Legal Question in Entertainment Law in California

Don't understand the question. You would be nuts to tell your employer, and what is the employer going to do, ask your doctor? Hire a private eye to follow you around? Thanks to the controversial California Supreme Court ruling in the Ragingwire case, employers may lawfully drug-test employees and prospective employees; and then fire them, or not hire them, based on the presence of trace amounts of marijuana metabolites, even if they are "registered medical marijuana patients." Some people, some employers, and some public agencies, in California and elsewhere, believe that the presence of trace amounts of marijuana metabolites equates to being "under the influence of marijuana."