@Override
  void readFully(byte[] b, int off, int len);

  // not guaranteed to skip n bytes so result should NOT be ignored
  // use ByteStreams.skipFully or one of the read methods instead
  @Override
  int skipBytes(int n);

  @CanIgnoreReturnValue // to skip a byte
  @Override
  boolean readBoolean();

  @CanIgnoreReturnValue // to skip a byte
  @Override
  byte readByte();

  @CanIgnoreReturnValue // to skip a byte

    }

    @ParameterizedTest
    @ValueSource(longs = { 0L, -1L, -10L })
    @DisplayName("Skip returns 0 for zero or negative values")
    void skipReturnsZeroForNegativeOrZero(long skipBytes) throws IOException {
        // Create message with 5 bytes of data
        byte[] data = new byte[] { 10, 20, 30, 40, 50 };
        InputStream in = new ByteArrayInputStream(concat(messageHeader(5), data));

    ByteStreams.readFully(this, b);
  }

  @Override
  public void readFully(byte[] b, int off, int len) throws IOException {
    ByteStreams.readFully(this, b, off, len);
  }

  @Override
  public int skipBytes(int n) throws IOException {
    return (int) in.skip(n);
  }

  @CanIgnoreReturnValue // to skip a byte
  @Override
  public int readUnsignedByte() throws IOException {
    int b1 = in.read();
    if (b1 < 0) {

        assertEquals(2, calls.get());
    }

    @Test
    @DisplayName("skipBytes(): advances file pointer for positive values")
    void skipBytes_advancesFP() throws Exception {
        SmbRandomAccessFile raf = newInstance("r", false, false, false);
        assertEquals(0L, raf.getFilePointer());
        int skipped = raf.skipBytes(5);
        assertEquals(5, skipped);
        assertEquals(5L, raf.getFilePointer());

                throw new SmbException("EOF");
            }
            n += count;
            fp += count;
        } while (n < len);
    }

    @Override
    public int skipBytes(final int n) throws SmbException {
        if (n > 0) {
            fp += n;
            return n;
        }
        return 0;
    }

    @Override

            if (count < 0) {
                throw new SmbEndOfFileException();
            }
            n += count;
        } while (n < len);
    }

    @Override
    public int skipBytes(final int n) throws SmbException {
        if (n > 0) {
            this.fp += n;
            return n;
        }
        return 0;
    }

    @Override

            final int domainIdPointer = pacStream.readInt();

            // Skip some reserved fields
            pacStream.skipBytes(8);

            this.userAccountControl = pacStream.readInt();

            // Skip some reserved fields
            pacStream.skipBytes(28);

            // Extra SIDs information
            final int extraSidCount = pacStream.readInt();

        // Verify length was set (actual behavior depends on implementation)
    }

    @Test
    void testSkipBytes() throws SmbException {
        int skipAmount = 100;
        int result = smbRandomAccessFile.skipBytes(skipAmount);

        assertEquals(skipAmount, result);
        assertEquals(skipAmount, smbRandomAccessFile.getFilePointer());
    }

    @Test
    void testReadFully() throws SmbException {

    byte[] data = baos.toByteArray();

    DataInput in = new LittleEndianDataInputStream(new ByteArrayInputStream(data));
    int bytesSkipped = 0;
    while (bytesSkipped < 10) {
      bytesSkipped += in.skipBytes(10 - bytesSkipped);
    }

    /* Read in various values in LITTLE ENDIAN FORMAT */
    byte[] b = new byte[2];
    in.readFully(b);
    assertEquals(-100, b[0]);
    assertEquals(100, b[1]);