update vctest & add new test

dev/tests/chunks.lua

@@ -0,0 +1,27 @@
+test.set_setting("chunks.load-distance", 3)
+test.set_setting("chunks.load-speed", 1)
+
+test.reconfig_packs({"base"}, {})
+test.new_world("demo", "2019", "core:default")
+
+local pid1 = player.create("Xerxes")
+assert(player.get_name(pid1) == "Xerxes")
+
+local pid2 = player.create("Segfault")
+assert(player.get_name(pid2) == "Segfault")
+
+local seed = math.floor(math.random() * 1e6)
+print("random seed", seed)
+math.randomseed(seed)
+
+for i=1,25 do
+    if i % 5 == 0 then
+        print(tostring(i*4).." % done")
+        print("chunks loaded", world.count_chunks())
+    end
+    player.set_pos(pid1, math.random() * 100 - 50, 100, math.random() * 100 - 50)
+    player.set_pos(pid2, math.random() * 200 - 100, 100, math.random() * 200 - 100)
+    test.tick()
+end
+
+test.close_world(true)