> The thing missing from this test is that critical practical piece: if there was an oncoming car, will the Tesla do something to avoid the collision? I would assume that not getting in a head-on crash is higher priority than staying in the lane markings.

Considering that a Tesla is happy to ram you into the back of a stopped vehicle, at highway speeds, I wouldn't have that hope.

Autopilot does two things - follows the vehicle in front of you, and stays between the lane lines.