Django Testing Error

Type: Bug

I am trying to use the Django testing feature implemented in August, but I am encountering difficulties. I am using a Conda environment inside a dev container that utilizes this image: continuumio/miniconda3:latest. However, when I try to run the tests, I get the following errors:

2024-12-24 17:49:50.742 [info] Discover tests for workspace name: EDDAI-EliteDangerousApiInterface - uri: /workspaces/EDDAI-EliteDangerousApiInterface
2024-12-24 17:49:50.742 [info] Running discovery for unittest using the new test adapter.
2024-12-24 17:49:50.756 [info] > conda run -n base --no-capture-output python ~/.vscode-server/extensions/ms-python.python-2024.22.1-linux-x64/python_files/get_output_via_markers.py ~/.vscode-server/extensions/ms-python.python-2024.22.1-linux-x64/python_files/printEnvVariables.py
2024-12-24 17:49:50.756 [info] shell: bash
2024-12-24 17:49:51.896 [info] Discovering unittest tests for workspace /workspaces/EDDAI-EliteDangerousApiInterface with arguments: /root/.vscode-server/extensions/ms-python.python-2024.22.1-linux-x64/python_files/unittestadapter/discovery.py,--udiscovery,-p,test.py

2024-12-24 17:49:51.896 [info] > conda run -n base --no-capture-output python ~/.vscode-server/extensions/ms-python.python-2024.22.1-linux-x64/python_files/get_output_via_markers.py ~/.vscode-server/extensions/ms-python.python-2024.22.1-linux-x64/python_files/unittestadapter/discovery.py --udiscovery -p test.py
2024-12-24 17:49:51.896 [info] cwd: .
2024-12-24 17:49:52.914 [info] >>>PYTHON-EXEC-OUTPUT

2024-12-24 17:49:52.947 [info] MANAGE_PY_PATH is set, running Django discovery with path to manage.py as: $/workspaces/EDDAI-EliteDangerousApiInterface/eddai_EliteDangerousApiInterface/manage.py

2024-12-24 17:49:52.951 [info] Running Django tests with command: ['/opt/conda/bin/python', '/workspaces/EDDAI-EliteDangerousApiInterface/eddai_EliteDangerousApiInterface/manage.py', 'test', '--testrunner=django_test_runner.CustomDiscoveryTestRunner', '-p', 'test.py']

2024-12-24 17:49:57.044 [error] Test Discovery named pipe /tmp/user/0/python-test-discovery-a8be1522eb245c648034 error: TypeError: Cannot read properties of null (reading 'path')
at e (/root/.vscode-server/extensions/ms-python.python-2024.22.1-linux-x64/out/client/extension.js:2:963511)
at t.PythonResultResolver._resolveDiscovery (/root/.vscode-server/extensions/ms-python.python-2024.22.1-linux-x64/out/client/extension.js:2:942532)
at t.PythonResultResolver.resolveDiscovery (/root/.vscode-server/extensions/ms-python.python-2024.22.1-linux-x64/out/client/extension.js:2:941616)
at /root/.vscode-server/extensions/ms-python.python-2024.22.1-linux-x64/out/client/extension.js:2:1011606
at b.callback (/root/.vscode-server/extensions/ms-python.python-2024.22.1-linux-x64/out/client/extension.js:2:962221)
at Object.thunk (/root/.vscode-server/extensions/ms-python.python-2024.22.1-linux-x64/out/client/extension.js:2:2057316)
2024-12-24 17:49:57.186 [error]

2024-12-24 17:49:57.186 [info] Found 0 test(s).

