create pytest tests

create_tests.sh

#! /usr/bin/env bash

set -e
set -u
set -x

for testdir in foobar hello/world example
do
    mkdir -p $testdir
    for i in {1..3}
    do
        counter=$(printf %02d $i)
        testfile=$testdir/test_${testdir##*/}_$counter.py
        echo "def test_sth(): assert True" > $testfile
    done
done