The `TestClient` is based on <a href="https://www.python-httpx.org" class="external-link" target="_blank">HTTPX</a>, and luckily, we can use it directly to test the API.

## Example

 *
 * @author George van den Driessche
 */
@GwtCompatible
@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
@SuppressWarnings("JUnit4ClassUsedInJUnit3")
public class CollectionRemoveTester<E> extends AbstractCollectionTester<E> {
  @CollectionFeature.Require(SUPPORTS_REMOVE)
  @CollectionSize.Require(absent = ZERO)
  public void testRemove_present() {
    int initialSize = collection.size();

import static com.google.common.truth.Truth.assertThat;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

/** Tests for {@link ImmutableValueGraph} . */
@RunWith(JUnit4.class)
public class ImmutableValueGraphTest {

  @Test
  public void immutableValueGraph() {
    MutableValueGraph<String, Integer> mutableValueGraph = ValueGraphBuilder.directed().build();
    mutableValueGraph.addNode("A");

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.es.config.exentity;

import org.codelibs.fess.es.config.bsentity.BsBoostDocumentRule;

/**
 * @author FreeGen
 */
public class BoostDocumentRule extends BsBoostDocumentRule {

    private static final long serialVersionUID = 1L;

    public String getId() {
        return asDocMeta().id();
    }

    public void setId(final String id) {

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.es.config.exentity;

import org.codelibs.fess.es.config.bsentity.BsFailureUrl;

/**
 * @author FreeGen
 */
public class FailureUrl extends BsFailureUrl {

    private static final long serialVersionUID = 1L;

    public String getId() {
        return asDocMeta().id();
    }

    public void setId(final String id) {

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.es.config.exentity;

import org.codelibs.fess.es.config.bsentity.BsKeyMatch;

/**
 * @author FreeGen
 */
public class KeyMatch extends BsKeyMatch {

    private static final long serialVersionUID = 1L;

    public String getId() {
        return asDocMeta().id();
    }

    public void setId(final String id) {

import org.lastaflute.di.core.customizer.ComponentCustomizer;
import org.lastaflute.di.core.meta.impl.InstanceDefFactory;
import org.lastaflute.di.naming.NamingConvention;

/**
 * @author shinsuke
 */
public class PagerCreator extends ComponentCreatorImpl {
    public static final String SUFFIX = "Pager";

    public PagerCreator(final NamingConvention namingConvention) {
        super(namingConvention);
        setNameSuffix(SUFFIX);

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.exception;

import org.codelibs.fess.crawler.exception.CrawlingAccessException;

public class DataStoreCrawlingException extends CrawlingAccessException {

    private static final long serialVersionUID = 1L;

    private final String url;

    private final boolean abort;

 * limitations under the License.
 */
package okhttp3

/**
 * Versions of TLS that can be offered when negotiating a secure socket. See
 * [javax.net.ssl.SSLSocket.setEnabledProtocols].
 */
enum class TlsVersion(
  @get:JvmName("javaName") val javaName: String,
) {
  TLS_1_3("TLSv1.3"), // 2016.
  TLS_1_2("TLSv1.2"), // 2008.
  TLS_1_1("TLSv1.1"), // 2006.
  TLS_1_0("TLSv1"), // 1999.
  SSL_3_0("SSLv3"), // 1996.

import okio.Buffer
import okio.Sink

/**
 * A sink that sleeps [periodDelayNanos] every [bytesPerPeriod] bytes. Unlike [okio.Throttler],
 * this permits any interval to be used.
 */
internal class ThrottledSink(
  private val delegate: Sink,
  private val bytesPerPeriod: Long,
  private val periodDelayNanos: Long,
) : Sink by delegate {
  private var bytesWrittenSinceLastDelay = 0L

  override fun write(