}
	for i, wt := range writeTests {
		testReadFile(t, r.File[i], &wt)
	}
}

func TestWriterFlush(t *testing.T) {
	var buf bytes.Buffer
	w := NewWriter(struct{ io.Writer }{&buf})
	_, err := w.Create("foo")
	if err != nil {
		t.Fatal(err)
	}
	if buf.Len() > 0 {
		t.Fatalf("Unexpected %d bytes already in buffer", buf.Len())
	}
	if err := w.Flush(); err != nil {
		t.Fatal(err)
	}

Для примера нам нужен наиболее простой способ, который позволит сосредоточиться на серверной части веб‑сокетов и получить рабочий код:

{* ../../docs_src/websockets/tutorial001_py39.py hl[2,6:38,41:43] *}

## Создание `websocket` { #create-a-websocket }

Создайте `websocket` в своем **FastAPI** приложении:

{* ../../docs_src/websockets/tutorial001_py39.py hl[1,46:47] *}

/// note | Технические детали

		return
	}

	// Validate the transition storage ARNs
	if err = validateTransitionTier(bucketLifecycle); err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

	// Create a map of updated set of rules in request
	updatedRules := make(map[string]lifecycle.Rule, len(bucketLifecycle.Rules))
	for _, rule := range bucketLifecycle.Rules {
		updatedRules[rule.ID] = rule
	}

      {{- if and .Values.securityContext.enabled .Values.persistence.enabled }}
      securityContext:
        {{- omit .Values.securityContext "enabled" | toYaml | nindent 8 }}
      {{- end }}
      {{- if .Values.serviceAccount.create }}
      serviceAccountName: {{ .Values.serviceAccount.name }}
      {{- end }}
      containers:
        - name: {{ .Chart.Name }}
          image: {{ .Values.image.repository }}:{{ .Values.image.tag }}

        this.log = log;
    }

    /**
     * <p>
     * Returns the logger that has been injected into this mojo. If no logger has been set up yet, a
     * <code>SystemStreamLog</code> logger will be created and returned.
     * </p>
     * <strong>Note:</strong>
     * The logger returned by this method must not be cached in an instance field during the construction of the mojo.

    subprocess.run(["git", "push", "origin", branch_name], check=True)
    logging.info("Creating PR")
    pr = repo.create_pull(title=message, body=message, base="master", head=branch_name)
    logging.info(f"Created PR: {pr.number}")
    logging.info("Finished")


if __name__ == "__main__":

    // it's all encapsulated here so it appears normalized to the POM builder.

    // We are going to take the project packaging and find all plugin in the default lifecycle and create
    // fully populated Plugin objects, including executions with goals and default configuration taken
    // from the plugin.xml inside a plugin.
    //

{* ../../docs_src/background_tasks/tutorial001_py39.py hl[1,13] *}

**FastAPI** создаст объект типа `BackgroundTasks` для вас и передаст его через этот параметр.

## Создание функции для фоновой задачи { #create-a-task-function }

Создайте функцию, которую нужно запустить как фоновую задачу.

Это обычная функция, которая может принимать параметры.

///

## Criar um middleware { #create-a-middleware }

Para criar um middleware, use o decorador `@app.middleware("http")` logo acima de uma função.

A função middleware recebe:

* A `request`.

func (p *JSONPool[T]) NewJSONWith(val *T) *JSON[T] {
	var j JSON[T]
	j.p = p
	j.val = val
	return &j
}

// Value returns the underlying value.
// If not set yet, a new value is created.
func (j *JSON[T]) Value() *T {
	if j.val == nil {
		j.val = j.p.new()
	}
	return j.val
}

// ValueOrZero returns the underlying value.
// If the underlying value is nil, a zero value is returned.