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}")

from fastapi.testclient import TestClient

from docs_src.query_params.tutorial005_py39 import app

client = TestClient(app)


def test_foo_needy_very():
    response = client.get("/items/foo?needy=very")
    assert response.status_code == 200
    assert response.json() == {"item_id": "foo", "needy": "very"}


def test_foo_no_needy():
    response = client.get("/items/foo")
    assert response.status_code == 422

import importlib

import pytest
from fastapi.testclient import TestClient

from ...utils import needs_py310


@pytest.fixture(
    name="client",
    params=[
        pytest.param("tutorial014_py39"),
        pytest.param("tutorial014_py310", marks=needs_py310),
        pytest.param("tutorial014_an_py39"),
        pytest.param("tutorial014_an_py310", marks=needs_py310),
    ],
)
def get_client(request: pytest.FixtureRequest):

* Um `client_secret` opcional (não precisamos dele em nosso exemplo).

/// info | Informação

O `OAuth2PasswordRequestForm` não é uma classe especial para **FastAPI** como é `OAuth2PasswordBearer`.

`OAuth2PasswordBearer` faz com que **FastAPI** saiba que é um esquema de segurança. Portanto, é adicionado dessa forma ao OpenAPI.

from fastapi import FastAPI
from fastapi.openapi.docs import (
    get_redoc_html,
    get_swagger_ui_html,
    get_swagger_ui_oauth2_redirect_html,
)
from fastapi.staticfiles import StaticFiles

app = FastAPI(docs_url=None, redoc_url=None)

app.mount("/static", StaticFiles(directory="static"), name="static")


@app.get("/docs", include_in_schema=False)
async def custom_swagger_ui_html():
    return get_swagger_ui_html(

from typing import Annotated

import pytest
from fastapi import Depends, FastAPI, Security
from fastapi.testclient import TestClient


@pytest.fixture(name="call_counter")
def call_counter_fixture():
    return {"count": 0}


@pytest.fixture(name="app")
def app_fixture(call_counter: dict[str, int]):
    def get_db():
        call_counter["count"] += 1
        return f"db_{call_counter['count']}"

Si estás trabajando con **FastAPI** no tienes que preocuparte por eso, porque esa "primera" función será tu *path operation function*, y FastAPI sabrá cómo hacer lo correcto.

Pero si deseas usar `async` / `await` sin FastAPI, también puedes hacerlo.

### Escribe tu propio código async { #write-your-own-async-code }

Например, мы, команда, стоящая за FastAPI, создали <a href="https://fastapicloud.com" class="external-link" target="_blank">**FastAPI Cloud**</a>, чтобы сделать развёртывание приложений FastAPI в облаке как можно более простым и прямолинейным, с тем же удобством для разработчика, что и при работе с FastAPI.

from base64 import b64encode

from fastapi import FastAPI, Security
from fastapi.security import HTTPBasic, HTTPBasicCredentials
from fastapi.testclient import TestClient

app = FastAPI()

security = HTTPBasic(realm="simple", description="HTTPBasic scheme")


@app.get("/users/me")
def read_current_user(credentials: HTTPBasicCredentials = Security(security)):
    return {"username": credentials.username, "password": credentials.password}

from typing import Optional

from fastapi import FastAPI
from fastapi.responses import JSONResponse
from fastapi.testclient import TestClient
from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: str
    price: Optional[float] = None


@app.api_route("/items/{item_id}", methods=["GET"])
def get_items(item_id: str):
    return {"item_id": item_id}


def get_not_decorated(item_id: str):