.gzip()
        .gzip()
        .build()
    }.also {
      assertThat(it).hasMessage("Content-Encoding already set: gzip")
    }
  }

  @Test
  fun curlGet() {
    val request =
      Request
        .Builder()
        .url("https://example.com")
        .header("Authorization", "Bearer abc123")
        .build()

    val curl = request.toCurl()

import java.util.logging.Level;
import java.util.logging.Logger;

import org.codelibs.curl.Curl.Method;
import org.junit.Test;

public class CurlTest {
    private static final Logger logger = Logger.getLogger(CurlTest.class.getName());

    @Test
    public void test_Get() {
        Curl.get("https://www.codelibs.org/").execute(response -> {

        }
        final Set<RequestData> urlSet = new HashSet<>(docList.size());
        for (final Map<String, Object> doc : docList) {
            final String url = DocumentUtil.getValue(doc, fessConfig.getIndexFieldUrl(), String.class);
            if (StringUtil.isNotBlank(url)) {
                urlSet.add(RequestDataBuilder.newRequestData().get().url(url).build());
            }
        }