Unit tests powernets to make sure the whole station is connected. (#70090)

code/controllers/subsystem/machines.dm

@@ -5,7 +5,8 @@ SUBSYSTEM_DEF(machines)
 	wait = 2 SECONDS
 	var/list/processing = list()
 	var/list/currentrun = list()
-	var/list/powernets = list()
+	///List of all powernets on the server.
+	var/list/datum/powernet/powernets = list()
 
 /datum/controller/subsystem/machines/Initialize()
 	makepowernets()

code/controllers/subsystem/mapping.dm

@@ -397,7 +397,13 @@ Used by the AI doomsday and the self-destruct nuke.
 GLOBAL_LIST_EMPTY(the_station_areas)
 
 /datum/controller/subsystem/mapping/proc/generate_station_area_list()
-	var/static/list/station_areas_blacklist = typecacheof(list(/area/space, /area/mine, /area/ruin, /area/centcom/asteroid/nearstation))
+	var/static/list/station_areas_blacklist = typecacheof(list(
+		/area/space,
+		/area/mine,
+		/area/ruin,
+		/area/centcom/asteroid/nearstation,
+		/area/icemoon,
+	))
 	for(var/area/A in world)
 		if (is_type_in_typecache(A, station_areas_blacklist))
 			continue