Pytest discovery fails if something is printed to stderr

Can I get any help with pytest discovery failure?

> /usr/local/bin/python ~/.vscode-server/extensions/ms-python.python-2022.0.1786462952/pythonFiles/testing_tools/run_adapter.py discover pytest -- --rootdir . -s --cache-clear
cwd: .
[ERROR 2022-1-3 23:36:9.283]: Error discovering pytest tests:
 [r [Error]: Graceful shutdown completed in 0.000 seconds.

	at ChildProcess.<anonymous> (/root/.vscode-server/extensions/ms-python.python-2022.0.1786462952/out/client/extension.js:32:39235)
	at Object.onceWrapper (events.js:422:26)
	at ChildProcess.emit (events.js:315:20)
	at maybeClose (internal/child_process.js:1048:16)
	at Process.ChildProcess._handle.onexit (internal/child_process.js:288:5)]

Tried many different options with “python.testing.cwd” and “python.testing.pytestArgs” but without luck.

I used unit tests in the past and they work fine in VS Code.

Also I use VS Code with “Remote Container” and work inside the Docker container and run tests inside it.

Hope that you can solve this issue soon, because with pytest it doesn’t work for me. And I have no clear vision why. Thanks.

[calebho]

Getting a similar error, however it seems like it’s because the environment location is messed up

> conda run -n onedevex-dev --no-capture-output python ~/.vscode-server/extensions/ms-python.python-2022.0.1786462952/pythonFiles/get_output_via_markers.py ~/.vscode-server/extensions/ms-python.python-2022.0.1786462952/pythonFiles/testing_tools/run_adapter.py discover pytest -- --rootdir . -s --cache-clear .
cwd: .
[ERROR 2022-1-4 19:17:3.378]: Error discovering pytest tests:
 [r [Error]: 
EnvironmentLocationNotFound: Not a conda environment: /private/home/calebh/miniconda3/envs/onedevex-dev/envs/onedevex-dev


	at ChildProcess.<anonymous> (/private/home/calebh/.vscode-server/extensions/ms-python.python-2022.0.1786462952/out/client/extension.js:32:39235)
	at Object.onceWrapper (events.js:422:26)
	at ChildProcess.emit (events.js:315:20)
	at maybeClose (internal/child_process.js:1048:16)
	at Process.ChildProcess._handle.onexit (internal/child_process.js:288:5)

[ianhelle]

I’m getting a very similar issue - pytest discovery not working in vscode while pytest from cmd line works fine. From the code Python output I see:

> f:\anaconda\condabin\conda.bat run -p F:\anaconda\envs\msticpy --no-capture-output python ~\.vscode\extensions\ms-python.python-2022.1.1779589815-dev\pythonFiles\get_output_via_markers.py ~\.vscode\extensions\ms-python.python-2022.1.1779589815-dev\pythonFiles\testing_tools\run_adapter.py discover pytest -- --rootdir . -s --cache-clear tests

Not sure if something in conda is able to interpret ~\.vscode\extens... as %userprofile%\.vscode\extens... (I’m running on Windows where “~” doesn’t resolve to anything).

If I try to copy that command (and replace the “~” with userprofile path), it fails as follows

(I’ve added -v flags to conda run to try to get more info):

