If AI has a survival instinct, then we should theoretically see evidence of it if we construct the right environment for AI to express it. Animals and cellular organisms demonstrate a survival instinct under the right conditions, so we would have to find equivalent conditions for a hypothetical machine intelligence.

Conversely, we know that if we take animals that do have a survival instinct and put them into the wrong kinds of environments, they will not thrive and will degenerate or possibly commit suicide. Similarly, if AI did have a survival instinct, do we think we've created an environment where that could be reasonably tested and observed?