buf.enc_ndr_long(this.alloc_hint);
        }

        buf.setIndex(start);
        encode_header(buf);
        buf.setIndex(start + this.length);
    }

    @Override
    public void decode(final NdrBuffer buf) throws NdrException {
        decode_header(buf);

        if (this.ptype != 12 && this.ptype != 2 && this.ptype != 3 && this.ptype != 13) {

            buf.enc_ndr_long(alloc_hint);
        }

        buf.setIndex(start);
        encode_header(buf);
        buf.setIndex(start + length);
    }

    @Override
    public void decode(final NdrBuffer buf) throws NdrException {
        decode_header(buf);

        if (ptype != 12 && ptype != 2 && ptype != 3 && ptype != 13) {

        buf.setIndex(0);
        m.decode_header(buf);
        assertEquals(0, m.ptype);
    }

    @Test
    void testDecodeHeaderInvalidVersion() {
        NdrBuffer buf = new NdrBuffer(new byte[10], 0);
        buf.enc_ndr_small(4); // bad major
        buf.enc_ndr_small(0);
        TestMessage msg = new TestMessage();
        assertThrows(NdrException.class, () -> msg.decode_header(buf));
    }

    @Test