<<<PYTHON-EXEC-OUTPUT

I don't think this is an issue caused by the dev container. Below, I am also providing the environment.yml file from Conda with my dependencies to help you understand the problem:

`channels:

conda-forge
defaults
dependencies:
geos=3.12.2
gdal=3.9.1
proj=9.4.1
python=3.11.9
psycopg2=2.9.9
libarchive=3.7.7
pip:
- celery==5.4.0
- django==5.1.0
- django-filter==24.2
- djangorestframework==3.15.1
- djangorestframework-gis==1.1
- gevent==24.2.1
- redis==5.0.4
- pyzmq==26.0.3
- psycopg==3.2.1

Lastly, I am including the Docker file that generates my dev container for completeness.

FROM continuumio/miniconda3:latest

COPY environment.yml* .devcontainer/noop.txt /tmp/conda-tmp/
RUN if [ -f "/tmp/conda-tmp/environment.yml" ]; then umask 0002 && /opt/conda/bin/conda env update -n base -f /tmp/conda-tmp/environment.yml; fi
&& rm -rf /tmp/conda-tmp

Extension version: 2024.22.1
VS Code version: Code 1.96.2 (fabdb6a30b49f79a7aba0f2ad9df9b399473380f, 2024-12-19T10:22:47.216Z)
OS version: Windows_NT x64 10.0.26100
Modes:
Remote OS version: Linux x64 5.15.133.1-microsoft-standard-WSL2

Python version (& distribution if applicable, e.g. Anaconda): 3.11.9
Type of virtual environment used (e.g. conda, venv, virtualenv, etc.): Conda
Value of the python.languageServer setting: Default

User Settings


languageServer: "Pylance"

testing
• unittestArgs: "<placeholder>"
• unittestEnabled: true

Installed Extensions

Extension Name	Extension Id	Version
Bracket Pair Colorization Toggler	dzhavat.bracket-pair-toggler	0.0.3
Git Graph	mhutchie.git-graph	1.30.0
GitHub Copilot	GitHub.copilot	1.254.0
GitHub Copilot Chat	GitHub.copilot-chat	0.23.2
GitHub Pull Requests	GitHub.vscode-pull-request-github	0.102.0
Italian Language Pack for Visual Studio Code	MS-CEINTL.vscode-language-pack-it	1.96.2024121109
JavaScript Debugger	ms-vscode.js-debug	1.96.0
Prettier - Code formatter	esbenp.prettier-vscode	11.0.0
Pylance	ms-python.vscode-pylance	2024.12.1
Python	ms-python.python	2024.22.1
Python Debugger	ms-python.debugpy	2024.14.0
snappify	snappify.snappify	1.0.2
Table Visualizer for JavaScript Profiles	ms-vscode.vscode-js-profile-table	1.0.10

System Info

Item	Value
CPUs	12th Gen Intel(R) Core(TM) i7-1260P (16 x 2496)
GPU Status	2d_canvas: enabled canvas_oop_rasterization: enabled_on direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_graphite: disabled_off video_decode: enabled video_encode: enabled vulkan: disabled_off webgl: enabled webgl2: enabled webgpu: enabled webnn: disabled_off
Load (avg)	undefined
Memory (System)	31.70GB (10.79GB free)
Process Argv	--folder-uri file:///c%3A/Users/fabio/Documents/GitHub/EDDAI-EliteDangerousApiInterface --crash-reporter-id 7a609e3a-ffca-4e82-8085-4b26c3179ade
Screen Reader	no
VM	0%

Item	Value
Remote	Contenitore di sviluppo: eddia-devcontainer @ desktop-linux
OS	Linux x64 5.15.133.1-microsoft-standard-WSL2
CPUs	12th Gen Intel(R) Core(TM) i7-1260P (16 x 0)
Memory (System)	15.47GB (12.25GB free)
VM	0%

