@Test
 public void testUnsetMask() {
   byte[] value = AccountAccessMask.setMask(new byte[0], AccountAccessMask.ACCESS_SKILL_QUEUE);
   value = AccountAccessMask.setMask(value, AccountAccessMask.ACCESS_ACCOUNT_BALANCE);
   Assert.assertTrue(AccountAccessMask.isValidMask(value));
   for (AccountAccessMask next : AccountAccessMask.values()) {
     switch (next) {
       case ACCESS_SKILL_QUEUE:
       case ACCESS_ACCOUNT_BALANCE:
         Assert.assertTrue(AccountAccessMask.isAccessAllowed(value, next));
         break;
       default:
         Assert.assertFalse(AccountAccessMask.isAccessAllowed(value, next));
     }
   }
 }
 @Test
 public void testSetMask() {
   byte[] value = AccountAccessMask.setMask(new byte[0], AccountAccessMask.ACCESS_SKILL_QUEUE);
   Assert.assertTrue(AccountAccessMask.isValidMask(value));
   Assert.assertTrue(
       AccountAccessMask.isAccessAllowed(value, AccountAccessMask.ACCESS_SKILL_QUEUE));
   int val = AccountAccessMask.ACCESS_SKILL_QUEUE.getMaskValue();
   int offset = val / 8;
   int bit = val % 8;
   for (int i = 0; i < value.length; i++) {
     if (i == offset) {
       Assert.assertEquals(1L << bit, value[i]);
     } else {
       Assert.assertEquals(0, value[i]);
     }
   }
 }