assertTrue(buf.dec_ndr_short() > 0); // length
        assertEquals(0, buf.dec_ndr_short()); // auth length
        assertEquals(0x123, buf.dec_ndr_long()); // call_id
    }

    @Test
    void testEncodeWithDifferentFlags() throws Exception {
        for (int flag : new int[] { 0, 0xFF, 0x01, 0x80 }) {
            TestMessage m = new TestMessage();
            m.ptype = 0;
            m.flags = flag;