import pytest
from fastapi import FastAPI
from fastapi.exceptions import FastAPIError


class NonPydanticModel:
    pass


def test_invalid_response_model_raises():
    with pytest.raises(FastAPIError):
        app = FastAPI()

        @app.get("/", response_model=NonPydanticModel)
        def read_root():
            pass  # pragma: nocover


def test_invalid_response_model_sub_type_raises():
    with pytest.raises(FastAPIError):

        @app.get("/items/{id}")
        def read_items(id: list[Item]):
            pass  # pragma: no cover


def test_invalid_tuple():
    with pytest.raises(AssertionError):
        app = FastAPI()

        class Item(BaseModel):
            title: str

        @app.get("/items/{id}")
        def read_items(id: tuple[Item, Item]):
            pass  # pragma: no cover


def test_invalid_dict():

		},
		{
			SQL:           "create table users (name, age, height, actived, bytes, create_at, update_at, deleted_at, email, role, pass) values (@p1, @p2, @p3, @p4, @p5, @p6, @p7, @p8, @p9, @p10, @p11)",
			NumericRegexp: regexp.MustCompile(`@p(\d+)`),

        with client.websocket_connect("/ws/invalid"):
            pass  # pragma: no cover
    except Exception:
        pass

    assert captured_exception.exception is not None
    error_str = str(captured_exception.exception)
    assert "websocket_endpoint" in error_str
    assert "/ws/" in error_str


def test_subapp_request_validation_error_includes_endpoint_context():
    captured_exception.exception = None
    try:

@app.get("/valid1", responses={"500": {"model": int}})
def valid1():
    pass


@app.get("/valid2", responses={"500": {"model": list[int]}})
def valid2():
    pass


@app.get("/valid3", responses={"500": {"model": Model}})
def valid3():
    pass


@app.get("/valid4", responses={"500": {"model": list[Model]}})
def valid4():
    pass


client = TestClient(app)


def test_path_operations():

    pass  # pragma: no cover


async def ws_dependency_validate(x_missing: str = Header()):
    pass  # pragma: no cover


@router.websocket("/depends-validate/")
async def router_ws_depends_validate(
    websocket: WebSocket, data=Depends(ws_dependency_validate)
):
    pass  # pragma: no cover


class CustomError(Exception):
    pass


@router.websocket("/custom_error/")

        def read_items(q: list[Item] = Query(default=None)):
            pass  # pragma: no cover


def test_invalid_tuple():
    with pytest.raises(AssertionError):
        app = FastAPI()

        class Item(BaseModel):
            title: str

        @app.get("/items/")
        def read_items(q: tuple[Item, Item] = Query(default=None)):
            pass  # pragma: no cover


def test_invalid_dict():

            pass  # pragma: nocover

    with pytest.raises(
        AssertionError,
        match=(
            "`Query` default value cannot be set in `Annotated` for 'item_id'. Set the"
            " default value with `=` instead."
        ),
    ):

        @app.get("/")
        async def get(item_id: Annotated[int, Query(default=1)]):
            pass  # pragma: nocover

    void testHandleSetsNameAndPasswordHappyPath() throws Exception {
        JAASAuthenticator auth = new JAASAuthenticator("DOM", "user", "pass");
        NameCallback nc = new NameCallback("user:");
        PasswordCallback pc = new PasswordCallback("pass:", false);

        // Exercise callback handler with both callbacks supplied
        Callback[] cbs = new Callback[] { nc, pc };
        auth.handle(cbs);

Y tendrás que asegurarte de que sea un único proceso ejecutando esos pasos previos incluso si después, inicias **múltiples procesos** (múltiples workers) para la propia aplicación. Si esos pasos fueran ejecutados por **múltiples procesos**, **duplicarían** el trabajo al ejecutarlo en **paralelo**, y si los pasos fueran algo delicado como una migración de base de datos, podrían causar conflictos entre sí.