{!../../docs_src/conditional_openapi/tutorial001.py!}
```

Hier deklarieren wir die Einstellung `openapi_url` mit dem gleichen Defaultwert `"/openapi.json"`.

Und dann verwenden wir das beim Erstellen der `FastAPI`-App.

Dann könnten Sie OpenAPI (einschließlich der Dokumentationsoberflächen) deaktivieren, indem Sie die Umgebungsvariable `OPENAPI_URL` auf einen leeren String setzen, wie zum Beispiel:

<div class="termy">

```console

```

And then you can return any object you need, as you normally would (a `dict`, a database model, etc).

And if you declared a `response_model`, it will still be used to filter and convert the object you returned.

**FastAPI** will use that *temporal* response to extract the status code (also cookies and headers), and will put them in the final response that contains the value you returned, filtered by any `response_model`.

```

////

/// note | "Teknik Detaylar"

`Cookie` sınıfı `Path` ve `Query` sınıflarının kardeşidir. Diğerleri gibi `Param` sınıfını miras alan bir sınıftır.

Ancak `fastapi`'dan projenize dahil ettiğiniz `Query`, `Path`, `Cookie` ve diğerleri aslında özel sınıflar döndüren birer fonksiyondur.

///

/// info | "Bilgi"

from fastapi.testclient import TestClient

from .main import app

client = TestClient(app)


def test_read_item():
    response = client.get("/items/foo", headers={"X-Token": "coneofsilence"})
    assert response.status_code == 200
    assert response.json() == {
        "id": "foo",
        "title": "Foo",
        "description": "There goes my hero",
    }


def test_read_item_bad_token():

from fastapi.testclient import TestClient

from .main import app

client = TestClient(app)


def test_read_item():
    response = client.get("/items/foo", headers={"X-Token": "coneofsilence"})
    assert response.status_code == 200
    assert response.json() == {
        "id": "foo",
        "title": "Foo",
        "description": "There goes my hero",
    }


def test_read_item_bad_token():

Projeniz için ilginç ve yararlı görünen bir şey varsa devam edin ve inceleyin, aksi halde bunları atlayabilirsiniz.

/// tip | "İpucu"

**FastAPI**'ı düzgün (ve önerilen) şekilde öğrenmek istiyorsanız [Öğretici - Kullanıcı Rehberi](../tutorial/index.md){.internal-link target=_blank}'ni bölüm bölüm okuyun.

⤴️ 👆 🛠️ 🔜 (➡️ 🌈):

* 📨 🧾 🕴 🔢 👩‍💻.
* 📈 💸.
* 📨 📨 🔙 🛠️ 👩‍💻 (🔢 👩‍💻).
    * 👉 🔜 🔨 📨 🏤 📨 (⚪️➡️ *👆 🛠️*) *🔢 🛠️* 🚚 👈 🔢 👩‍💻 (👉 "⏲").

## 😐 **FastAPI** 📱

➡️ 🥇 👀 ❔ 😐 🛠️ 📱 🔜 👀 💖 ⏭ ❎ ⏲.

⚫️ 🔜 ✔️ *➡ 🛠️* 👈 🔜 📨 `Invoice` 💪, & 🔢 🔢 `callback_url` 👈 🔜 🔌 📛 ⏲.

👉 🍕 📶 😐, 🌅 📟 🎲 ⏪ 😰 👆:

```Python hl_lines="9-13  36-53"

from fastapi.testclient import TestClient

from docs_src.dependencies.tutorial008b import app

client = TestClient(app)


def test_get_no_item():
    response = client.get("/items/foo")
    assert response.status_code == 404, response.text
    assert response.json() == {"detail": "Item not found"}


def test_owner_error():
    response = client.get("/items/plumbus")
    assert response.status_code == 400, response.text

import pytest
from dirty_equals import IsDict
from fastapi.testclient import TestClient

from ...utils import needs_py39


@pytest.fixture(name="client")
def get_client():
    from docs_src.dependencies.tutorial012_an_py39 import app

    client = TestClient(app)
    return client


@needs_py39
def test_get_no_headers_items(client: TestClient):
    response = client.get("/items/")

import os
from pathlib import Path

from fastapi.testclient import TestClient

from ...utils import needs_py310


@needs_py310
def test():
    from docs_src.background_tasks.tutorial002_py310 import app

    client = TestClient(app)
    log = Path("log.txt")
    if log.is_file():
        os.remove(log)  # pragma: no cover
    response = client.post("/send-notification/******@****.***?q=some-query")