assertEquals(DcerpcConstants.RPC_C_PF_BROADCAST, message.getFlags());
        }

        @Test
        @DisplayName("getOpnum should return correct operation number")
        void testGetOpnum() {
            assertEquals(10, message.getOpnum()); // TestDcerpcMessage was created with opnum 10
        }
    }

            samr.SamrCloseHandle message = new samr.SamrCloseHandle(mockPolicyHandle);

            // Then: Should have correct opnum and handle
            assertEquals(0x01, message.getOpnum());
            assertEquals(mockPolicyHandle, message.handle);
        }

        @Test
        @DisplayName("Should encode input parameters correctly")
        void testEncodeIn() throws NdrException {

        // Arrange
        short level = 1;
        queryPolicy = new MsrpcQueryInformationPolicy(mockPolicyHandle, level, mockNdrObject);

        // Act
        int opnum = queryPolicy.getOpnum();

        // Assert
        assertEquals(0x07, opnum); // Expected opnum for LsarQueryInformationPolicy
    }

    @Test
    void multipleInstances_shouldBeIndependent() {
        // Arrange

        this.max_xmit = handle.getMaxXmit();
        this.max_recv = handle.getMaxRecv();
        this.ptype = 11;
        this.flags = DCERPC_FIRST_FRAG | DCERPC_LAST_FRAG;
    }

    @Override
    public int getOpnum() {
        return 0;
    }

    @Override
    public void encode_in(final NdrBuffer buf) throws NdrException {
        buf.enc_ndr_short(this.max_xmit);
        buf.enc_ndr_short(this.max_recv);

        this.binding = binding;
        max_xmit = handle.max_xmit;
        max_recv = handle.max_recv;
        ptype = 11;
        flags = DCERPC_FIRST_FRAG | DCERPC_LAST_FRAG;
    }

    @Override
    public int getOpnum() {
        return 0;
    }

    @Override
    public void encode_in(final NdrBuffer buf) throws NdrException {
        buf.enc_ndr_short(max_xmit);
        buf.enc_ndr_short(max_recv);

     */
    private static class TestMessage extends DcerpcMessage {
        int decodedValue = 0;

        TestMessage() {
            /* nothing */
        }

        @Override
        public int getOpnum() {
            return 0x1234;
        }

        @Override
        public void encode_in(NdrBuffer buf) throws NdrException {
            buf.enc_ndr_small(0xAB);
        }

        @Override

    void shouldHaveCorrectOpnum() {
        // When
        MsrpcSamrConnect2 msrpcSamrConnect2 = new MsrpcSamrConnect2(testServer, testAccess, mockPolicyHandle);

        // Then
        assertEquals(0x39, msrpcSamrConnect2.getOpnum(), "Should have opnum 0x39 from parent class");
    }

    @Test
    @DisplayName("Should work with null server name")
    void shouldHandleNullServerName() {
        // When

            }
        }
    }

    /**
     * LSA close handle message.
     */
    public static class LsarClose extends DcerpcMessage {

        @Override
        public int getOpnum() {
            return 0x00;
        }

        /** Return value from the RPC call. */
        public int retval;
        /** Policy handle to be closed. */
        public rpc.policy_handle handle;

            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 {
            // Encode WitnessRegister request parameters

    }

    @Test
    void testShareEnumAllGetOpnum() {
        srvsvc.ShareEnumAll enumAll = new srvsvc.ShareEnumAll(null, 0, null, 0, 0, 0);
        assertEquals(0x0f, enumAll.getOpnum());
    }