@Override
    public boolean usingProxy() {
        return connection.usingProxy();
    }

    @Override
    public InputStream getErrorStream() {
        try {
            handshake();
        } catch (final IOException ex) {}
        return connection.getErrorStream();
    }

    private int parseResponseCode() throws IOException {
        try {

            return null;
        }

        @Override
        public InputStream getInputStream() {
            return inputStream;
        }

        @Override
        public InputStream getErrorStream() {
            return null;
        }

        @Override
        public int waitFor() throws InterruptedException {
            return 0;
        }

        @Override

    }

    @Override
    public boolean usingProxy() {
        return this.connection.usingProxy();
    }

    @Override
    public InputStream getErrorStream() {
        handshake();
        return this.connection.getErrorStream();
    }

    private int parseResponseCode() throws IOException {
        try {
            final String response = this.connection.getHeaderField(0);

                    } else {
                        if (GZIP.equals(con.getContentEncoding())) {
                            return new GZIPInputStream(con.getErrorStream());
                        } else {
                            return con.getErrorStream();
                        }
                    }
                } catch (IOException e) {

                when(conn.getHeaderField(index++)).thenReturn(entry.getValue().get(0));
            }
        }

        if (code >= 400 && stream != null) {
            when(conn.getErrorStream()).thenReturn(stream);
        } else if (stream != null) {
            when(conn.getInputStream()).thenReturn(stream);
        }
    }

    /**

                }
            }, "ProcessCloser-input-" + sessionId).start();
            new Thread(() -> {
                try {
                    CloseableUtil.closeQuietly(process.getErrorStream());
                } catch (final Exception e) {
                    logger.warn("Could not close a process error stream.", e);
                } finally {
                    latch.countDown();
                }

                    }
                });
                CommonPoolUtil.execute(() -> {
                    try {
                        CloseableUtil.closeQuietly(p.getErrorStream());
                    } catch (final Exception e) {
                        logger.warn("Could not close a process error stream.", e);
                    }
                });

            return null;
        }

        @Override
        public java.io.InputStream getInputStream() {
            return null;
        }

        @Override
        public java.io.InputStream getErrorStream() {
            return null;
        }
    }

    private static class TestInputStreamThread extends InputStreamThread {
        private final String output;

        @Override
        public java.io.InputStream getInputStream() {
            return new java.io.ByteArrayInputStream(new byte[0]);
        }

        @Override
        public java.io.InputStream getErrorStream() {
            return new java.io.ByteArrayInputStream(new byte[0]);
        }
    }

    private static class TestInputStreamThread extends InputStreamThread {
        private final String output;

            return null;
        }

        @Override
        public java.io.InputStream getInputStream() {
            return null;
        }

        @Override
        public java.io.InputStream getErrorStream() {
            return null;
        }
    }

    // Mock FessConfig implementation
    private class MockFessConfig extends TestFessConfig {
        private static final long serialVersionUID = 1L;