close(reqStarted)
				// Just wait for it to cancel.
				for blockResp {
					select {
					case <-ctx.Done():
						close(serverCanceled)
						return NewRemoteErr(ctx.Err())
					case resp <- []byte{1}:
						time.Sleep(10 * time.Millisecond)
					}
				}
				// Just wait for it to cancel.
				<-ctx.Done()
				close(serverCanceled)

				// there is something in the log queue
				// process it first, even if we tickered
				// first, or we have not received any events
				// yet, still wait on it.
				continue
			}

			// If we are doing batching, we should wait
			// at least for a second, before sending.
			// Even if there is nothing in the queue.
			if h.batchSize > 1 && time.Since(lastBatchProcess) < time.Second {
				continue

    public void testExpiration() {
        // Set a very short max age
        entry.setMaxAge(100); // 100ms

        assertFalse(entry.isExpired());
        assertFalse(entry.needsRefresh());

        // Wait for expiration
        try {
            Thread.sleep(150);
        } catch (InterruptedException e) {
            // Ignore
        }

        assertTrue(entry.isExpired());

	if lens == 0 {
		// If the number is 0, it means there are no statements stored in the LRU cache.
		// The test fails and an error message is output.
		t.Fatalf("lru should not be empty")
	}
	// Wait for 40 seconds to give the statements in the cache enough time to expire.
	time.Sleep(time.Second * 40)
	// Assert whether the connection pool of tx is successfully converted to the *gorm.PreparedStmtDB type.

        }
        return values;
    }

    /**
     * Sets the wait time in milliseconds when the crawler is not running.
     *
     * @param crawlerWaitMillis the wait time in milliseconds
     */
    public void setCrawlerWaitMillis(final long crawlerWaitMillis) {
        this.crawlerWaitMillis = crawlerWaitMillis;
    }

        doNothing().when(mockChannelManager).performChannelBinding(any());

        IOException error = new IOException("Connection failed");
        failover.handleFailure(failedChannel, error);

        // Wait a bit for recovery attempt
        Thread.sleep(100);

        verify(mockChannelManager).createTransport(failedChannel.getLocalInterface(), failedChannel.getRemoteInterface());
    }

    @Test

        assertFalse(channelInfo.isHealthy());
    }

    @Test
    void testActivityTracking() {
        long initialTime = channelInfo.getLastActivityTime();

        // Wait a bit and update activity
        try {
            Thread.sleep(10);
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
        }

        channelInfo.updateActivity();

      lock.lock();
      try {
        locked.countDown();
        finishLatch.await(1, MINUTES);
      } catch (InterruptedException e) {
        fail(e.toString());
      } finally {
        lock.unlock();
      }
    }

    void waitUntilHoldingLock() throws InterruptedException {
      locked.await(1, MINUTES);
    }

    void releaseLockAndFinish() throws InterruptedException {

			if formats[index] == nil {
				return errDiskNotFound
			}
			return saveFormatErasure(storageDisks[index], formats[index], "")
		}, index)
	}

	// Wait for the routines to finish.
	return reduceWriteQuorumErrs(ctx, g.Wait(), nil, len(storageDisks))
}

// relinquishes the underlying connection for all storage disks.
func closeStorageDisks(storageDisks ...StorageAPI) {
	var wg sync.WaitGroup

Dans cet exemple, la fonction de tâche écrira dans un fichier (afin de simuler un envoi d'email).

L'opération d'écriture n'utilisant ni `async` ni `await`, on définit la fonction avec un `def` normal.

{* ../../docs_src/background_tasks/tutorial001.py hl[6:9] *}

## Ajouter une tâche d'arrière-plan