def test_openapi_schema(client: TestClient):
    response = client.get("/openapi.json")
    assert response.status_code == 200, response.text
    assert response.json() == {
        "openapi": "3.1.0",
        "info": {"title": "FastAPI", "version": "0.1.0"},
        "paths": {
            "/files/": {
                "post": {
                    "summary": "Create Files",
                    "operationId": "create_files_files__post",

        Issuer: CN = consoleAdmin
        Validity
            Not Before: Jul 19 15:08:44 2021 GMT
            Not After : Aug 18 15:08:44 2021 GMT
        Subject: CN = consoleAdmin
        Subject Public Key Info:
            Public Key Algorithm: ED25519
                ED25519 Public-Key:
                pub:
                    5a:91:87:b8:77:fe:d4:af:d9:c7:c7:ce:55:ae:74:

{* ../../docs_src/events/tutorial002_py39.py hl[6] *}

Here, the `shutdown` event handler function will write a text line `"Application shutdown"` to a file `log.txt`.

/// info

In the `open()` function, the `mode="a"` means "append", so, the line will be added after whatever is on that file, without overwriting the previous contents.

///

/// tip

{* ../../docs_src/events/tutorial002_py39.py hl[6] *}

Aqui, a função de manipulador do evento `shutdown` escreverá uma linha de texto `"Application shutdown"` no arquivo `log.txt`.

/// info | Informação

Na função `open()`, o `mode="a"` significa "acrescentar", então a linha será adicionada depois do que já estiver naquele arquivo, sem sobrescrever o conteúdo anterior.

///

/// tip | Dica

Чтобы сделать это, сначала импортируйте:

* `Query` из `fastapi`
* `Annotated` из `typing`

{* ../../docs_src/query_params_str_validations/tutorial002_an_py310.py hl[1,3] *}

/// info | Дополнительная информация

Поддержка `Annotated` (и рекомендация использовать его) появилась в FastAPI версии 0.95.0.

Если у вас более старая версия, при попытке использовать `Annotated` вы получите ошибки.

```

... rend le paramètre optionnel, et est donc équivalent à :

```Python
q: Union[str, None] = None
```

Mais déclare explicitement `q` comme étant un paramètre de requête.

/// info

Gardez à l'esprit que la partie la plus importante pour rendre un paramètre optionnel est :

```Python
= None
```

ou :

```Python
= Query(None)
```

                        .thenReturn(UpgradeResult.empty());

                checkGoal.execute(context);

                // Verify that the Check-specific header is logged
                verify(context.logger).info("Maven Upgrade Tool - Check");
            } finally {
                // Clean up - delete all files in the directory first
                try {
                    Files.walk(tempDir)

## Revisa la Documentación { #check-the-docs }

Puedes ver las cookies definidas en la UI de la documentación en `/docs`:

<div class="screenshot">
<img src="/img/tutorial/cookie-param-models/image01.png">
</div>

/// info | Información

Ten en cuenta que, como los **navegadores manejan las cookies** de maneras especiales y detrás de escenas, **no** permiten fácilmente que **JavaScript** las toque.

* data validation
* data serialization
* data documentation, etc.

This works the same way as with Pydantic models. And it is actually achieved in the same way underneath, using Pydantic.

/// info

Keep in mind that dataclasses can't do everything Pydantic models can do.

So, you might still need to use Pydantic models.

///

Параметр `status_code` принимает число, обозначающее HTTP статус-код.

/// info | Информация