// Assert
        assertNotNull(lookupSids);
        assertEquals(0, lookupSids.getPtype());
        assertEquals(DcerpcConstants.DCERPC_FIRST_FRAG | DcerpcConstants.DCERPC_LAST_FRAG, lookupSids.getFlags());
    }

    @Test
    void constructor_shouldHandleSingleSid() {
        // Arrange
        jcifs.SID mockSid = mock(jcifs.SID.class);

            while (off < tot) {
                n = tot - off;

                if (24 + n > max_xmit) {
                    msg.flags &= ~DCERPC_LAST_FRAG;
                    n = max_xmit - 24;
                } else {
                    msg.flags |= DCERPC_LAST_FRAG;
                    isDirect = false;
                    msg.alloc_hint = n;
                }

                msg.length = 24 + n;

            int fragSize = tot - off;
            if (24 + fragSize > this.max_xmit) {
                // need fragementation
                msg.flags &= ~DCERPC_LAST_FRAG;
                fragSize = this.max_xmit - 24;
            } else {
                msg.flags |= DCERPC_LAST_FRAG;
                msg.alloc_hint = fragSize;
            }

            msg.length = 24 + fragSize;

            if (off > 0) {

        }

        @Test
        @DisplayName("DCERPC_LAST_FRAG should have correct value")
        void testDcerpcLastFrag() {
            assertEquals(0x02, DcerpcConstants.DCERPC_LAST_FRAG, "DCERPC_LAST_FRAG should be 0x02");
        }

        @Test
        @DisplayName("DCERPC_PENDING_CANCEL should have correct value")

        assertTrue(dfsRootEnum.isFlagSet(DcerpcConstants.DCERPC_FIRST_FRAG));
        assertTrue(dfsRootEnum.isFlagSet(DcerpcConstants.DCERPC_LAST_FRAG));

        // Combined flags should equal FIRST_FRAG | LAST_FRAG
        int expectedFlags = DcerpcConstants.DCERPC_FIRST_FRAG | DcerpcConstants.DCERPC_LAST_FRAG;
        assertEquals(expectedFlags, dfsRootEnum.getFlags());
    }

    @Test

        assertNotNull(msrpcShareGetInfo);
        assertEquals(0, msrpcShareGetInfo.getPtype());
        assertEquals(DcerpcConstants.DCERPC_FIRST_FRAG | DcerpcConstants.DCERPC_LAST_FRAG, msrpcShareGetInfo.getFlags());

        // Verify parent class initialization
        assertNotNull(msrpcShareGetInfo.info);
        assertTrue(msrpcShareGetInfo.info instanceof srvsvc.ShareInfo502);

            assertEquals(11, bindWithParams.getPtype(), "Ptype should be 11 for bind message");
            assertEquals(DcerpcConstants.DCERPC_FIRST_FRAG | DcerpcConstants.DCERPC_LAST_FRAG, bindWithParams.getFlags(),
                    "Flags should be set for first and last fragment");

            // Verify private fields using reflection

        
        public WitnessRegisterStub(WitnessRegisterRequest request) {
            this.request = request;
            this.ptype = 0;
            this.flags = DCERPC_FIRST_FRAG | DCERPC_LAST_FRAG;
        }
        
        @Override
        public int getOpnum() { return WITNESS_REGISTER; }
        
        @Override
        public void encode_in(NdrBuffer buffer) throws NdrException {