from contextlib import asynccontextmanager
from typing import AsyncGenerator, Dict, Union

import pytest
from fastapi import APIRouter, FastAPI, Request
from fastapi.testclient import TestClient
from pydantic import BaseModel


class State(BaseModel):
    app_startup: bool = False
    app_shutdown: bool = False
    router_startup: bool = False
    router_shutdown: bool = False
    sub_router_startup: bool = False

## About Starlette

You shouldn't pin the version of `starlette`.

Different versions of **FastAPI** will use a specific newer version of Starlette.

So, you can just let **FastAPI** use the correct Starlette version.

## About Pydantic

## Acerca de Starlette

No deberías fijar la versión de `starlette`.

Diferentes versiones de **FastAPI** pueden usar una versión específica de Starlette.

Entonces, puedes dejar que **FastAPI** se asegure por sí mismo de qué versión de Starlette usar.

## Acerca de Pydantic

* `Header()`
* `Form()`
* `File()`

You can import them all directly from `fastapi`:

```python
from fastapi import Body, Cookie, File, Form, Header, Path, Query
```

::: fastapi.Query

::: fastapi.Path

::: fastapi.Body

::: fastapi.Cookie

::: fastapi.Header

::: fastapi.Form

## 🌕 📚 FastAPI 🗄

📂: <a href="https://github.com/tiangolo/full-stack-fastapi-couchbase" class="external-link" target="_blank">https://github.com/tiangolo/full-stack-fastapi-couchbase</a>

👶 👶 **⚠** 👶 👶

🚥 👆 ▶️ 🆕 🏗 ⚪️➡️ 🖌, ✅ 🎛 📥.

# История создания и дальнейшее развитие

Однажды, <a href="https://github.com/fastapi/fastapi/issues/3#issuecomment-454956920" class="external-link" target="_blank">один из пользователей **FastAPI** задал вопрос</a>:

> Какова история этого проекта? Создаётся впечатление, что он явился из ниоткуда и завоевал мир за несколько недель [...]

Что ж, вот небольшая часть истории проекта.

## Альтернативы

Read more about it in the [FastAPI docs about Response Status Code](https://fastapi.tiangolo.com/tutorial/response-status-code/).

## Example

```python
from fastapi import FastAPI, status

app = FastAPI()


@app.get("/items/", status_code=status.HTTP_418_IM_A_TEAPOT)
def read_items():
    return [{"name": "Plumbus"}, {"name": "Portal Gun"}]
```

**FastAPI**'ya neler ilham verdi? Diğer alternatiflerle karşılaştırıldığında farkları neler? **FastAPI** diğer alternatiflerinden neler öğrendi?

## Giriş

Başkalarının daha önceki çalışmaları olmasaydı, **FastAPI** var olmazdı.

Geçmişte oluşturulan pek çok araç **FastAPI**'a ilham kaynağı olmuştur.

import warnings

import pytest
from fastapi import FastAPI, File, Form, UploadFile
from fastapi.dependencies.utils import (
    multipart_incorrect_install_error,
    multipart_not_installed_error,
)


def test_incorrect_multipart_installed_form(monkeypatch):
    monkeypatch.setattr("python_multipart.__version__", "0.0.12")
    with warnings.catch_warnings(record=True):
        warnings.simplefilter("always")

from typing import List

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():