unittest-parallel hangs after tests are finished

[oneumyvakin]

Hello,

there is https://github.com/craigahobbs/unittest-parallel (https://pypi.org/project/unittest-parallel/) module using multiprocessing and has a very small code base https://github.com/craigahobbs/unittest-parallel/blob/main/src/unittest_parallel/main.py

Unfortunately geventmp can't helps unittest-parallel to finish it's work with gevent.
Tests are executed successfully but there is a hang after the tests execution.

Here two simple tests files:

tests/# cat test_1.py

import unittest
import logging

class TestCompute1(unittest.TestCase):

    def test_compute_1(self):

        logging.getLogger().warning("test_compute_1 start")

tests/# cat test_1.py

import unittest
import logging

class TestCompute2(unittest.TestCase):

    def test_compute_2(self):
        logging.getLogger().warning("test_compute_2 start")

Here is a Dockerfile:

FROM python:3.12-bullseye

RUN pip install --upgrade pip && \
    python -m pip install pytest && \
    python -m pip install unittest-parallel && \
    python -m pip install geventmp==0.0.9

COPY ./ /tests

# Executed successfully:
RUN python -m unittest_parallel -v --failfast -j 1 -t . -s /tests/

# Hangs forever:
RUN python -m gevent.monkey --module unittest_parallel -v --failfast -j 1 -t . -s /tests/