* @param dstIndex the starting offset in the buffer
     * @param unicode true to use Unicode encoding, false for OEM encoding
     * @return the number of bytes written
     */
    protected int writeString(final String str, final byte[] dst, int dstIndex, final boolean unicode) {
        final int start = dstIndex;
        if (unicode) {
            // Unicode requires word alignment

            if (useUnicode) {
                // should Unicode alignment be corrected for here?
                str = new String(src, srcIndex, len, UNI_ENCODING);
            } else {

                /* On NT without Unicode the fileNameLength
                 * includes the '\0' whereas on win98 it doesn't. I
                 * guess most clients only support non-unicode so
                 * they don't run into this.

        }
    }

    @Nested
    @DisplayName("Unicode Support Tests")
    class UnicodeSupportTests {

        @Test
        @DisplayName("Should always force unicode")
        void testIsForceUnicode() {
            assertTrue(response.isForceUnicode());
        }

        @Test
        @DisplayName("Should consistently return true for unicode")
        void testIsForceUnicodeMultipleCalls() {

        @DisplayName("Round-trip encoding/decoding should preserve string content")
        void testRoundTripConversion() {
            // Given
            String[] testStrings = { "Simple ASCII", "Unicode: 世界 🌍", "Mixed: ASCII + Unicode ñöt", "Special chars: !@#$%^&*()", "" };

            for (String original : testStrings) {
                // When - round trip through UNI encoding

        // Test toString with buffer containing non-printable characters or special unicode
        String unicodeChars = "你好世界"; // "Hello World" in Chinese
        UnicodeString unicodeStringChinese = new UnicodeString(unicodeChars, false);
        assertEquals(unicodeChars, unicodeStringChinese.toString(), "toString should handle unicode characters correctly");

        // Domain (12 bytes "DOMAIN" in Unicode at offset 112)
        message[28] = 12; // Length
        message[29] = 0;
        message[30] = 12; // Max Length
        message[31] = 0;
        message[32] = 112; // Offset
        message[33] = 0;
        message[34] = 0;
        message[35] = 0;

        // User (8 bytes "user" in Unicode at offset 124)
        message[36] = 8; // Length

            for (int _i = 0; _i < _uuid_nodes; _i++) {
                this.uuid.node[_i] = (byte) _src.dec_ndr_small();
            }
        }
    }

    /**
     * Unicode string structure for DCE/RPC operations.
     * Represents a Unicode string with length information.
     */
    public static class unicode_string extends NdrObject {

        /**
         * Default constructor for unicode_string.
         */

    /** Receive buffer size in bytes */
    int RCV_BUF_SIZE = Config.getInt("jcifs.smb1.smb.client.rcv_buf_size", DEFAULT_RCV_BUF_SIZE);
    /** Whether to use Unicode strings */
    boolean USE_UNICODE = Config.getBoolean("jcifs.smb1.smb.client.useUnicode", true);
    /** Whether to force Unicode usage */
    boolean FORCE_UNICODE = Config.getBoolean("jcifs.smb1.smb.client.useUnicode", false);
    /** Whether to use NT status codes */

        // OEM flag should not be set when default is Unicode
        assertFalse((unicodeType1.getFlags() & NtlmFlags.NTLMSSP_NEGOTIATE_OEM) != 0);

        // When OEM flag is passed, it gets OR'd with default flags
        // Since mockConfig.isUseUnicode() returns true, default flags include UNICODE
        assertTrue((oemType1.getFlags() & NtlmFlags.NTLMSSP_NEGOTIATE_OEM) != 0);

        assertEquals(26, result);
    }

    /**
     * Test writeBytesWireFormat method with Unicode.
     */
    @Test
    void testWriteBytesWireFormat_Unicode() {
        smbComOpenAndX = new SmbComOpenAndX(fileName, access, 0, andx);
        smbComOpenAndX.useUnicode = true;
        // For Unicode: 1 byte (initial null in writeBytesWireFormat)