You can never know because every business has the right to test. The best thing to do is not smoke for at least two to three weeks before you apply then after you get the job and possibly test, just make sure to never smoke on the job and work hard so they never suspect that you smoke on the weekends or at night after you're done with everything. Smoking will be fine as long as you don't bring it to work and as long as you work hard and well, they'll never bug you about it.

The Duderino