Cannot run pytest

[alessio-izzo]

Hi, I recently had an issue running any test with pytest where the env variables where set by an .env file. This is the error message given by pycharm:

INTERNALERROR> self.ensure_test_start_reported(self.format_test_id(nodeid, location), test_name)
INTERNALERROR> File "/Applications/PyCharm CE.app/Contents/helpers/pycharm/teamcity/pytest_plugin.py", line 217, in ensure_test_start_reported
INTERNALERROR> self.teamcity.testStarted(test_id, flowId=test_id, captureStandardOutput=capture_standard_output, metainfo=metainfo)
INTERNALERROR> File "/Applications/PyCharm CE.app/Contents/helpers/pycharm/_jb_runner_tools.py", line 177, in testStarted
INTERNALERROR> commands = _TREE_MANAGER_HOLDER.manager.level_opened(self._test_to_list(testName), _write_start_message)
INTERNALERROR> File "/Applications/PyCharm CE.app/Contents/helpers/pycharm/_jb_runner_tools.py", line 50, in manager
INTERNALERROR> self._fill_manager()
INTERNALERROR> File "/Applications/PyCharm CE.app/Contents/helpers/pycharm/_jb_runner_tools.py", line 58, in _fill_manager
INTERNALERROR> from _jb_serial_tree_manager import SerialTreeManager
INTERNALERROR> ImportError: No module named _jb_serial_tree_manager

========================= no tests ran in 2.81 seconds =========================

Process finished with exit code 0

Empty suite

These are my settings:
PyCharm 2019.1.3 (Community Edition)
Build #PC-191.7479.30, built on May 29, 2019
JRE: 11.0.2+9-b159.60 x86_64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
macOS 10.14.5
The EnvFile version is 3.2.0
If I uncheck the use of the .env file, the tests run correctly.

[ashald]

I don't think it's related to the plugin - maybe some of the env vars you set break it?

[alessio-izzo]

Yes. I found out that the problem occurs when setting the PYTHONPATH variable. If I set PYTHONPATH into the file, the error is raised.

[ashald]

Glad you was able to figure it out! 😊

[alessio-izzo]

But there is a right way to set PYTHONPATH into the .env file? I mean, have you ever tried setting the pythonpath variable? If I set it in the usual way, I don't have problems.

[ashald]

You'd want to add a value to it rather than overwrite it altogether (as PyCharm manipulates it inject its helpers). For instance, if there is a dir src within your project that you want to add you can do it like this:

PYTHONPATH=src:${PYTHONPATH}

Also, don't forget to enable env var substitution as seen below:

P.S.: Please note that env var substitution is not a standard feature of env file format and is unlikely to work with anything else besides EnvFile plugin.