assertEquals(NameServicePacket.HEADER_LENGTH, written);

        assertEquals((byte) 0x12, dst[0]); // nameTrnId
        assertEquals((byte) 0x34, dst[1]);
        assertEquals((byte) (0x80 | (NameServicePacket.QUERY << 3) | 0x04 | 0x02 | 0x01), dst[2]); // flags1
        assertEquals((byte) (0x80 | 0x10 | NameServicePacket.FMT_ERR), dst[3]); // flags2
        assertEquals((byte) 0x00, dst[4]); // questionCount

        assertEquals(dst.length, n);

        // resumeKey (LE) at offset 6..9 should be 0x11121314 -> 14 13 12 11
        assertEquals((byte) 0x14, dst[6]);
        assertEquals((byte) 0x13, dst[7]);
        assertEquals((byte) 0x12, dst[8]);
        assertEquals((byte) 0x11, dst[9]);

        // filename content
        byte[] nameBytes = updatedName.getBytes();
        for (int i = 0; i < nameBytes.length; i++) {

        assertEquals(0x10, smbComOpenAndX.openFunction); // OPEN_FN_CREATE | OPEN_FN_FAIL_IF_EXISTS
    }

    /**
     * Test constructor with O_CREAT flag.
     */
    @Test
    void testConstructor_CreateAndOpen() {
        int flags = SmbFile.O_CREAT;
        smbComOpenAndX = new SmbComOpenAndX(fileName, access, flags, andx);

        // Parameters: status (2 bytes), converter (2 bytes), numEntries (2 bytes), totalAvailableEntries (2 bytes)
        byte[] buffer = { 0x00, 0x00, // status = 0 (Success)
                0x12, 0x34, // converter = 0x3412
                0x02, 0x00, // numEntries = 2
                0x05, 0x00 // totalAvailableEntries = 5
        };

        int bytesRead = response.readParametersWireFormat(buffer, 0, buffer.length);

        assertEquals(2, written, "writeParametersWireFormat should write exactly 2 bytes");

        // Verify little-endian encoding (0x1234 -> 0x34 0x12)
        assertEquals((byte) 0x34, buf[0], "First byte should be low byte of level");
        assertEquals((byte) 0x12, buf[1], "Second byte should be high byte of level");
    }

    @Test
    @DisplayName("all read* methods return zero")
    void testReadMethodsReturnZero() {

        // create a buffer with count = 0x1234 (4660 decimal)
        // Using little-endian byte order as per SMBUtil.readInt2
        byte[] buf = new byte[12];
        buf[0] = 0x34; // Low byte
        buf[1] = 0x12; // High byte
        int written = resp.readParameterWordsWireFormat(buf, 0);

        assertEquals(8, written, "Expected readParameterWordsWireFormat to advance 8 bytes");

        return java.util.stream.Stream.of(Arguments.of(0x00000000, new byte[] { 0x00, 0x00, 0x00, 0x00 }),
                Arguments.of(0x12345678, new byte[] { 0x78, 0x56, 0x34, 0x12 }),
                Arguments.of(0xFFFFFFFF, new byte[] { (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF }),
                Arguments.of(0x7FFFFFFF, new byte[] { (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0x7F }));
    }

    assertThat(Ints.toByteArray(0x12131415)).isEqualTo(new byte[] {0x12, 0x13, 0x14, 0x15});
    assertThat(Ints.toByteArray(0xFFEEDDCC))
        .isEqualTo(new byte[] {(byte) 0xFF, (byte) 0xEE, (byte) 0xDD, (byte) 0xCC});
  }

  public void testFromByteArray() {
    assertThat(Ints.fromByteArray(new byte[] {0x12, 0x13, 0x14, 0x15, 0x33})).isEqualTo(0x12131415);

        int len = cmd.writeParametersWireFormat(buffer, 0);
        assertTrue(len >= 2);
        // writeInt2 writes in little-endian format (LSB first)
        assertEquals(0xAB, buffer[0] & 0xFF);
        assertEquals(0x12, buffer[1] & 0xFF);
        // Check that the path is written after the referral level
        // The path should be written starting at index 2
        // writeString adds null terminator

     *
     * @throws SmbException if the SID string is invalid
     */
    @Test
    void testStringConstructorWithHex() throws SmbException {
        SID sid = new SID("S-1-0x12-21-1");
        assertEquals(1, sid.revision);
        assertEquals(0x12, sid.identifier_authority[5]);
        assertEquals(2, sid.sub_authority_count);
        assertEquals(21, sid.sub_authority[0]);
        assertEquals(1, sid.sub_authority[1]);
    }