how can i play Singleplayer/Offline DayZ??

i have DayZ Standalone Server 0.50

my question is... how can i play this Offline?? i mean Singleplayer! i just want to try the game alone first.

is that possible?? like 127.0.0.1 ip?? i want to try it on Offline play without internet connection. only Singleplayer if its possible.

thanks!! hope someone reply here!

have you the official server files or pack?