@kurmasz @taddallas thank you for your hints. i don’t see how the “Run command” option ensures whether R is installed, what version of R is installed or how do i install additional packages that may be necessary for a successfull autograding. i was expecting that there is an option “Run R 4.0.x” with a textbox on some init R script to install the necessary packages.
anyway, i have moved forward with GHA, which means, we don’t get the class rooster in classroom.github.com indicating which student pass the test for a particular assignment and with how many points, but each student still gets to see whether his/her code passes one or more tests, which is ultimately the goal here.
you can find one such assignment with GHA running R (without additional packages), checking whether the script runs and whether specific CSV files are there, via md5 checksums, here: