}

        @Test
        @DisplayName("Size should be consistent across multiple calls")
        void testSizeConsistency() {
            int size1 = echoRequest.size();
            int size2 = echoRequest.size();

            assertEquals(size1, size2);
        }

        @Test
        @DisplayName("Size should be 72 bytes (64 header + 4 body aligned to 8)")

        assertEquals("Expected structureSize = 2", exception.getMessage());
    }

    @Test
    @DisplayName("Test readBytesWireFormat with zero structure size throws exception")
    void testReadBytesWireFormatZeroStructureSize() {
        byte[] buffer = new byte[1024];
        int bufferIndex = 0;

        // Set structure size to 0 (invalid)

     * @see jcifs.internal.CommonServerMessageBlockRequest#size()
     */
    @Override
    public int size() {
        final int size = Smb2Constants.SMB2_HEADER_LENGTH + 56;
        int dataLength = 0;
        if (this.inputData != null) {
            dataLength += this.inputData.size();
        }
        if (this.outputData != null) {
            dataLength += this.outputData.size();
        }

     */
    public static String toHexString(final long val, final int size) {
        final char[] c = new char[size];
        toHexChars(val, c, 0, size);
        return new String(c);
    }

    /**
     * Converts a byte array to a hexadecimal string representation.
     *
     * @param src the source byte array to convert
     * @param srcIndex the starting index in the source array

        }

        // Since cache cannot store, getBuffer must create a new buffer of configured size
        byte[] got = impl.getBuffer();
        assertNotNull(got);
        assertEquals(8, got.length, "Allocation uses configured maximum size when cache is empty");
        assertNotSame(supplied, got, "Zero-sized cache must not return the released instance");
    }

        Smb2TreeDisconnectRequest request = new Smb2TreeDisconnectRequest(mockConfig);

        // When
        int size = request.size();

        // Then
        // Verify size includes SMB2_HEADER_LENGTH
        assertTrue(size >= Smb2Constants.SMB2_HEADER_LENGTH);

        // The actual calculation: (SMB2_HEADER_LENGTH + 4 + 7) & ~7

        }
        if (size > maxSize) {
            throw new IllegalArgumentException(fieldName + " size exceeds maximum (" + maxSize + "): " + size);
        }
    }

    /**
     * Validates buffer size for SMB2/3
     *
     * @param size the buffer size to validate
     * @param fieldName the field name for error reporting
     * @throws IllegalArgumentException if size is invalid
     */

    }

    /**
     * Validate file size from server
     *
     * @param size file size
     * @throws SmbException if size is invalid
     */
    public void validateFileSize(long size) throws SmbException {
        totalValidations.incrementAndGet();

        if (size < 0) {
            failedValidations.incrementAndGet();
            log.warn("Negative file size: {}", size);

     * Converts byte count to human-readable size format.
     *
     * @param size the size in bytes
     * @return formatted size string
     */
    public static String byteCountToDisplaySize(final long size) {
        return byteCountToDisplaySize(BigInteger.valueOf(size));
    }

    private static String byteCountToDisplaySize(final BigInteger size) {
        Objects.requireNonNull(size, "size");
        final String displaySize;

     * @return a hexadecimal string representation of the byte array
     */
    public static String toHexString(final byte[] src, final int srcIndex, int size) {
        final char[] c = new char[size];
        size = size % 2 == 0 ? size / 2 : size / 2 + 1;
        for (int i = 0, j = 0; i < size; i++) {
            c[j] = HEX_DIGITS[src[i] >> 4 & 0x0F];
            j++;