unittest: updated mob test

This additionally tests how much damage the mob does

src/test/java/org/bitbiome/entitiesTest/MobTest.java

@@ -13,6 +13,7 @@ public class MobTest {
     public static void setMob() {
         mob = new Mob();
         mob.setFriendly(true);   
+        mob.setDamage(0F);
     }
 
 
@@ -20,5 +21,10 @@ public class MobTest {
     public void testFriendly() {
         assertEquals(mob.isFriendly(), true);
     }
+
+    @Test
+    public void testDamage() {
+        assertEquals(mob.getDamage(), 0F);
+    }
     
 }