Theres no telling what type of test your employer is going to conduct based on the relatively vague info provided to you by the employer. It could be an onsite instant test (oral or urine), or you could be giving a urine (or hair) sample at a collection facility, to be bagged, tagged, and sent off to a lab for analysis. Again, theres no telling - it all depends on the employer (non-DOT testing situations).

What is your toking history and when was your last toking session? Have you began any preparations to pass the drug test?