Python approach
Install pyenv and poetry and install the dependencies.
$ poetry install
Then run the tests with coverage
$ poetry run pytest --cov . --doctest-modules --cov-report xml:cov.xml --cov-report term -f .
You can also run the tests without coverage but it is less fancy
$ poetry run pytest --doctest-modules -f .
If you use VSCode you can check the Coverage Gutters extension to display covered lines.