assertEquals("\\28admin\\29", ldapManager.escapeLDAPSearchFilter("(admin)"));
        assertEquals("\\28objectClass=\\2a\\29", ldapManager.escapeLDAPSearchFilter("(objectClass=*)"));
    }

    @Test
    public void test_escapeLDAPSearchFilter_withNullByte() {
        LdapManager ldapManager = new LdapManager();
        ldapManager.init();

    }

    String getLdapAdminUserObjectClasses();

    default Attribute getLdapAdminUserObjectClassAttribute() {
        final Attribute oc = new BasicAttribute("objectClass");
        split(getLdapAdminUserObjectClasses(), ",").of(stream -> stream.filter(StringUtil::isNotBlank).forEach(s -> oc.add(s.trim())));
        return oc;
    }

    String getLdapAdminUserFilter();

        if (fessConfig.isLdapRoleSearchUserEnabled()) {
            roleSet.add(normalizePermissionName(systemHelper.getSearchRoleByUser(ldapUser.getName())));
        }

        // LDAP: cn=%s
        // AD: (&(objectClass=user)(sAMAccountName=%s))
        final String filter = String.format(accountFilter, escapeLDAPSearchFilter(ldapUser.getName()));
        if (logger.isDebugEnabled()) {
            logger.debug("Account filter: {}", filter);