Saliva drug test

Sooo I'm here to ask how far back can a saliva drug test go? I applied for a new job and they require saliva drug tests haha. I smoked over 2 weeks ago after not smoking for over a year. Would all the thc be out of my system? I also might have breathed in some smoke from my friends smoking a blunt 3 days ago. Am I good to pass a saliva test?

Edit: my BMI is 28