Use pytest in github actions

[s-martin]

I added the python tests used by the components to Github Actions to run on commit.

@veloxidSchweiz, could you check, if this makes sense?

[veloxidSchweiz]

looks good....
Here my suggestion to fix the docker image ci:

by some change to the docker file you get it to work...

RUN mkdir /code
WORKDIR /code

RUN groupadd --gid 1000 pi ;\
  useradd -u 1000 -g 1000 -G sudo -d /home/pi -m -s /bin/bash -p '$1$iV7TOwOe$6ojkJQXyEA9bHd/SqNLNj0' pi ;\
  chown -R 1000:1000 /code /home/pi


RUN export DEBIAN_FRONTEND=noninteractive ;\
  apt-get update ;\
  apt-get -y install curl gnupg sudo nano python3-pytest  python3-pip ;\
  echo 'deb http://raspbian.raspberrypi.org/raspbian/ buster main contrib non-free rpi' > /etc/apt/sources.list.d/raspi.list ;\
  echo 'deb http://archive.raspberrypi.org/debian/ buster main' >> /etc/apt/sources.list.d/raspi.list

RUN export DEBIAN_FRONTEND=noninteractive ;\
  apt-get update ;\
  apt-get -y dist-upgrade --auto-remove --purge ;\
  apt-get -y install wget build-essential git iw locales wpasupplicant;\
  apt-get clean ;\
  touch /boot/cmdline.txt /etc/sysctl.conf ;\
  rm -rf /var/cache/apt/* /var/lib/apt/lists/*

RUN export DEBIAN_FRONTEND=noninteractive ;\
  curl http://raspbian.raspberrypi.org/raspbian.public.key | apt-key add - ;\
  curl http://archive.raspberrypi.org/debian/raspberrypi.gpg.key | apt-key add - ;\
  echo 'pi ALL=(ALL) NOPASSWD: ALL' > /etc/sudoers.d/pi ;\
  apt-get clean ;\
  rm -rf /var/cache/apt/* /var/lib/apt/lists/*


RUN export DEBIAN_FRONTEND=noninteractive ;\
  apt-get update ;\
  apt-get -y install curl gnupg sudo nano python3-pytest  python3-pip

RUN pip3 install mock

COPY . /code
RUN  chown -R 1000:1000 /code /home/pi
RUN pip3 install -r /code/components/gpio_control/requirements.txt

RUN chmod +x /code/scripts/installscripts/buster-install-default.sh

ENTRYPOINT pytest-3

USER pi