private final Queue<T> queue;

    UnIterableQueue(Queue<T> queue) {
      this.queue = queue;
    }

    @Override
    public Iterator<T> iterator() {
      throw new UnsupportedOperationException();
    }

    @Override
    protected Queue<T> delegate() {
      return queue;
    }
  }

  public void testIndexOf_empty() {

import java.util.Queue;
import org.jspecify.annotations.NullMarked;
import org.jspecify.annotations.Nullable;

/**
 * Creates queues, containing sample elements, to be tested.
 *
 * @author Jared Levy
 */
@GwtCompatible
@NullMarked
public interface TestQueueGenerator<E extends @Nullable Object> extends TestCollectionGenerator<E> {
  @Override
  Queue<E> create(Object... elements);

      }
    }
  }

  /** Invokes {@code queue.}{@link BlockingQueue#take() take()} uninterruptibly. */
  @J2ktIncompatible
  @GwtIncompatible // concurrency
  public static <E> E takeUninterruptibly(BlockingQueue<E> queue) {
    boolean interrupted = false;
    try {
      while (true) {
        try {
          return queue.take();
        } catch (InterruptedException e) {

import java.util.Queue;
import org.jspecify.annotations.NullMarked;
import org.jspecify.annotations.Nullable;

/**
 * Creates queues, containing sample elements, to be tested.
 *
 * @author Jared Levy
 */
@GwtCompatible
@NullMarked
public interface TestQueueGenerator<E extends @Nullable Object> extends TestCollectionGenerator<E> {
  @Override
  Queue<E> create(Object... elements);

import static java.util.Arrays.asList;

import java.lang.reflect.Method;
import java.util.Collection;
import java.util.List;
import java.util.Queue;
import junit.framework.Test;

/**
 * Tests the {@link Queue} implementations of {@link java.util}, suppressing tests that trip known
 * OpenJDK 6 bugs.
 *
 * @author Kevin Bourrillion
 */
@AndroidIncompatible // test-suite builders

    /**
     * Maximum size of the thumbnail generation task queue.
     */
    protected int thumbnailTaskQueueSize = 10000;

    /**
     * Number of tasks to process in bulk operations.
     */
    protected int thumbnailTaskBulkSize = 100;

    /**
     * Timeout in milliseconds for thumbnail task queue operations.
     */
    protected long thumbnailTaskQueueTimeout = 10 * 1000L;

   */
  @Throws(SSLPeerUnverifiedException::class)
  override fun clean(
    chain: List<Certificate>,
    hostname: String,
  ): List<Certificate> {
    val queue: Deque<Certificate> = ArrayDeque(chain)
    val result = mutableListOf<Certificate>()
    result.add(queue.removeFirst())
    var foundTrustedCertificate = false

    followIssuerChain@
    for (c in 0 until MAX_SIGNERS) {

import com.google.errorprone.annotations.CanIgnoreReturnValue;
import java.util.ArrayList;
import java.util.List;

/**
 * Creates, based on your criteria, a JUnit test suite that exhaustively tests a queue
 * implementation.
 *
 * @author Jared Levy
 */
@GwtIncompatible
public final class QueueTestSuiteBuilder<E>
    extends AbstractCollectionTestSuiteBuilder<QueueTestSuiteBuilder<E>, E> {

    private final Queue<AuditEntry> auditEntryPool = new ConcurrentLinkedQueue<>();
    private final Queue<StringBuilder> stringBuilderPool = new ConcurrentLinkedQueue<>();
    private final Queue<HashMap<String, Object>> mapPool = new ConcurrentLinkedQueue<>();

    // Asynchronous logging
    private final BlockingQueue<AuditEntry> logQueue = new LinkedBlockingQueue<>(10000); // Bounded queue

    }

    /**
     * Creates and returns a new instance of {@link ArrayBlockingQueue}.
     *
     * @param <E> the element type of {@link ArrayBlockingQueue}
     * @param capacity the queue capacity
     * @param fair whether the queue is fair
     * @return a new instance of {@link ArrayBlockingQueue}
     * @see ArrayBlockingQueue#ArrayBlockingQueue(int, boolean)
     */