A/B Experiments

vsliv368:30146709
vspor879:30202332
vspor708:30202333
vspor363:30204092
vscod805cf:30301675
binariesv615:30325510
vsaa593cf:30376535
py29gd2263:31024239
vscaac:30438847
c4g48928:30535728
azure-dev_surveyone:30548225
962ge761:30959799
pythonnoceb:30805159
pythonmypyd1:30879173
2e7ec940:31000449
pythontbext0:30879054
cppperfnew:31000557
dsvsc020:30976470
pythonait:31006305
dsvsc021:30996838
dvdeprecation:31068756
dwnewjupyter:31046869
newcmakeconfigv2:31071590
nativerepl2:31139839
pythonrstrctxt:31112756
nativeloc2:31192216
cf971741:31144450
iacca1:31171482
notype1:31157159
5fd0e150:31155592
dwcopilot:31170013
stablechunks:31184530
6074i472:31201624

I also tried from my host system, a Windows machine, without using the dev container, and I get the same error only on Windows.

2024-12-24 19:08:58.483 [info] Discover tests for workspace name: EDDAI-EliteDangerousApiInterface - uri: c:\Users\fabio\Documents\GitHub\EDDAI-EliteDangerousApiInterface
2024-12-24 19:08:58.483 [info] Running discovery for unittest using the new test adapter.
2024-12-24 19:08:58.488 [info] > ~\miniconda3\Scripts\conda.exe run -p ..conda --no-capture-output python ~.vscode\extensions\ms-python.python-2024.22.1-win32-x64\python_files\get_output_via_markers.py ~/.vscode/extensions/ms-python.python-2024.22.1-win32-x64/python_files/printEnvVariables.py
2024-12-24 19:08:58.488 [info] shell: commandPrompt
2024-12-24 19:09:00.437 [info] Discovering unittest tests for workspace c:\Users\fabio\Documents\GitHub\EDDAI-EliteDangerousApiInterface with arguments: c:\Users\fabio.vscode\extensions\ms-python.python-2024.22.1-win32-x64\python_files\unittestadapter\discovery.py,--udiscovery,-p,test.py

2024-12-24 19:09:00.437 [info] > ~\miniconda3\Scripts\conda.exe run -p ..conda --no-capture-output python ~.vscode\extensions\ms-python.python-2024.22.1-win32-x64\python_files\get_output_via_markers.py ~.vscode\extensions\ms-python.python-2024.22.1-win32-x64\python_files\unittestadapter\discovery.py --udiscovery -p test.py
2024-12-24 19:09:00.437 [info] cwd: .
2024-12-24 19:09:02.290 [info] >>>PYTHON-EXEC-OUTPUT

2024-12-24 19:09:02.469 [info] MANAGE_PY_PATH is set, running Django discovery with path to manage.py as: $C:\Users\fabio\Documents\GitHub\EDDAI-EliteDangerousApiInterface\eddai_EliteDangerousApiInterface\manage.py

2024-12-24 19:09:02.469 [info] Running Django tests with command: ['c:\Users\fabio\Documents\GitHub\EDDAI-EliteDangerousApiInterface\.conda\python.exe', 'C:\Users\fabio\Documents\GitHub\EDDAI-EliteDangerousApiInterface\eddai_EliteDangerousApiInterface\manage.py', 'test', '--testrunner=django_test_runner.CustomDiscoveryTestRunner', '-p', 'test.py']

2024-12-24 19:09:04.638 [error] Test Discovery named pipe \.\pipe\python-test-discovery-c8d35517c3a59356ecbe error: TypeError: Cannot read properties of null (reading 'path')
at e (c:\Users\fabio.vscode\extensions\ms-python.python-2024.22.1-win32-x64\out\client\extension.js:2:963511)
at t.PythonResultResolver._resolveDiscovery (c:\Users\fabio.vscode\extensions\ms-python.python-2024.22.1-win32-x64\out\client\extension.js:2:942532)
at t.PythonResultResolver.resolveDiscovery (c:\Users\fabio.vscode\extensions\ms-python.python-2024.22.1-win32-x64\out\client\extension.js:2:941616)
at c:\Users\fabio.vscode\extensions\ms-python.python-2024.22.1-win32-x64\out\client\extension.js:2:1011606
at _._callback (c:\Users\fabio.vscode\extensions\ms-python.python-2024.22.1-win32-x64\out\client\extension.js:2:962221)
at b.callback (c:\Users\fabio.vscode\extensions\ms-python.python-2024.22.1-win32-x64\out\client\extension.js:2:204363)
at Object.thunk (c:\Users\fabio.vscode\extensions\ms-python.python-2024.22.1-win32-x64\out\client\extension.js:2:2057316)
2024-12-24 19:09:04.852 [error]

