hook to install tox and run unit tests

after-test.sh

#!/bin/bash
set -exuo pipefail

# workaround for a bug with setuptools
mkdir -p ./src

# create a new virtual environment if it doesn't exist
if [ ! -d .venv ]; then
    python3 -m venv .venv
fi

# install tox if it doesn't exist in the virtual environment
if [ ! -f .venv/bin/tox ]; then
    .venv/bin/pip install tox
fi

# run unit tests
.venv/bin/tox