(msticpy) E:\src\microsoft\msticpy>f:\anaconda\condabin\conda.bat run -v -v -v -p F:\anaconda\envs\msticpy --no-capture-output python %userprofile%\.vscode\extensions\ms-python.python-2022.1.1779589815-dev\pythonFiles\get_output_via_markers.py %userprofile%\.vscode\extensions\ms-python.python-2022.1.1779589815-dev\pythonFiles\testing_tools\run_adapter.py discover pytest -- --rootdir . -s --cache-clear tests 
DEBUG conda.gateways.logging:set_verbosity(231): verbosity set to 3
DEBUG conda.gateways.subprocess:subprocess_call(71): executing>> C:\WINDOWS\system32\cmd.exe /d /c F:\anaconda\envs\msticpy\.tmpzij4q0j9.bat
>>>PYTHON-EXEC-OUTPUT
usage: C:\Users\Ian\.vscode\extensions\ms-python.python-2022.1.1779589815-dev\pythonFiles\testing_tools\run_adapter.py [-h] {discover} ...
C:\Users\Ian\.vscode\extensions\ms-python.python-2022.1.1779589815-dev\pythonFiles\testing_tools\run_adapter.py: error: argument cmd: invalid choice: 'C:\\Users\\Ian\\.vscode\\extensions\\ms-python.python-2022.1.1779589815-dev\\pythonFiles\\testing_tools\\run_adapter.py' (choose from 'discover')
TRACE conda.gateways.subprocess:subprocess_call(108): $ C:\WINDOWS\system32\cmd.exe /d /c F:\anaconda\envs\msticpy\.tmpzij4q0j9.bat
==> cwd: E:\src\microsoft\msticpy <==
==> exit code: 2 <==
==> stdout <==
None
==> stderr <==
None

ERROR conda.cli.main_run:execute(33): Subprocess for 'conda run ['python', 'C:\\Users\\Ian\\.vscode\\extensions\\ms-python.python-2022.1.1779589815-dev\\pythonFiles\\get_output_via_markers.py', 'C:\\Users\\Ian\\.vscode\\extensions\\ms-python.python-2022.1.1779589815-dev\\pythonFiles\\testing_tools\\run_adapter.py', 'discover', 'pytest', '--', '--rootdir', '.', '-s', '--cache-clear', 'tests']' command failed.  (See above for error)
TRACE conda.gateways.disk.delete:rm_rf(165): rm_rf F:\anaconda\envs\msticpy\.tmpzij4q0j9.bat

I also tried removing the get_output_via_markers.py component of the command - still no success. But I noticed that it seemed to be trying to execute pytest from the conda base environment rather than the current conda env.

(msticpy) E:\src\microsoft\msticpy>f:\anaconda\condabin\conda.bat run -v -v -v -p F:\anaconda\envs\msticpy --no-capture-output python %userprofile%\.vscode\extensions\ms-python.python-2022.1.1779589815-dev\pythonFiles\testing_tools\run_adapter.py discover pytest -- --rootdir . -s --cache-clear tests
DEBUG conda.gateways.logging:set_verbosity(231): verbosity set to 3
DEBUG conda.gateways.subprocess:subprocess_call(71): executing>> C:\WINDOWS\system32\cmd.exe /d /c F:\anaconda\envs\msticpy\.tmp39rluiwl.bat
equivalent command: f:\anaconda\python.exe -m pytest --collect-only --rootdir . -s --cache-clear tests
TRACE conda.gateways.subprocess:subprocess_call(108): $ C:\WINDOWS\system32\cmd.exe /d /c F:\anaconda\envs\msticpy\.tmp39rluiwl.bat
==> cwd: E:\src\microsoft\msticpy <==
==> exit code: 120 <==
==> stdout <==
None
==> stderr <==
None

ERROR conda.cli.main_run:execute(33): Subprocess for 'conda run ['python', 'C:\\Users\\Ian\\.vscode\\extensions\\ms-python.python-2022.1.1779589815-dev\\pythonFiles\\testing_tools\\run_adapter.py', 'discover', 'pytest', '--', '--rootdir', '.', '-s', '--cache-clear', 'tests']' command failed.  (See above for error)
TRACE conda.gateways.disk.delete:rm_rf(165): rm_rf F:\anaconda\envs\msticpy\.tmp39rluiwl.bat

This is the line I’m referring to - although not sure if this is a anything to do with the problem - it should be f:\anaconda\envs\msticpy\python.exe

equivalent command: f:\anaconda\python.exe -m pytest --collect-only --rootdir . -s --cache-clear tests

The result is the same with or without the -v flags.