2024-12-24 19:09:04.853 [info] Found 0 test(s).

<<<PYTHON-EXEC-OUTPUT

The Conda environment was created from VSCode by clicking on "Create Virtual Environment" and selecting Conda.

Hi! This is very interesting, here are some of my thoughts. First, it seems you get it on both machines so it is likely not a permissions error but we see similar errors for permissions so that could be a reason. What would help is if you could test it from the command line to see if you can get a result there. First you will need to add the parent folder of the script we are using to your python path. It should be somewhere here ~/.vscode-insiders/extensions/ms-python.python-2024.22.1-darwin-arm64/python_files/unittestadapter (with different versions and maybe .vscode not .vscode-insiders).. Now run the command your logs included here Running Django tests with command: ['/opt/conda/bin/python', '/workspaces/EDDAI-EliteDangerousApiInterface/eddai_EliteDangerousApiInterface/manage.py', 'test', '--testrunner=django_test_runner.CustomDiscoveryTestRunner', '-p', 'test.py'] as a string with spaces. Let me know how that goes. Thanks!

Hi,
I’ve run the test you asked for. Below is the terminal output:

terminale.txt

As you can see, at the beginning, I looked for the directory you mentioned. Then, I added the main folder of the script, went back to the project directory, and executed the command. Let me know if I followed the steps correctly and if there’s anything else I can do to help you resolve the issue.

Thank you for your support.

i have the same problem:
PYTHONPATH seems to be set correctly, i've added print() inside manage.py

2025-04-04 21:23:58.685 [info] Discover tests for workspace name: test_project - uri: /workspace/test_project
2025-04-04 21:23:58.690 [info] Discovering unittest tests for workspace /workspace/test_project with arguments: /root/.vscode-server/extensions/ms-python.python-2025.4.0-linux-x64/python_files/unittestadapter/discovery.py,--udiscovery,-v,2

2025-04-04 21:23:58.743 [info] > /usr/local/python/current/bin/python ~/.vscode-server/extensions/ms-python.python-2025.4.0-linux-x64/python_files/unittestadapter/discovery.py --udiscovery -v 2
2025-04-04 21:23:58.743 [info] cwd: .
2025-04-04 21:23:58.785 [info] MANAGE_PY_PATH is set, running Django discovery with path to manage.py as: $./django/manage.py

2025-04-04 21:23:58.785 [info] Running Django tests with command: ['/usr/local/python/current/bin/python', './django/manage.py', 'test', '--testrunner=django_test_runner.CustomDiscoveryTestRunner', '-v', '2']

2025-04-04 21:23:59.394 [error] Test Discovery named pipe /tmp/python-test-discovery-683bf85fbd22591ff3c2 error: TypeError: Cannot read properties of null (reading 'path')
    at e (/root/.vscode-server/extensions/ms-python.python-2025.4.0-linux-x64/out/client/extension.js:2:931664)
    at t.PythonResultResolver._resolveDiscovery (/root/.vscode-server/extensions/ms-python.python-2025.4.0-linux-x64/out/client/extension.js:2:916288)
    at t.PythonResultResolver.resolveDiscovery (/root/.vscode-server/extensions/ms-python.python-2025.4.0-linux-x64/out/client/extension.js:2:915372)
    at /root/.vscode-server/extensions/ms-python.python-2025.4.0-linux-x64/out/client/extension.js:2:967569
    at b.callback (/root/.vscode-server/extensions/ms-python.python-2025.4.0-linux-x64/out/client/extension.js:2:931208)
    at Object.thunk (/root/.vscode-server/extensions/ms-python.python-2025.4.0-linux-x64/out/client/extension.js:2:1985138)
2025-04-04 21:23:59.507 [error] 
2025-04-04 21:23:59.508 [info] PYTHONPATH: /root/.vscode-server/extensions/ms-python.python-2025.4.0-linux-x64/python_files/unittestadapter
2025-04-04 21:23:59.509 [info] Using settings: test_project.settings.test
Found 0 test(s).

