* 📝 Update includes in `docs/en/docs/tutorial/path-params-numeric-validations.md`. PR [#12825](https://github.com/fastapi/fastapi/pull/12825) by [@zhaohan-dong](https://github.com/zhaohan-dong).

  }

  fun assertPing(payload: ByteString) {
    assertThat(nextEvent()).isEqualTo(Ping(payload))
  }

  fun assertPong(payload: ByteString) {
    assertThat(nextEvent()).isEqualTo(Pong(payload))
  }

  fun assertClosing(
    code: Int,
    reason: String,
  ) {
    assertThat(nextEvent()).isEqualTo(Closing(code, reason))
  }

  fun assertClosed(
    code: Int,

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        .add("ping:  pong  ") // Value whitespace is trimmed.
        .add("kit:kat") // Space after colon is not required.
        .build()
    assertThat(headers.values("foo")).containsExactly("bar", "baz", "bak")
    assertThat(headers.values("key")).containsExactly("value")
    assertThat(headers.values("ping")).containsExactly("pong")
    assertThat(headers.values("kit")).containsExactly("kat")
  }

		return
	}
	// Single calls do not support pinging.
	if v, ok := c.inStream.Load(m.MuxID); ok {
		pong := v.ping(m.Seq)
		pong.T = ping.T
		gridLogIf(ctx, c.queueMsg(m, &pong))
	} else {
		pong := pongMsg{NotFound: true, T: ping.T}
		gridLogIf(ctx, c.queueMsg(m, &pong))
	}
}

func (c *Connection) handleDisconnectClientMux(m message) {
	if v, ok := c.outgoing.Load(m.MuxID); ok {

import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
import org.jspecify.annotations.NullUnmarked;

/**
 * Benchmarks for {@link CycleDetectingLockFactory}.
 *
 * @author Darick Tong
 */
@NullUnmarked
public class CycleDetectingLockFactoryBenchmark {

  @Param({"2", "3", "4", "5", "10"})
  int lockNestingDepth;

  CycleDetectingLockFactory factory;
  private Lock[] plainLocks;

    peer.acceptFrame() // DEGRADED PING
    peer.acceptFrame() // AWAIT PING
    peer.sendFrame().ping(true, Http2Connection.DEGRADED_PING, 1) // DEGRADED PONG
    peer.sendFrame().ping(true, Http2Connection.AWAIT_PING, 0) // AWAIT PONG
    peer.play()

    // Play it back.
    val connection = connect(peer)
    val stream = connection.newStream(headerEntries("b", "banana"), false)

	case m.outBlock <- struct{}{}:
	default:
		gridLogIf(m.ctx, errors.New("output unblocked overflow"))
	}
}

func (m *muxClient) pong(msg pongMsg) {
	if msg.NotFound || msg.Err != nil {
		err := errors.New("remote terminated call")
		if msg.Err != nil {
			err = fmt.Errorf("remove pong failed: %v", &msg.Err)
		}
		m.addResponse(Response{Err: err})
		return
	}
	atomic.StoreInt64(&m.LastPong, time.Now().UnixNano())

  url: https://github.com/kantandane
zhaohan-dong:
  login: zhaohan-dong
  count: 11
  avatarUrl: https://avatars.githubusercontent.com/u/65422392?u=8260f8781f50248410ebfa4c9bf70e143fe5c9f2&v=4
  url: https://github.com/zhaohan-dong
mariacamilagl:
  login: mariacamilagl
  count: 9

import java.util.concurrent.locks.ReentrantReadWriteLock;
import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;

/**
 * Unittests for {@link CycleDetectingLockFactory}.
 *
 * @author Darick Tong
 */
@NullUnmarked
@GwtIncompatible
@J2ktIncompatible
public class CycleDetectingLockFactoryTest extends TestCase {

  private ReentrantLock lockA;
  private ReentrantLock lockB;
  private ReentrantLock lockC;