@Test
 public void testIsValidMaskNo() {
   int max = 0;
   for (AccountAccessMask next : AccountAccessMask.values()) {
     max = Math.max(max, next.getMaskValue());
   }
   max = max + 1;
   byte[] testMask = new byte[((max + 1) / 8) + ((max + 1) % 8 > 0 ? 1 : 0)];
   int offset = max / 8;
   int bit = max % 8;
   testMask[offset] |= 1L << bit;
   Assert.assertFalse(AccountAccessMask.isValidMask(testMask));
 }
 @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));
     }
   }
 }