Necesitas importar `WSGIMiddleware`.

Luego envuelve la aplicación WSGI (p. ej., Flask) con el middleware.

Y luego móntala bajo un path.

{* ../../docs_src/wsgi/tutorial001_py39.py hl[2:3,3] *}

## Revisa { #check-it }

Ahora, cada request bajo el path `/v1/` será manejado por la aplicación Flask.

Y el resto será manejado por **FastAPI**.

from fastapi.testclient import TestClient

from docs_src.handling_errors.tutorial003_py39 import app

client = TestClient(app)


def test_get():
    response = client.get("/unicorns/shinny")
    assert response.status_code == 200, response.text
    assert response.json() == {"unicorn_name": "shinny"}


def test_get_exception():
    response = client.get("/unicorns/yolo")
    assert response.status_code == 418, response.text

import importlib

import pytest
from fastapi.testclient import TestClient


@pytest.fixture(
    name="client",
    params=[
        pytest.param("tutorial001_py39"),
        pytest.param("tutorial001_an_py39"),
    ],
)
def get_client(request: pytest.FixtureRequest):
    mod = importlib.import_module(f"docs_src.security.{request.param}")

    client = TestClient(mod.app)
    return client

from fastapi.testclient import TestClient

from docs_src.path_params.tutorial004_py39 import app

client = TestClient(app)


def test_file_path():
    response = client.get("/files/home/johndoe/myfile.txt")
    print(response.content)
    assert response.status_code == 200, response.text
    assert response.json() == {"file_path": "home/johndoe/myfile.txt"}


def test_root_file_path():

import importlib

import pytest
from fastapi.testclient import TestClient


@pytest.fixture(
    name="client",
    params=[
        pytest.param("tutorial001_py39"),
    ],
)
def get_client(request: pytest.FixtureRequest):
    mod = importlib.import_module(f"docs_src.generate_clients.{request.param}")
    client = TestClient(mod.app)
    return client


def test_post_items(client: TestClient):

import importlib

import pytest
from fastapi.testclient import TestClient

from ...utils import needs_py310


@pytest.fixture(
    name="client",
    params=[
        pytest.param("tutorial002_py39"),
        pytest.param("tutorial002_py310", marks=needs_py310),
    ],
)
def get_client(request: pytest.FixtureRequest) -> TestClient:
    mod = importlib.import_module(f"docs_src.separate_openapi_schemas.{request.param}")

from starlette.testclient import TestClient

warnings.filterwarnings(
    "ignore",
    message=r"The 'lia' package has been renamed to 'cross_web'\..*",
    category=DeprecationWarning,
)

from docs_src.graphql_.tutorial001_py39 import app  # noqa: E402


@pytest.fixture(name="client")
def get_client() -> TestClient:
    return TestClient(app)


def test_query(client: TestClient):

## Использование `StaticFiles` { #use-staticfiles }

* Импортируйте `StaticFiles`.
* "Примонтируйте" экземпляр `StaticFiles()` к определённому пути.

{* ../../docs_src/static_files/tutorial001_py39.py hl[2,6] *}

/// note | Технические детали

Вы также можете использовать `from starlette.staticfiles import StaticFiles`.

{* ../../docs_src/dependencies/tutorial007_py39.py hl[2:4] *}

El valor generado es lo que se inyecta en *path operations* y otras dependencias:

{* ../../docs_src/dependencies/tutorial007_py39.py hl[4] *}

El código posterior a la declaración `yield` se ejecuta después del response:

{* ../../docs_src/dependencies/tutorial007_py39.py hl[5:6] *}

/// tip | Consejo

import pytest
from fastapi.testclient import TestClient

from docs_src.path_params.tutorial003_py39 import app

client = TestClient(app)


@pytest.mark.parametrize(
    ("user_id", "expected_response"),
    [
        ("me", {"user_id": "the current user"}),
        ("alice", {"user_id": "alice"}),
    ],
)
def test_get_users(user_id: str, expected_response: dict):
    response = client.get(f"/users/{user_id}")