m.ptype = 0;
        NdrBuffer buf = new NdrBuffer(new byte[1024], 0);
        m.encode(buf);
        assertTrue(m.alloc_hint > 0);
    }

    @Test
    void testEncodeWritesCorrectHeader() throws Exception {
        TestMessage m = new TestMessage();
        m.ptype = 0;
        m.flags = 0x05;
        m.call_id = 0x123;

        NdrBuffer buf = new NdrBuffer(new byte[1024], 0);