I may or may not be getting tested, which option should I go with?

I got a job in the IT department for a healthcare company. It was mentioned in my application that I may be drug tested. I've gone through the background check and new hire paperwork but they haven't mentioned anything about a drug test yet. Tomorrow is my first day. I've never taken a drug test for employment purposes before. How likely would it be that they ask me to piss in a cup at the office?

I haven't smoked since the night of June 26. Before that, I was a regular and heavy smoker. On average I would go through about an 8th a week. I'm 6'0 ~145-155lbs with a high metabolism. I haven't really done much exercise though. I have a friend who is willing to let me use his urine. I also have an old bottle of quick fix that I bought back in February or March. I don't want to be unexpectedly drug tested so I've been thinking about going to work for the next week with either the friend's urine or the quickfix.

Should I:

A. Use my own urine
B. Use my friend's urine
C. Use the old bottle of quickfix

I'm leaning towards carrying around my friend's piss in an empty bottle of quick fix but then I'd need to get a fresh sample from him every morning.

The quick fix is kind of old and it's been heated and reheated a few times because I was in a drug treatment program and I kept tucked behind the waist of my pants like a gun to keep it warm. I did this for a few weeks near the end of the program because I was expecting to be tested but I didn't get tested for my third one so I kept the bottle. I'm also worried that they can detect that it's synthetic urine. Would they be able to tell if it's synthetic? I've heard certain labs in California can detect it (I'm in California) but then again I'm not even sure how it works. Could they take my urine sample at the office and send it off to a lab?

I could also just use my own urine but I don't trust myself 100% that I'm clean since I've been a chronic smoker pretty much for the last 5 years with the longest break being about a month in that time.

Which option should I go with?