New World constructor with ability to set max region quantity. New te…

…st to check autosave works

src/main/java/mregioneer/mcaliases/World.java

@@ -74,6 +74,15 @@ public World(File world_dir) throws IOException {
             }
         }
     }
+
+    public World(File world_dir, int region_limit) throws IOException {
+        this(world_dir);
+
+        this.regions = new ConcurrentLinkedHashMap.Builder<Point2d, Region>()
+                .maximumWeightedCapacity(region_limit)
+                .listener(listener)
+                .build();
+    }
 
     /**
      * Save all cashed regions to their files

src/test/java/TestRegionAutoRemove.java

@@ -0,0 +1,40 @@
+import mregioneer.mcaliases.World;
+import mregioneer.utils.Point3d;
+import org.ini4j.Ini;
+import org.junit.Test;
+
+import java.io.File;
+import java.util.Random;
+
+import static org.junit.Assert.assertTrue;
+
+public class TestRegionAutoRemove {
+    @Test
+    public void testAdd() {
+        World world;
+        try {
+            //initializing path to region folder
+            String presets_url = TestReadWrite.class.getClassLoader().getResource("local_presets.ini").getPath();
+            Ini ini = new Ini(new File(presets_url));
+            String path_to_mca_folder = ini.get("paths", "world_path", String.class);
+
+            world = new World(new File(path_to_mca_folder), 1);
+
+            Random rand = new Random(1);
+            byte id = (byte) rand.nextInt(24);
+
+            Point3d point1 = new Point3d(1, 1, 64);
+            Point3d point2 = new Point3d(-2,-2,64);
+
+            world.changeBlockID(point1, id);
+            world.changeBlockID(point2, id);
+
+            world.save();
+
+            assertTrue(world.getBlockId(point1) == world.getBlockId(point2));
+
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+}