Adds a unit test to make sure prey can breathe inside pred bellies.

code/unit_tests/unit_test_vr.dm

@@ -0,0 +1,26 @@
+//
+// VOREStation extensions to unit test framework.
+//
+
+/datum/unit_test
+	var/static/default_mobloc = null
+
+/datum/unit_test/proc/create_test_mob(var/turf/mobloc = null, var/mobtype = /mob/living/carbon/human, var/with_mind = FALSE)
+	if(isnull(mobloc))
+		if(!default_mobloc)
+			for(var/turf/simulated/floor/tiled/T in world)
+				var/pressure = T.zone.air.return_pressure()
+				if(90 < pressure && pressure < 120) // Find a turf between 90 and 120
+					default_mobloc = T
+					break
+		mobloc = default_mobloc
+	if(!mobloc)
+		fail("Unable to find a location to create test mob")
+		return 0
+
+	var/mob/living/carbon/human/H = new mobtype(mobloc)
+
+	if(with_mind)
+		H.mind_initialize("TestKey[rand(0,10000)]")
+
+	return H