Increase test coverage for DreamMapManager (#2379)

Author: amylizzle

Content.IntegrationTests/DMProject/Tests/change_area_appearance.dm

@@ -0,0 +1,12 @@
+/area/subtype
+	color = rgb(255,0,0)
+
+/datum/unit_test/test_change_area_appearance/RunTest()
+	var/area/subtype/S = new()
+	var/list/block_turfs = block(locate(1,1,1), locate(2,2,2))
+	for(var/turf/T in block_turfs)
+		S.contents += T
+
+	ASSERT(istype(locate(1,1,1):loc, /area/subtype))
+	locate(1,1,1):loc:color = rgb(0,0,0)
+	ASSERT(locate(2,2,2):loc:color == rgb(0,0,0))

Content.IntegrationTests/DMProject/Tests/change_world_size.dm

@@ -0,0 +1,17 @@
+/datum/unit_test/test_change_world_size/RunTest()
+	var/oldz = world.maxz
+	var/oldx = world.maxx
+	var/oldy = world.maxy
+	world.maxz = oldz+1
+	ASSERT(world.maxz == oldz+1)
+	world.maxx = oldx+1
+	ASSERT(world.maxx == oldx+1)
+	world.maxy = oldy+1
+	ASSERT(world.maxy == oldy+1)
+	ASSERT(istype(locate(oldx+1, oldy+1, oldz+1), /turf))
+
+	world.maxz = oldz
+	world.maxx = oldx
+	world.maxy = oldy
+	ASSERT(isnull(locate(oldx+1, oldy+1, oldz+1)))
+