Entirely depends on the employer.
Obviously this is going to depend on country, locality, industry, and specific company.
I live in the US in an East Coast state. I don’t know anyone who gets drug tested anymore, unless they are working in a sensitive industry (aerospace, as guided by the FAA) or have an accident on the job and are tested after the fact.
There are overlapping state and national laws. My state has legalized marijuana, but the national government, via the FAA, says “No” if I work in certain jobs. I do work in aerospace but not in one of those jobs that the FAA cares about drug testing for.
I always assume my social media will be searched.
My current boss looked me up on Facebook, I’d say that was a bad thing in most cases, but he’s a great boss.
Ok, do you have any social media where you can be (easily) identified? I mean, full name, your actual picture, searchable by phone number/e-mail that you gave your potential employer, etc…
Drug testing is pretty common. IDK about social media shit; but then, I don’t use my real info on any social media thing so they couldn’t find me even if they looked.