   nomatch: 'test_central* 9 * 85% *'
E       and: 'Name              Stmts   Miss Branch BrPart  Cover   Missing'
E       and: '-------------------------------------------------------------'
E       and: 'test_central.py       9      8      4      0     8%   3-11'
E       and: ''
E       and: '!!!!!!!!!!!!!!!!!!! Interrupted: 1 errors during collection !!!!!!!!!!!!!!!!!!!!'
E       and: '=========================== 1 error in 0.05 seconds ============================'
E   remains unmatched: 'test_central* 9 * 85% *'
------------------------------------------------------------------------------------- Captured stdout call -------------------------------------------------------------------------------------
running: …/Vcs/pytest-cov/.venv/bin/python -mpytest --basetemp=/tmp/pytest-of-user/pytest-647/test_central0/runpytest-0 -v --cov=/tmp/pytest-of-user/pytest-647/test_central0 --cov-report=term-missing /tmp/pytest-of-user/pytest-647/test_central0/test_central.py --cov-branch --basetemp=/tmp/pytest-of-user/pytest-647/basetemp
     in: /tmp/pytest-of-user/pytest-647/test_central0
============================= test session starts ==============================
platform linux -- Python 3.7.2, pytest-4.3.0, py-1.8.0, pluggy-0.9.0 -- …/Vcs/pytest-cov/.venv/bin/python
cachedir: .pytest_cache
rootdir: /tmp/pytest-of-user/pytest-647/test_central0, inifile:
plugins: forked-1.0.2, cov-2.6.1
collecting ... collected 0 items / 1 errors

==================================== ERRORS ====================================
_______________________ ERROR collecting test_central.py _______________________
ImportError while importing test module '/tmp/pytest-of-user/pytest-647/test_central0/test_central.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
test_central.py:1: in <module>
    import sys, helper
E   ModuleNotFoundError: No module named 'helper'

----------- coverage: platform linux, python 3.7.2-final-0 -----------
Name              Stmts   Miss Branch BrPart  Cover   Missing
-------------------------------------------------------------
test_central.py       9      8      4      0     8%   3-11

!!!!!!!!!!!!!!!!!!! Interrupted: 1 errors during collection !!!!!!!!!!!!!!!!!!!!
=========================== 1 error in 0.05 seconds ============================
=================================================================================== short test summary info ====================================================================================
FAILED tests/test_pytest_cov.py::test_central[branch2x]

[blueyed]

That's due to the missing PYTHONPATH={toxinidir}/tests..

[ionelmc]

@blueyed I'm not sure if @271 actually fixes this, maybe you accidentally removed the PYTHONPATH extension from tox.ini?

[blueyed]

@ionelmc
I was using it without tox apparently.