Cannabis Creamer - Question

My friend accidentally took a sip of my coffee with homemade cannabis creamer.

They have a piss test in two days... They threw up immediately after, then ate charcoal to absorb as much as possible and then threw up again until their stomach was empty.

I feel incredibly guilty and should have been more careful, but they keep telling me they should be fine.

Please give me your thoughts & hopefully some piece of mind.

Does throwing up ensure that none of the swallowed cannabis will be absorbed? It was right after they swallowed that I realized what happened.

Friend Specs: Height - 69" Weight - 190lbs Age - 30