/**
  * Tests release method for entry in deleted state.
  *
  * <p>Invoking release on deleted entry should not have any effect on its state.
  */
 public void testReleaseDeleted() {
   delete();
   _queueEntry.release();
   assertTrue(
       "Invoking of release on entry in DELETED state should not have any effect",
       _queueEntry.isDeleted());
 }
 /** A helper method to put tested object into deleted state and assert the state */
 private void delete() {
   _queueEntry.delete();
   assertTrue(
       "Queue entry should be in DELETED state after invoking of delete method",
       _queueEntry.isDeleted());
 }