Here is guidance from the Alabama Department of Public Health to answer some of your questions about testing.

This includes when to get tested, what should happen after you get tested, and also addresses the person’s return to work.

IT IS VERY IMPORTANT THAT INDIVIDUALS REMAIN ISOLATED — AWAY FROM OTHERS — UNTIL THE PERSON AT LEAST GETS THE TEST RESULT RETURNED. 

Additionally, here is more guidance for workplaces from the Centers for Disease Control and Prevention.