}

        @Test
        @DisplayName("Test write string with odd Unicode alignment")
        void testWriteStringUnicodeAlignment() {
            testBlock.setUseUnicode(true);
            byte[] buffer = new byte[100];
            String testString = "Test";

            // Test odd Unicode alignment - headerStart affects alignment
            int bytesWritten = testBlock.writeString(testString, buffer, 2);

        return buf;
    }

    /**
     * Aligns the buffer index to the specified boundary with a fill value.
     *
     * @param boundary the alignment boundary
     * @param value the fill value for padding
     * @return the number of bytes added for alignment
     */
    public int align(final int boundary, final byte value) {
        final int n = align(boundary);
        int i = n;
        while (i > 0) {

        return this.buf;
    }

    /**
     * Aligns the buffer index to the specified boundary with a fill value.
     *
     * @param boundary the alignment boundary
     * @param value the fill value for padding
     * @return the number of bytes added for alignment
     */
    public int align(final int boundary, final byte value) {
        final int n = align(boundary);
        int i = n;
        while (i > 0) {

        // Then
        // The writeBytesWireFormat writes the structure and calculates padding
        // Base structure: 24 bytes, then pad8 alignment, then token: 5 bytes
        // Total bytes written includes padding for 8-byte alignment
        int expectedBytesWritten = 35;
        assertEquals(expectedBytesWritten, bytesWritten);

        // Verify structure

        String testString = "Aligned Unicode";
        byte[] buffer = new byte[testString.length() * 2 + 2 + 1]; // +1 for alignment
        int len = smb.writeString(testString, buffer, 1);
        // When dstIndex=1 and headerStart=1, (1-1)%2=0, no alignment padding needed
        // Length is string bytes (15*2) + 2 null terminators = 32
        assertEquals(testString.length() * 2 + 2, len);

            int expectedSize = Smb2Constants.SMB2_HEADER_LENGTH + 24 + 24; // header + structure + 1 lock
            expectedSize = ((expectedSize + 7) / 8) * 8; // 8-byte alignment
            assertEquals(expectedSize, req.size());
        }

        @Test
        @DisplayName("Should calculate size correctly with multiple locks")
        void testSizeWithMultipleLocks() {

    int writeString(final String str, final byte[] dst, int dstIndex, final boolean useUnicode) {
        final int start = dstIndex;

        try {
            if (useUnicode) {
                // Unicode requires word alignment
                if ((dstIndex - headerStart) % 2 != 0) {
                    dst[dstIndex++] = (byte) '\0';
                }
                System.arraycopy(str.getBytes(UNI_ENCODING), 0, dst, dstIndex, str.length() * 2);

        request.writeBytesWireFormat(buffer, 10);

        // Then - verify reserved field is zero
        assertEquals(0, SMBUtil.readInt2(buffer, 12));
    }

    @Test
    @DisplayName("Should verify size8 alignment")
    void testSize8Alignment() throws Exception {
        // Given
        Configuration mockConfig = mock(Configuration.class);
        Smb2TreeDisconnectRequest request = new Smb2TreeDisconnectRequest(mockConfig);

    /**
     * Rounds up the size to 8-byte alignment.
     *
     * @param size the size to align
     * @return the aligned size
     */
    protected static final int size8(final int size) {
        return size8(size, 0);
    }

    /**
     * Rounds up the size to the specified alignment.
     *
     * @param size the size to align
     * @param align the alignment boundary
     * @return the aligned size

        assertEquals((byte) 0x04, dst[0]); // First buffer format byte

        // Find the second buffer format byte by searching for it
        // In Unicode mode, the old filename is written as Unicode, then 0x04, then an alignment byte
        int secondBufferFormatIndex = -1;
        for (int i = 1; i < result - 1; i++) {
            if (dst[i] == (byte) 0x04) {
                secondBufferFormatIndex = i;
                break;