What do you think is the expected next response of a hurt and jaded person in regards to a new involvement?

The person in question states up front what a mess they are with baggage and reluctance to become exclusive with anyone anytime soon. However, this person now wants to spend all their time with you and seems to blossom with the shared affection. I personally think their first move after feeling enthralled, safe and optimistic is to test themselves by doing or saying something to upset the direction of the involvement, not to destroy it but to see for themselves how badly they want or miss this new thing they’ve come into. Do you think this is pretty common and could you see it through or would you not bother and walk away at first sign of trouble?