testCases := []struct {
		host        string
		port        int
		expectedErr error
	}{
		{"", port, fmt.Errorf("listen tcp :%v: bind: address already in use", port)},
		{"127.0.0.1", port, fmt.Errorf("listen tcp 127.0.0.1:%v: bind: address already in use", port)},
	}

	for _, testCase := range testCases {
		err := CheckPortAvailability(testCase.host, strconv.Itoa(testCase.port), TCPOptions{})
		switch {

	}

	return errors.New("no local drive found")
}

// rotate rotates the journal. If a read-only journal already exists it does
// nothing. Otherwise renames the active journal to a read-only journal and
// opens a new active journal.
func (jd *tierDiskJournal) rotate() error {
	// Do nothing if a read-only journal file already exists.
	if _, err := os.Stat(jd.ReadOnlyPath()); err == nil {
		return nil
	}

 * header, or they may decline the challenge by returning null. In this case the unauthenticated
 * response will be returned to the caller that triggered it.
 *
 * Implementations should check if the initial request already included an attempt to
 * authenticate. If so it is likely that further attempts will not be useful and the authenticator
 * should give up.
 *

import javax.annotation.CheckForNull;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * A notification of the removal of a single entry. The key and/or value may be null if they were
 * already garbage collected.
 *
 * <p>Like other {@code Entry} instances associated with {@code CacheBuilder}, this class holds
 * strong references to the key and value, regardless of the type of references the cache may be
 * using.

@ElementTypesAreNonnullByDefault
public final class JdkFutureAdapters {
  /**
   * Assigns a thread to the given {@link Future} to provide {@link ListenableFuture} functionality.
   *
   * <p><b>Warning:</b> If the input future does not already implement {@code ListenableFuture}, the
   * returned future will emulate {@link ListenableFuture#addListener} by taking a thread from an
   * internal, unbounded pool at the first call to {@code addListener} and holding it until the

  }

  /**
   * Starts the stopwatch.
   *
   * @return this {@code Stopwatch} instance
   * @throws IllegalStateException if the stopwatch is already running.
   */
  @CanIgnoreReturnValue
  public Stopwatch start() {
    checkState(!isRunning, "This stopwatch is already running.");
    isRunning = true;
    startTick = ticker.read();
    return this;
  }

  /**

		oiArgs.common.revision = ""
	}
	// Error here likely indicates Deployment is missing. If some other K8s error, we will hit it again later.
	already, _ := isControllerInstalled(kubeClient.Kube(), oiArgs.common.operatorNamespace, oiArgs.common.revision)
	if already {
		l.LogAndPrintf("Operator controller is already installed in %s namespace.", oiArgs.common.operatorNamespace)

        return map.containsKey(o);
    }

    /**
     * Adds the specified element to this set if it is not already present.
     *
     * @param o
     *            element to be added to this set.
     * @return true if the set did not already contain the specified
     *         element.
     */
    @Override
    public boolean add(final E o) {
        return map.put(o, PRESENT) == null;

      assertFalse("Listener called more than once", wasCalled());
      calledCountDown.countDown();
    }

    public void expectCall() {
      assertFalse("expectCall is already true", expectCall);
      expectCall = true;
    }

    public boolean wasCalled() {
      return calledCountDown.getCount() == 0;
    }

    public void waitForCall() throws InterruptedException {

# ==============================================================================
if [[ "$TFCI_DOCKER_PULL_ENABLE" == 1 ]]; then
  # Simple retry logic for docker-pull errors. Sleeps for 15s if a pull fails.
  # Pulling an already-pulled container image will finish instantly, so
  # repeating the command costs nothing.
  docker pull "$TFCI_DOCKER_IMAGE" || sleep 15
  docker pull "$TFCI_DOCKER_IMAGE" || sleep 15
  docker pull "$TFCI_DOCKER_IMAGE"
fi