unzobrist test just to make sure

src/test/java/baritone/builder/WorldStateTest.java

@@ -0,0 +1,39 @@
+/*
+ * This file is part of Baritone.
+ *
+ * Baritone is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Baritone is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Baritone.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package baritone.builder;
+
+
+import org.junit.Test;
+
+import java.util.Random;
+
+import static org.junit.Assert.assertEquals;
+
+public class WorldStateTest {
+
+    @Test
+    public void testZobrist() {
+        Random rand = new Random(5021);
+        for (int i = 0; i < 1000; i++) {
+            long pos = rand.nextLong();
+            long zobrist = WorldState.zobrist(pos);
+            long un = WorldState.unzobrist(zobrist);
+            assertEquals(pos, un);
+        }
+    }
+}