I think it makes sense to do a test. Might save pain for both you and the employee. But I find that the person you want is a smart person w a good attitude who is willing to learn and chip in where their help is needed- hopefully wo you having to ask.

What would be summary after this. Does Employment Skill Test should me made mandatory or not???  

^no. The summary is: it depends.

Reading all of these had me alot of ideas...

Really but nobody replied my answer i stay in buford georgia looking for employer screening agency. so how to gather information, where to look for them 

Thanks everyone for the comment. Looking for a employer recruitment firm for drug testing and drug screening