def test_post_file(tmp_path):
    path = tmp_path / "test.txt"
    path.write_bytes(b"<file content>")

    client = TestClient(app)
    with path.open("rb") as file:
        response = client.post("/files/", files={"file": file})
    assert response.status_code == 200, response.text
    assert response.json() == {"file_size": 14}


def test_post_upload_file(tmp_path):
    path = tmp_path / "test.txt"

///

## Declare atributos do modelo

Você pode então utilizar `Field` com atributos do modelo:

```Python hl_lines="11-14"
{!../../docs_src/body_fields/tutorial001.py!}
```

`Field` funciona da mesma forma que `Query`, `Path` e `Body`, ele possui todos os mesmos parâmetros, etc.

/// note | "Detalhes técnicos"

# 💪 - 💗 🔢

🔜 👈 👥 ✔️ 👀 ❔ ⚙️ `Path` & `Query`, ➡️ 👀 🌅 🏧 ⚙️ 📨 💪 📄.

## 🌀 `Path`, `Query` & 💪 🔢

🥇, ↗️, 👆 💪 🌀 `Path`, `Query` & 📨 💪 🔢 📄 ➡ & **FastAPI** 🔜 💭 ⚫️❔.

& 👆 💪 📣 💪 🔢 📦, ⚒ 🔢 `None`:

//// tab | 🐍 3️⃣.6️⃣ & 🔛

```Python hl_lines="19-21"
{!> ../../docs_src/body_multiple_params/tutorial001.py!}
```

////

//// tab | 🐍 3️⃣.1️⃣0️⃣ & 🔛

    protected String id;

    protected String path;

    protected Date timestamp;

    protected DictionaryFile(final String id, final String path, final Date timestamp) {
        this.id = id;
        this.path = path;
        this.timestamp = timestamp;
    }

    public String getId() {
        return id;
    }

    public String getPath() {
        return path;
    }

    public Date getTimestamp() {

    List<CharMappingItem> mappingItemList;

    public CharMappingFile(final String id, final String path, final Date timestamp) {
        super(id, path, timestamp);
    }

    @Override
    public String getType() {
        return MAPPING;
    }

    @Override
    public String getPath() {
        return path;
    }

    @Override
    public OptionalEntity<CharMappingItem> get(final long id) {

```

////

/// note | "Технические детали"

`Cookie` - это класс, родственный `Path` и `Query`. Он также наследуется от общего класса `Param`.

Но помните, что когда вы импортируете `Query`, `Path`, `Cookie` и другое из `fastapi`, это фактически функции, которые возвращают специальные классы.

///

/// info | "Дополнительная информация"

        ),
        ("/items", {"session": "cookiesession"}, 200, {"ads_id": None}),
    ],
)
def test(path, cookies, expected_status, expected_response):
    from docs_src.cookie_params.tutorial001_an_py310 import app

    client = TestClient(app, cookies=cookies)
    response = client.get(path)
    assert response.status_code == expected_status
    assert response.json() == expected_response


@needs_py310

            "/items",
            {"strange-header": "Not really underscore"},
            200,
            {"strange_header": None},
        ),
    ],
)
def test(path, headers, expected_status, expected_response, client: TestClient):
    response = client.get(path, headers=headers)
    assert response.status_code == expected_status
    assert response.json() == expected_response


@needs_py310

		{
			path:   "/bucket/object///////",
			bucket: "bucket",
			object: "object///////",
		},
		// Test case 7 object has preceding separators.
		{
			path:   "/bucket////object////",
			bucket: "bucket",
			object: "///object////",
		},
		// Test case 8 url path is empty.
		{
			path:   "",
			bucket: "",
			object: "",
		},
	}

	// Validate all test cases.

# ボディ - フィールド

`Query`や`Path`、`Body`を使って *path operation関数* のパラメータに追加のバリデーションやメタデータを宣言するのと同じように、Pydanticの`Field`を使ってPydanticモデルの内部でバリデーションやメタデータを宣言することができます。

## `Field`のインポート

まず、以下のようにインポートします:

```Python hl_lines="4"
{!../../docs_src/body_fields/tutorial001.py!}
```

/// warning | "注意"

`Field`は他の全てのもの（`Query`、`Path`、`Body`など）とは違い、`fastapi`からではなく、`pydantic`から直接インポートされていることに注意してください。

///

## モデルの属性の宣言