@Test
public void deleteAidTest() throws NoSuchFieldException, IllegalAccessException {

    assertEquals("init length", 0, getLength());
    addItem(AID_BASIC, HASH_BASIC, RULE_BASIC);
    assertEquals("length after addition", 1, getLength());
    deleteAid(AID_BASIC);
    assertEquals("length after deletion", 0, getLength());
}