Debugging unittest tests doesn't work

[DonJayamanne]

From @yRefl3x on March 6, 2017 11:11

Environment data

VS Code version: 1.10.1
Python Extension version: 0.5.9
Python Version: 2.7.5
OS and version: Windows 10

Actual behavior

After clicking on the "Debug Test" lens of a test method, debugging doesn't start. "Running Tests" is displayed at the bottom of the VSCode window indefinitely.

Expected behavior

Debugging starts.

Steps to reproduce:

I have the following folder structure:

Issue
    cool_package
        __init__.py
        cool_module.py
    test
        __init__.py
        test_cool_module.py

cool_module.py

def foo(a, b):
    return a + b

test_cool_module.py

import unittest

from cool_package.cool_module import foo

class TestCoolModule(unittest.TestCase):
    def test_foo(self):
        res = foo(1, 2)
        self.assertEquals(res, 3)

• Set a breakpoint at line res = foo(1, 2)
• Click "Debug Test" in test method code lens

Settings

settings.json:

{
    "python.unitTest.unittestArgs": [
        "-v",
        "-s",
        "test",
        "-p",
        "test_*.py"
    ],
    "python.unitTest.unittestEnabled": true
}

Logs

Output from Python Test Log output panel

READY

Copied from original issue: DonJayamanne/pythonVSCode#797

[DonJayamanne]

From Stav (@syagev) on March 14, 2017 8:56

Same exact symptoms here.
win10, python ext 0.6.0, VSC 1.10.2, Python 3.5.3

EDIT: "reload window" VSC command seems to solve this every time this happens

[DonJayamanne]

From @yRefl3x on March 14, 2017 9:56

Stav (@syagev) I just tried reloading the window before debugging as you suggested. The test actually runs, but it doesn't debug. The breakpoint just changes to a grey circle for a short time but execution isn't stopped. The test just runs like when choosing "Run Tests".

[DonJayamanne]

From Alex Whittemore (@alexwhittemore) on March 29, 2017 17:14

Confirmed, but I can't try "reload window" to solve it, because "discovering tests" has stopped completing for me.

[DonJayamanne]

From Guilherme Passero (@gpassero) on April 1, 2017 14:5

I can debug tests when I run them with the following command line (in the end of the test file script). It may be a temporary solution for you.

if __name__ == '__main__':
    unittest.main()

[DonJayamanne]

From Alex Whittemore (@alexwhittemore) on April 1, 2017 15:59

Update: I can get unit tests to discover if I run "discover unit tests," then, while it works, run "run all tests," which causes discovery to alert failure. At this point, I can "run unit tests", which will trigger discovery successfully. At least, I think that's the flow. Will verify back at a computer.

[DonJayamanne]

From Larry & Leo (@xqliu) on April 18, 2017 16:55

Alex Whittemore (@alexwhittemore) How did you run "discover unit tests"? method?

I can not find this command on the command panel nor any place ...

Thanks :)

[DonJayamanne]

From Alex Whittemore (@alexwhittemore) on April 18, 2017 18:25

In the bottom bar, bottom left, where it usually says "run tests" - I think it'll say "discovery failed" when such is the case, and clicking it will bring up the command palette with an option to discover.

[DonJayamanne]

Alex Whittemore (@alexwhittemore) Sorry, please run the command Run All Unittests

[DonJayamanne]

From @VicLiang621 on May 28, 2017 7:38

I have a similar issue where when you click "Debug test" the running tests never stop and breakpoints do not matter. When trying to implement the if __name__ == '__main__': unittest.main(), seems to be a temporary fix.

[DonJayamanne]

From sdtom on June 19, 2017 15:6

Similar issue, my workaround.. keep clicking "debug test" over and over.. first time gets READY, second time generates an error.. but maybe 1 out of 10 times instead of just getting READY, things turn orange and debugging works fine

[DonJayamanne]

From Matt Morgis (@mattmorgis) on July 22, 2017 0:56

I am having the same issue with both the unittest and pytest options, both generate the same error. If you can point me in the right direction, I can get a fix merged in.

I created a sample project to help identify the issue: https://github.com/MattMorgis/python-tests

Each time I hit Debug Test inline in VS Code, I get this output:

FAILED (errors=1)
Traceback (most recent call last):
  File "/Users/morgism/.vscode/extensions/donjayamanne.python-0.6.9/pythonFiles/PythonTools/visualstudio_py_testlauncher.py", line 343, in <module>
    main()
  File "/Users/morgism/.vscode/extensions/donjayamanne.python-0.6.9/pythonFiles/PythonTools/visualstudio_py_testlauncher.py", line 238, in main
    enable_attach(opts.secret, ('127.0.0.1', getattr(opts, 'port', DEFAULT_PORT)), redirect_output = True)
  File "/Users/morgism/.vscode/extensions/donjayamanne.python-0.6.9/pythonFiles/PythonTools/ptvsd/attach_server.py", line 167, in enable_attach
    server.bind(address)
  File "/Users/morgism/anaconda/envs/py2Env/lib/python2.7/socket.py", line 228, in meth
    return getattr(self._sock,name)(*args)
socket.error: [Errno 48] Address already in use

I am using a conda environment and have my Python path set both in settings.json and as an ENV variable. pytest is installed there when trying to run that configuration.