<div class="screenshot">
<img src="/img/tutorial/separate-openapi-schemas/image02.png">
</div>

This means that it will **always have a value**, it's just that sometimes the value could be `None` (or `null` in JSON).

    lines = [json.loads(line) for line in response.text.strip().splitlines()]
    assert lines == [{"name": "foo"}]


def test_stream_bare_sync_iterable():
    response = client.get("/items/stream-bare-sync")
    assert response.status_code == 200
    assert response.headers["content-type"] == "application/jsonl"
    lines = [json.loads(line) for line in response.text.strip().splitlines()]

    response = client.put("/items/foo", json={"name": "Wrestlers"})
    assert response.status_code == 200, response.text
    assert response.json() == {"name": "Wrestlers", "size": None}


def test_create(client: TestClient):
    response = client.put("/items/red", json={"name": "Chillies"})
    assert response.status_code == 201, response.text

def test_main():
    response = client.get("/app")
    assert response.status_code == 200
    assert response.json() == {"message": "Hello World", "root_path": "/api/v1"}


def test_openapi_schema():
    response = client.get("/openapi.json")
    assert response.status_code == 200
    assert response.json() == snapshot(
        {
            "openapi": "3.1.0",
            "info": {"title": "FastAPI", "version": "0.1.0"},

## Convertir cualquier Dato a Compatible con JSON { #convert-any-data-to-json-compatible }

Para convertir cualquier dato a compatible con JSON, lee la documentación para [Tutorial - Codificador Compatible con JSON](../tutorial/encoder.md).

## Metadatos OpenAPI - Documentación { #openapi-metadata-docs }

)


client = TestClient(app)

json_type = "application/json"
text_type = "text/plain; charset=utf-8"
html_type = "text/html; charset=utf-8"
override_type = "application/x-override"


def test_app():
    with client:
        response = client.get("/")
    assert response.json() == {"msg": "Hello World"}
    assert response.headers["content-type"] == json_type

    def endpoint(response: Annotated[Response, Depends(modify_response)]):
        return {"status": "ok"}

    client = TestClient(app)
    resp = client.get("/")

    assert resp.status_code == 200
    assert resp.json() == {"status": "ok"}
    assert resp.headers.get("X-Custom") == "modified"


def test_response_with_depends_default():
    """Response type hint should work with Response = Depends(...)."""
    app = FastAPI()

*path operation* を非推奨にし、ドキュメント UI に表示するには、[チュートリアル - path operation の設定 - 非推奨](../tutorial/path-operation-configuration.md#deprecate-a-path-operation) を参照してください。

## 任意のデータを JSON 互換に変換 { #convert-any-data-to-json-compatible }

任意のデータを JSON 互換に変換するには、[チュートリアル - JSON 互換エンコーダ](../tutorial/encoder.md) を参照してください。

## OpenAPI メタデータ - ドキュメント { #openapi-metadata-docs }

///

## "Form Alanları" Hakkında { #about-form-fields }

HTML formlarının (`<form></form>`) verileri sunucuya gönderme şekli normalde bu veri için JSON'dan farklı "özel" bir encoding kullanır.

**FastAPI** bu veriyi JSON yerine doğru yerden okuyacaktır.

/// note | Teknik Detaylar

#### `openapi.json` Dosyasına Göz At { #check-the-openapi-json }

Ham OpenAPI şemasının nasıl göründüğünü merak ediyorsanız, FastAPI otomatik olarak tüm API'nızın açıklamalarını içeren bir JSON (şema) üretir.

Bunu doğrudan şuradan görebilirsiniz: [http://127.0.0.1:8000/openapi.json](http://127.0.0.1:8000/openapi.json).

Şuna benzer bir şekilde başlayan bir JSON gösterecektir:

```JSON
{
    "openapi": "3.1.0",