* **Uvicorn**:
    * Tendrá el mejor rendimiento, ya que no tiene mucho código extra aparte del propio servidor.

Y cuando devuelves una `Response`, **FastAPI** la pasará directamente.

No hará ninguna conversión de datos con modelos Pydantic, no convertirá el contenido a ningún tipo, etc.

Esto te da mucha flexibilidad. Puedes devolver cualquier tipo de dato, sobrescribir cualquier declaración de datos o validación, etc.

## Usando el `jsonable_encoder` en una `Response`

                },
            ]
        }
    )


def test_users_token_monica_with_no_jessica(client: TestClient):
    response = client.get("/users?token=monica")
    assert response.status_code == 400
    assert response.json() == {"detail": "No Jessica token provided"}


def test_items_token_jessica(client: TestClient):
    response = client.get(

                },
            ]
        }
    )


@needs_py39
def test_users_token_monica_with_no_jessica(client: TestClient):
    response = client.get("/users?token=monica")
    assert response.status_code == 400
    assert response.json() == {"detail": "No Jessica token provided"}


@needs_py39
def test_items_token_jessica(client: TestClient):
    response = client.get(

    response = client.post("/token", data={"username": "foo", "password": "secret"})
    assert response.status_code == 400, response.text
    assert response.json() == {"detail": "Incorrect username or password"}


def test_no_token():
    response = client.get("/users/me")
    assert response.status_code == 401, response.text
    assert response.json() == {"detail": "Not authenticated"}
    assert response.headers["WWW-Authenticate"] == "Bearer"

    response = client.post("/login/", data={"username": "Foo", "password": "secret"})
    assert response.status_code == 200
    assert response.json() == {"username": "Foo"}


def test_post_body_form_no_password(client: TestClient):
    response = client.post("/login/", data={"username": "Foo"})
    assert response.status_code == 422
    assert response.json() == IsDict(
        {
            "detail": [
                {

4. Установите библиотеки перечисленные в файле с зависимостями.

    Опция `--no-cache-dir` указывает `pip` не сохранять загружаемые библиотеки на локальной машине для использования их в случае повторной загрузки. В контейнере, в случае пересборки этого шага, они всё равно будут удалены.

    !!! note "Заметка"
        Опция `--no-cache-dir` нужна только для `pip`, она никак не влияет на Docker или контейнеры.

from fastapi.testclient import TestClient


@pytest.fixture(name="client")
def get_client():
    from docs_src.dependencies.tutorial008d_an import app

    client = TestClient(app)
    return client


def test_get_no_item(client: TestClient):
    response = client.get("/items/foo")
    assert response.status_code == 404, response.text
    assert response.json() == {"detail": "Item not found, there's only a plumbus here"}

    `OAuth2PasswordRequestForm` is that `OAuth2PasswordRequestFormStrict` requires the
    client to send the form field `grant_type` with the value `"password"`, which
    is required in the OAuth2 specification (it seems that for no particular reason),
    while for `OAuth2PasswordRequestForm` `grant_type` is optional.

    Read more about it in the

from dirty_equals import IsDict
from fastapi.testclient import TestClient

from docs_src.dependencies.tutorial012_an import app

client = TestClient(app)


def test_get_no_headers_items():
    response = client.get("/items/")
    assert response.status_code == 422, response.text
    assert response.json() == IsDict(
        {
            "detail": [
                {
                    "type": "missing",