Now generating primitive islands.

Favourable island mapper values.

src/test/java/ca/recrown/islandsurvivalcraft/world/IslandWorldMapperTest.java

@@ -1,6 +1,7 @@
 package ca.recrown.islandsurvivalcraft.world;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import java.util.Random;
 
@@ -29,11 +30,11 @@ public class IslandWorldMapperTest {
                 answers[x][y] = mapper.getWorldValue(x, y);
             }
         }
-        blockValCache.clearCache();
     }
-
+        
     @AfterEach
     public void individualCleanup() {
+        random.setSeed(SEED);
         blockValCache.clearCache();
     }
 
@@ -60,4 +61,15 @@ public class IslandWorldMapperTest {
             assertEquals(answers[x][y], mapper.getWorldValue(x, y), String.format("Occurred at (%d, %d)", x, y));
         }
     }
+    
+    @Test
+    public void test2048ValuesValidity() {
+        for (int i = 0; i < 1024; i++) {
+            int x = random.nextInt();
+            int y = random.nextInt();
+            assertTrue((mapper.getWorldValue(x, y) <= 1));
+            assertTrue((mapper.getWorldValue(x, y) >= -1));
+
+        }
+    }
 }