coolant leak, water pump maybe?

[fiveohpatrol]

so i can just go to autozone and they will test th epressure in my system for me? i've never checked it, like i said i've not had any experience with cooling systems and could use some help, as far as i could tell there didnt seem to be any coolant on the actual pump, but there was some that looks like it has been trickling down the radiator hose from where it attaches to the pump so im narrowing it down to the pump and that hose, with my luck it'll be the pump anyone know why theres white smoke/steam coming off the top of the pump? it seems to me like the pump is getting too hot from maybe the bearings inside being bad, what will the pressure check tell me? if it checks out does that mean that the pump is fine? also what does the radiator cap have to do with it, the leak isnt coming from there so i dont see how it would effect anything, thanks again guys for your help