i've tried running from terminal directly:

test_project git:(dev) ✗ PYTHONPATH=/root/.vscode-server/extensions/ms-python.python-2025.4.0-linux-x64/python_files/unittestadapter /usr/local/python/current/bin/python django/manage.py test --testrunner=django_test_runner.CustomDiscoveryTestRunner -v 2
PYTHONPATH: /root/.vscode-server/extensions/ms-python.python-2025.4.0-linux-x64/python_files/unittestadapter
Using settings: test_project.settings.test
UNITTEST ERROR: TEST_RUN_PIPE is not set at the time of unittest trying to send data. Please confirm this environment variable is not being changed or removed as it is required for successful test discovery and execution.TEST_RUN_PIPE = None

Traceback (most recent call last):
  File "/workspace/test_project/django/manage.py", line 16, in <module>
    execute_from_command_line(sys.argv)
  File "/usr/local/python/3.12.9/lib/python3.12/site-packages/django/core/management/__init__.py", line 442, in execute_from_command_line
    utility.execute()
  File "/usr/local/python/3.12.9/lib/python3.12/site-packages/django/core/management/__init__.py", line 436, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/usr/local/python/3.12.9/lib/python3.12/site-packages/django/core/management/commands/test.py", line 24, in run_from_argv
    super().run_from_argv(argv)
  File "/usr/local/python/3.12.9/lib/python3.12/site-packages/django/core/management/base.py", line 413, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/usr/local/python/3.12.9/lib/python3.12/site-packages/django/core/management/base.py", line 459, in execute
    output = self.handle(*args, **options)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/python/3.12.9/lib/python3.12/site-packages/django/core/management/commands/test.py", line 63, in handle
    failures = test_runner.run_tests(test_labels)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/root/.vscode-server/extensions/ms-python.python-2025.4.0-linux-x64/python_files/unittestadapter/django_test_runner.py", line 46, in run_tests
    raise VSCodeUnittestError(error_msg)
pvsc_utils.VSCodeUnittestError: UNITTEST ERROR: TEST_RUN_PIPE is not set at the time of unittest trying to send data. Please confirm this environment variable is not being changed or removed as it is required for successful test discovery and execution.TEST_RUN_PIPE = None```



settings: 

```"python.experiments.optInto": ["pythonTestAdapter"],
"python.testing.promptToConfigure": false,
"python.testing.unittestArgs": ["-v", "2"],
"python.testing.pytestEnabled": false,
"python.testing.unittestEnabled": true,
"python.envFile": "${workspaceFolder}/django/.env",```

🤖 Thanks for the report and the additional reproduction. Current main now avoids the Cannot read properties of null (reading 'path') exception when Django discovery returns a null test tree, but that change does not establish whether your tests are now discovered. Could you confirm this with the current Python extension or pre-release and provide a minimal Django project plus the latest Python output-channel log if it still finds zero tests? Issues marked info-needed automatically close after 30 days without a reply.

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Django Testing Error #24657

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Django Testing Error #24657

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fabietto01 commented on Dec 24, 2024

eleanorjboyd commented on Jan 6, 2025

fabietto01 commented on Jan 7, 2025

lukasz-karolewski commented on Apr 4, 2025

eleanorjboyd commented on Sep 23, 2026

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