if (e == null) {
            e = new Entry(this.referent++, obj);
            this.referents.put(obj, e);
        }

        return e.referent;
    }

    /**
     * Encodes an NDR referent pointer.
     *
     * @param obj the object to encode as a referent
     * @param type the referent type
     */
    public void enc_ndr_referent(final Object obj, final int type) {
        if (obj == null) {

        assertEquals(9, SMBUtil.readInt2(buffer, bodyOffset));

        // Verify tree flags (0)
        assertEquals(0, SMBUtil.readInt2(buffer, bodyOffset + 2));

        // Verify path offset (points to after the 8-byte structure)
        int expectedPathOffset = bodyOffset + 8 - headerStart;
        assertEquals(expectedPathOffset, SMBUtil.readInt2(buffer, bodyOffset + 4));

        // Verify path length

        try (InputStream is = null) {
            if (is == null) {
                throw new IOException("Resource is null");
            }
            fail("Should not reach this point");
        } catch (IOException e) {
            assertEquals("Resource is null", e.getMessage());
            // No NullPointerException should be thrown when exiting try-with-resources
        }
    }

    /**

            when(mockTree.send(any(Request.class), any(RequestParam.class))).thenAnswer(inv -> (CommonServerMessageBlockResponse) smb2Resp);

            byte[] buf = new byte[16];

            // Skip advances internal file pointer; next read should use this offset
            in.skip(2);

            // Act
            int n = in.readDirect(buf, 0, 5);

            // Assert

        // Prepare test data with minimal valid resource record
        byte[] src = new byte[100];
        int srcIndex = 10;

        // Set up a minimal resource record response
        // Name pointer (0xC00C)
        src[srcIndex] = (byte) 0xC0;
        src[srcIndex + 1] = 0x0C;
        // Record type (NBSTAT = 0x0021)
        src[srcIndex + 2] = 0x00;
        src[srcIndex + 3] = 0x21;

            when(mockNdrBuffer.dec_ndr_short()).thenReturn((int) (short) 0, (int) (short) 0);
            when(mockNdrBuffer.dec_ndr_long()).thenReturn(0); // Null referent pointer

            // When: Decoding the unicode string
            unicodeString.decode(mockNdrBuffer);

            // Then: Verify the decoding sequence and values
            verify(mockNdrBuffer).align(4);

            if (ncpos < 0 || ncpos >= buffer.length) {
                throw new SMBProtocolDecodingException(
                        "Negotiate context offset points beyond buffer (offset: " + ncpos + ", buffer size: " + buffer.length + ")");
            }

            final NegotiateContextResponse[] contexts = new NegotiateContextResponse[negotiateContextCount];

        // Create the transport with safe defaults (no real sockets)
        transport = new SmbTransportImpl(ctx, address, 445, null, 0, false);

        // Reset MID to a known starting point for deterministic behavior
        setField(transport, "mid", new AtomicLong());
    }

    // Utility: reflectively set a private/protected field (searches up the hierarchy)

        assertEquals(expectedIndexNumber, info2.getIndexNumber());
    }

    @Test
    @DisplayName("Test encode with initial state")
    void testEncodeWithInitialState() {
        // Test encode without prior decode (initial state with indexNumber = 0)
        byte[] destinationBuffer = new byte[8];
        int bytesEncoded = fileInternalInfo.encode(destinationBuffer, 0);

        // Verify

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