public void testIsWellFormed_4BytesSamples() {
    // Valid 4 byte.
    assertWellFormed(0xF0, 0xA4, 0xAD, 0xA2);
    // Bad trailing bytes
    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. */

        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);

        void testDcerpcConcMpx() {
            assertEquals(0x10, DcerpcConstants.DCERPC_CONC_MPX, "DCERPC_CONC_MPX should be 0x10");
        }

        @Test
        @DisplayName("DCERPC_DID_NOT_EXECUTE should have correct value")
        void testDcerpcDidNotExecute() {
            assertEquals(0x20, DcerpcConstants.DCERPC_DID_NOT_EXECUTE, "DCERPC_DID_NOT_EXECUTE should be 0x20");
        }

        @Test

        byte[] wireData = new byte[] { 0x10, 0x00, // StructureSize (must be 16)
                0x01, // ShareType (DISK)
                0x00, // Reserved
                0x01, 0x00, 0x00, 0x00, // ShareFlags
                0x08, 0x00, 0x00, 0x00, // Capabilities
                (byte) 0xFF, 0x01, 0x1F, 0x00 // MaximalAccess
        };

        // When

          when {
            b == 0x80 -> {
              // 10000000
              throw IOException("index == 0")
            }
            b and 0x80 == 0x80 -> {
              // 1NNNNNNN
              val index = readInt(b, PREFIX_7_BITS)
              readIndexedHeader(index - 1)
            }
            b == 0x40 -> {
              // 01000000

        // Bit 2: active (1)
        // Bit 1: permanent (1)

        // MAC address
        byte[] testMac = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
        System.arraycopy(testMac, 0, src, srcIndex + 19, 6);

        // Statistics
        byte[] stats = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
        System.arraycopy(stats, 0, src, srcIndex + 25, 6);

        response.readRDataWireFormat(src, srcIndex);

     */
    int FLAGS_PATH_NAMES_CANONICALIZED = 0x10;
    /**
     * Opportunistic lock requested or granted flag.
     */
    int FLAGS_OPLOCK_REQUESTED_OR_GRANTED = 0x20;
    /**
     * Notify client of any action which modified the file flag.
     */
    int FLAGS_NOTIFY_OF_MODIFY_ACTION = 0x40;
    /**
     * Message is a response from server flag.
     */
    int FLAGS_RESPONSE = 0x80;

    /**

     * Context flag for delegation capability
     */
    public static final int DELEGATION = 0x80;
    /**
     * Context flag for mutual authentication requirement
     */
    public static final int MUTUAL_AUTHENTICATION = 0x40;
    /**
     * Context flag for replay detection capability
     */
    public static final int REPLAY_DETECTION = 0x20;
    /**
     * Context flag for sequence checking capability
     */

        void testGlobalCapPersistentHandles() {
            assertEquals(0x10, Smb2Constants.SMB2_GLOBAL_CAP_PERSISTENT_HANDLES, "Persistent handles capability must be 0x10");
        }

        @Test
        @DisplayName("Directory leasing capability should be 0x20")
        void testGlobalCapDirectoryLeasing() {

        assertEquals(0x8, Smb2ChangeNotifyRequest.FILE_NOTIFY_CHANGE_SIZE);
        assertEquals(0x10, Smb2ChangeNotifyRequest.FILE_NOTIFY_CHANGE_LAST_WRITE);
        assertEquals(0x20, Smb2ChangeNotifyRequest.FILE_NOTIFY_CHANGE_LAST_ACCESS);
        assertEquals(0x40, Smb2ChangeNotifyRequest.FILE_NOTIFY_CHANGE_CREATION);
        assertEquals(0x80, Smb2ChangeNotifyRequest.FILE_NOTIFY_CHANGE_EA);