"You can test it by pouring cool water on pump and see it it starts, BUT you can seize the pump up doing that, so I do not think it is worth the risk."
Worst part is, if that happens, you have all but proved the pump was probably OK to begin with. I'd start with a compression test hot, then cold. While the injectors are out, pop test them. if all that checks out, repair or replace the IP.