@Override
            public String getLdapAdminUserFilter() {
                return "(uid=%s)";
            }
        };

        // Normal name
        assertEquals("(uid=testuser)", fessConfig.getLdapAdminUserFilter("testuser"));

        // Asterisk injection attempt
        assertEquals("(uid=test\\2a)", fessConfig.getLdapAdminUserFilter("test*"));

        // LDAP injection attempt