Longs.toByteArray(0x1213141516171819L));
    assertByteArrayEquals(
        new byte[] {
          (byte) 0xFF, (byte) 0xEE, (byte) 0xDD, (byte) 0xCC,
          (byte) 0xBB, (byte) 0xAA, (byte) 0x99, (byte) 0x88
        },
        Longs.toByteArray(0xFFEEDDCCBBAA9988L));
  }

  public void testFromByteArray() {
    assertThat(

    void testLargeDataSize() throws CIFSException {
        // Create a large data array
        byte[] largeData = new byte[1024];
        Arrays.fill(largeData, (byte) 0xFF);

        byte[] avPairData = createAvPairData(0x99, largeData);
        byte[] eolData = createEolData();

        byte[] fullData = new byte[avPairData.length + eolData.length];
        System.arraycopy(avPairData, 0, fullData, 0, avPairData.length);

            notification.readBytesWireFormat(buffer1, 0);

            // Second read with different values
            byte[] fileId2 = new byte[16];
            Arrays.fill(fileId2, (byte) 0x99);
            byte[] buffer2 = createValidOplockBreakBuffer((byte) 0x08, fileId2);
            notification.readBytesWireFormat(buffer2, 0);

            // Verify second read overwrote first read values

    private static final short TIME_HI_AND_VERSION = (short) 0x6677;
    private static final byte CLOCK_SEQ_HI_AND_RESERVED = (byte) 0x88;
    private static final byte CLOCK_SEQ_LOW = (byte) 0x99;
    private static final byte[] NODE = { (byte) 0xAA, (byte) 0xBB, (byte) 0xCC, (byte) 0xDD, (byte) 0xEE, (byte) 0xFF };

    @Nested
    @DisplayName("Constructor Tests")
    class ConstructorTests {

        @Test

        int readDataAvailable = 256;
        int numberOfMessages = 5;
        int messageLength = 128;
        byte[] testData = { (byte) 0xFF, (byte) 0xEE, (byte) 0xDD, (byte) 0xCC, (byte) 0xBB, (byte) 0xAA, (byte) 0x99, (byte) 0x88 };

        // Write values to buffer at offset
        SMBUtil.writeInt4(namedPipeState, buffer, bufferIndex);
        SMBUtil.writeInt4(readDataAvailable, buffer, bufferIndex + 4);

        // Random but realistic GUID
        byte[] testGuid = { (byte) 0x01, (byte) 0x23, (byte) 0x45, (byte) 0x67, (byte) 0x89, (byte) 0xAB, (byte) 0xCD, (byte) 0xEF,
                (byte) 0xFE, (byte) 0xDC, (byte) 0xBA, (byte) 0x98, (byte) 0x76, (byte) 0x54, (byte) 0x32, (byte) 0x10 };

        // Security mode with signing required
        int testSecurityMode = 0x0003; // SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED

      0x25,
      0x26,
      0x27,
      0x6,
      0x74,
      0x75,
      0x28,
      0x29,
      0x2a,
      0x7,
      0x2b,
      0x76,
      0x2c,
      0x8,
      0x9,
      0x2d,
      0x77,
      0x78,
      0x79,
      0x7a,
      0x7b,
      0x7ffe,
      0x7fc,
      0x3ffd,
      0x1ffd,
      0xffffffc,
      0xfffe6,
      0x3fffd2,

    assertNotWellFormed(0xF0, 0xA4, 0xAD, 0x7F);
    assertNotWellFormed(0xF0, 0xA4, 0xAD, 0xC0);
    // Special cases for byte2
    assertNotWellFormed(0xF0, 0x8F, 0xAD, 0xA2);
    assertNotWellFormed(0xF4, 0x90, 0xAD, 0xA2);
  }

  /** Tests some hard-coded test cases. */
  public void testSomeSequences() {
    // Empty
    assertWellFormed();
    // One-byte characters, including control characters

            originalUuid.time_low = 0x87654321;
            originalUuid.time_mid = (short) 0x4321;
            originalUuid.time_hi_and_version = (short) 0x8765;
            originalUuid.clock_seq_hi_and_reserved = (byte) 0x99;
            originalUuid.clock_seq_low = (byte) 0x88;
            originalUuid.node = new byte[] { (byte) 0x11, (byte) 0x22, (byte) 0x33, (byte) 0x44, (byte) 0x55, (byte) 0x66 };

            // Mock encoding buffer

        byte[] data = new byte[] { 1, 2 };

        // Use a type that's not SESSION_MESSAGE or SESSION_KEEP_ALIVE
        byte[] unknownHeader = new byte[] { (byte) 0x90, 0, 0, 0 };

        byte[] fullData = concat(unknownHeader, // Unknown packet type - will continue to next packet
                messageHeader(2), data);
        InputStream in = new ByteArrayInputStream(fullData);