Am I allowed to take a Corona test on a Friday in Israel?
It seems almost certain that a Jew will be testing the samples or at least in putting the data on Shabbos to ensure we get our results within 24 hours.
Thank you for this service
Taking a corona test on erev Shabbos, really depends on the individual circumstances. In general though, unless the results are needed the extra few hours earlier in order to save human life, then the test should wait until Sunday. As you write, in order to prevent unneccessary chillul Shabbos.
Understandibly though if you suspect that you might have the virus you should not be going to shul etc.