@Override
            public String getIndexAdminArrayFields() {
                return "lang,role,label,anchor,virtual_host";
            }

            @Override
            public String getIndexAdminDateFields() {
                return "expires,created,timestamp,last_modified";
            }

            @Override
            public String getIndexAdminIntegerFields() {
                return "";
            }

        assertEquals("alerts", fields[0]);
        assertEquals("roles", fields[1]);
    }

    @Test
    public void test_indexAdminDateFields() {
        String[] fields = fessConfig.getIndexAdminDateFields().split(",");
        assertEquals(3, fields.length);
        assertEquals("expires", fields[0]);
        assertEquals("start_time", fields[1]);
        assertEquals("end_time", fields[2]);
    }