*     Guava 27.0
 */
public final class InternalFutures {
  /**
   * Usually returns {@code null} but, if the given {@code Future} has failed, may <i>optionally</i>
   * return the cause of the failure. "Failure" means specifically "completed with an exception"; it
   * does not include "was cancelled." To be explicit: If this method returns a non-null value,
   * then:
   *
   * <ul>

    val failure = context.executionException.orElseGet { null }

    if (uncaughtException != null) {
      throw failure + AssertionError("uncaught exception thrown during test", uncaughtException)
    }

    if (context.isFlaky()) {
      logEvents()
    }

    LogManager.getLogManager().reset()

    var result: Throwable? = failure

    try {
      testHttpUrl(testData)
      if (KNOWN_FAILURES.contains(testData.toString())) {
        System.err.println("Expected failure but was success: $testData")
      }
    } catch (e: Throwable) {
      if (KNOWN_FAILURES.contains(testData.toString())) {
        System.err.println("Ignoring known failure: $testData")
        e.printStackTrace()
      } else {
        throw e
      }
    }
  }

            testReconnector.testCreateReconnectionRequest(testHandle);
        });
    }

    /**
     * Test implementation of HandleReconnector that allows controlling success/failure
     */
    private static class TestHandleReconnector extends HandleReconnector {
        private final boolean shouldSucceed;

labels.errorName=Error Name
labels.expiredTime=Expired Time
labels.expires=Expires
labels.failureCountThreshold=Failure Count
labels.fileConfigName=File Crawl Config Name
labels.fileName=File Name
labels.handlerName=Handler Name
labels.handlerParameter=Parameter
labels.handlerScript=Script
labels.popularWord=Popular Word
labels.ignoreFailureType=Ignored Failure Type
labels.lastAccessTime=Last Access Time
labels.notificationTo=Notification To
labels.num=Num

        ChannelInfo channel = new ChannelInfo("failover-test", mockTransport, nic, nic);
        channel.setState(ChannelState.ESTABLISHED);

        // Simulate failure
        IOException failure = new IOException("Connection lost");
        failover.handleFailure(channel, failure);

        // Verify channel state changed
        assertFalse(channel.isHealthy());
        assertEquals(ChannelState.FAILED, channel.getState());
    }

    public String appendQueryParameter;

    /** The login required setting. */
    public String loginRequired;

    /** The ignore failure type setting. */
    public String ignoreFailureType;

    /** The failure count threshold setting. */
    public String failureCountThreshold;

    /** The popular word setting. */
    public String popularWord;

    return super.getName() + '[' + suiteName + ']';
  }

  /**
   * Asserts that the given object is non-null, with a better failure message than {@link
   * TestCase#assertNull(String, Object)}.
   *
   * <p>The {@link TestCase} version (which is from JUnit 3) produces a failure message that does
   * not include the value of the object.
   *
   * @since 33.4.0
   */

          hasBody -> requestBody.buffer.readByteString()
          else -> null
        },
      connectionIndex = connectionIndex,
      exchangeIndex = exchangeIndex,
      socket = socket,
      failure = failure,
    )
  }

  @Throws(IOException::class)
  private fun handleWebSocketUpgrade(
    socket: MockWebServerSocket,
    request: RecordedRequest,
    response: MockResponse,
  ) {

     * <p>If the combiningCallable throws an {@code ExecutionException}, the cause of the thrown
     * {@code ExecutionException} will be extracted and used as the failure of the derived step.
     *
     * <p>If the combiningCallable throws any other exception, it will be used as the failure of the
     * derived step.
     *
     * <p>If an exception is thrown after the combiningCallable creates a {@code ClosingFuture},