/// tip | Consejo

Nota que las funciones de prueba son `def` normales, no `async def`.

Y las llamadas al cliente también son llamadas normales, sin usar `await`.

Esto te permite usar `pytest` directamente sin complicaciones.

///

/// note | Detalles técnicos

También podrías usar `from starlette.testclient import TestClient`.

/// tip | Подсказка

Обратите внимание, что тестирующая функция является обычной `def`, а не асинхронной `async def`.

И вызов клиента также осуществляется без `await`.

Это позволяет вам использовать `pytest` без лишних усложнений.

///

/// note | Технические детали

Также можно написать `from starlette.testclient import TestClient`.

        var first = true

        override fun createSocket(): Socket {
          if (first) {
            first = false
            firstConnectLatch.await()
          }
          return super.createSocket()
        }
      }

    client =
      client
        .newBuilder()
        .protocols(listOf(Protocol.H2_PRIOR_KNOWLEDGE))

async def slow_async_stream():
    yield {"n": 1}
    # Sleep longer than the (monkeypatched) ping interval so a keepalive
    # comment is emitted before the next item.
    await asyncio.sleep(0.3)
    yield {"n": 2}


@keepalive_app.get("/slow-sync", response_class=EventSourceResponse)
def slow_sync_stream():
    yield {"n": 1}
    time.sleep(0.3)
    yield {"n": 2}

					return
				}
			}

			// All versions resulted in 'ObjectNotFound/VersionNotFound'
			if versionNotFound == len(fivs.Versions) {
				return
			}

			send(healEntryDone(entry.name))

			// Wait and proceed if there are active requests
			waitForLowHTTPReq()
		}

		// How to resolve partial results.
		resolver := metadataResolutionParams{
			dirQuorum: 1,
			objQuorum: 1,
			bucket:    bucket,

    このように、`dataclasses` は標準の型注釈と組み合わせられます。

8. この *path operation 関数* は、`async def` ではなく通常の `def` を使用しています。

    いつもどおり、FastAPI では必要に応じて `def` と `async def` を組み合わせられます。

    どちらをいつ使うかの復習が必要な場合は、[`async` と `await`](../async.md#in-a-hurry) に関するドキュメントの _"In a hurry?"_ セクションを参照してください。

9. この *path operation 関数* は（可能ではありますが）dataclass 自体は返さず、内部データを持つ辞書のリストを返しています。

    FastAPI は dataclass を含む `response_model` パラメータを使ってレスポンスを変換します。

            return "Free up disk space or use a different location";
        case QUOTA:
            return "Contact administrator to increase quota limits";
        case LOCK:
            return "Release existing locks or wait for them to be released";
        case BUFFER:
            return "Reduce buffer usage or increase buffer pool size";
        case THREAD_POOL:
            return "Reduce concurrent operations or increase thread pool size";

2. Start Prometheus server and AlertManager
3. Bring down couple of MinIO instances to bring down the Erasure Set tolerance to -1 and verify the same with `mc admin prometheus metrics ALIAS | grep minio_cluster_health_erasure_set_status`
4. Wait for 5 mins (as alert is configured to be firing after 5 mins), and verify that you see an entry in webhook for the alert as well as in Prometheus console as shown below

```json
{
  "receiver": "web\\.hook",

    try {
      exchange.writeRequestHeaders(request)

      if (hasRequestBody) {
        // If there's a "Expect: 100-continue" header on the request, wait for a "HTTP/1.1 100
        // Continue" response before transmitting the request body. If we don't get that, return
        // what we did get (such as a 4xx response) without ever transmitting the request body.

				// Number of probes.
				// ~ cat /proc/sys/net/ipv4/tcp_keepalive_probes (defaults to 9, we reduce it to 5)
				_ = syscall.SetsockoptInt(fd, syscall.IPPROTO_TCP, syscall.TCP_KEEPCNT, 5)

				// Wait time after successful probe in seconds.
				// ~ cat /proc/sys/net/ipv4/tcp_keepalive_intvl (defaults to 75 secs, we reduce it to 15 secs)
				_ = syscall.SetsockoptInt(fd, syscall.IPPROTO_TCP, syscall.TCP_KEEPINTVL, 15)
			}