* @param settings a settings object.
     * @throws IOException java.io.IOException if any.
     */
    public void write(Writer writer, Settings settings) throws IOException {
        try {
            delegate.write(writer, settings.getDelegate());
        } catch (XMLStreamException e) {
            throw new IOException("Error writing settings to " + writer, e);
        }
    }

    /**

        int i = 0, n;

        while (i < len) {
            n = in.read(b, off + i, len - i);
            if (n <= 0) {
                break;
            }
            i += n;
        }

        return i;
    }

    static int readPacketType(final InputStream in, final byte[] buffer, final int bufferIndex) throws IOException {

  }

  public void testGetClassPathFromManifest_noClassPath() throws IOException {
    File jarFile = new File("base.jar");
    assertThat(ClassPath.getClassPathFromManifest(jarFile, manifest(""))).isEmpty();
  }

  public void testGetClassPathFromManifest_emptyClassPath() throws IOException {
    File jarFile = new File("base.jar");

        }
        throw new IOException();
    }

    /**
     * @param msg
     * @param in
     * @param off
     * @param isDirect
     * @return
     * @throws IOException
     * @throws DcerpcException
     * @throws NdrException
     */
    private byte[] receiveMoreFragments(final DcerpcMessage msg, byte[] in) throws IOException, DcerpcException, NdrException {

     *
     * @param u The URL to open a connection to
     * @return A new S3URLConnection instance
     * @throws IOException If the connection cannot be opened
     */
    @Override
    protected URLConnection openConnection(final URL u) throws IOException {
        return new S3URLConnection(u);
    }

    /**
     * S3URLConnection is a URL connection implementation for accessing S3 objects.

  }

  @Override public ServerSocket createServerSocket() throws IOException {
    return new UnixDomainServerSocket();
  }

  @Override public ServerSocket createServerSocket(int port) throws IOException {
    return createServerSocket();
  }

  @Override public ServerSocket createServerSocket(int port, int backlog) throws IOException {
    return createServerSocket();
  }

    }

    @Override public Socket createSocket(
        Socket socket, String host, int port, boolean autoClose) throws IOException {
      return configureSocket((SSLSocket) delegate.createSocket(socket, host, port, autoClose));
    }

    @Override public Socket createSocket(String host, int port) throws IOException {
      return configureSocket((SSLSocket) delegate.createSocket(host, port));
    }

     *
     * @param in the input stream containing the new mapping file content
     * @throws IOException if an I/O error occurs during the update
     */
    public synchronized void update(final InputStream in) throws IOException {
        try (MappingUpdater updater = new MappingUpdater(null)) {
            reload(updater, in);
        }
    }

    /**

  }

  public void testReadFully() throws IOException {
    DataInput in = new LittleEndianDataInputStream(new ByteArrayInputStream(data));
    byte[] b = new byte[data.length];
    in.readFully(b);
    assertEquals(Bytes.asList(data), Bytes.asList(b));
  }

  public void testReadUnsignedByte_eof() throws IOException {
    DataInput in = new LittleEndianDataInputStream(new ByteArrayInputStream(new byte[0]));

        ASN1InputStream ais = new ASN1InputStream(bais);
        assertThrows(IOException.class, () -> {
            ASN1Util.readUnparsedTagged(2, 10, ais);
        }, "Should throw IOException for unexpected tag");
    }

    // --- readTagNumber ---

    @Test
    void testReadTagNumber_Simple() throws IOException {
        // Simple tag 5
        InputStream s = new ByteArrayInputStream(new byte[] {});