# Tests Asíncronos { #async-tests }

Ya has visto cómo probar tus aplicaciones de **FastAPI** usando el `TestClient` proporcionado. Hasta ahora, solo has visto cómo escribir tests sincrónicos, sin usar funciones `async`.

	ROLL $1, (BX)                           // d103
	ROLL $1, (R11)                          // 41d103
	ROLL $1, DX                             // d1c2
	ROLL $1, R11                            // 41d1c3
	ROLL CL, (BX)                           // d303
	ROLL CL, (R11)                          // 41d303
	ROLL CL, DX                             // d3c2
	ROLL CL, R11                            // 41d3c3

```JSON
{
  "detail": "Item not found"
}
```

/// tip | Consejo

Cuando lanzas un `HTTPException`, puedes pasar cualquier valor que pueda convertirse a JSON como el parámetro `detail`, no solo `str`.

Podrías pasar un `dict`, un `list`, etc.

Son manejados automáticamente por **FastAPI** y convertidos a JSON.

///

## Agrega headers personalizados { #add-custom-headers }

# FastAPI Cloud { #fastapi-cloud }

Puedes desplegar tu app de FastAPI en <a href="https://fastapicloud.com" class="external-link" target="_blank">FastAPI Cloud</a> con un solo comando; ve y únete a la lista de espera si aún no lo has hecho. 🚀

## Iniciar sesión { #login }

Asegúrate de que ya tienes una cuenta de **FastAPI Cloud** (te invitamos desde la lista de espera 😉).

Luego inicia sesión:

<div class="termy">

```console
$ fastapi login

$ pip install python-multipart
```

///

/// note | Nota

Esto es compatible desde la versión `0.113.0` de FastAPI. 🤓

///

## Modelos de Pydantic para Formularios { #pydantic-models-for-forms }

Solo necesitas declarar un **modelo de Pydantic** con los campos que quieres recibir como **campos de formulario**, y luego declarar el parámetro como `Form`:

{* ../../docs_src/request_form_models/tutorial001_an_py39.py hl[9:11,15] *}

    while (added < numElements) {
      // we could rely solely on #poll, but #drainTo might be more efficient when there are multiple
      // elements already available (e.g. LinkedBlockingQueue#drainTo locks only once)
      added += q.drainTo(buffer, numElements - added);
      if (added < numElements) { // not enough elements immediately available; will have to poll
        E e = q.poll(deadline - System.nanoTime(), NANOSECONDS);
        if (e == null) {

of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all

of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all

of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all

	SLL	$14, R5              // 0557a0e1
	SLL	$15, R5              // 8557a0e1
	SLL	$30, R5              // 055fa0e1
	SLL	$31, R5              // 855fa0e1
	SLL.S	$14, R5              // 0557b0e1
	SLL.S	$15, R5              // 8557b0e1
	SLL.S	$30, R5              // 055fb0e1
	SLL.S	$31, R5              // 855fb0e1
	SLL	R5, R6, R7           // 1675a0e1
	SLL.S	R5, R6, R7           // 1675b0e1
	SLL	R5, R7               // 1775a0e1