# Testing Dependencies with Overrides

## Overriding dependencies during testing

There are some scenarios where you might want to override a dependency during testing.

You don't want the original dependency to run (nor any of the sub-dependencies it might have).

```Python hl_lines="2-4"
{!../../docs_src/dependencies/tutorial007.py!}
```

Полученное значение и есть то, что будет внедрено в функцию операции пути и другие зависимости:

```Python hl_lines="4"
{!../../docs_src/dependencies/tutorial007.py!}
```

Код, следующий за оператором `yield`, выполняется после доставки ответа:

```Python hl_lines="5-6"
{!../../docs_src/dependencies/tutorial007.py!}
```

/// tip | "Подсказка"

レスポンスを送信する前に`yield`文を含む前のコードのみが実行されます。

```Python hl_lines="2 3 4"
{!../../docs_src/dependencies/tutorial007.py!}
```

生成された値は、*path operations*や他の依存関係に注入されるものです:

```Python hl_lines="4"
{!../../docs_src/dependencies/tutorial007.py!}
```

`yield`文に続くコードは、レスポンスが送信された後に実行されます:

```Python hl_lines="5 6"
{!../../docs_src/dependencies/tutorial007.py!}
```

/// tip | "豆知識"

`async`や通常の関数を使用することができます。

```Python hl_lines="11-15"
{!> ../../docs_src/dependencies/tutorial002.py!}
```

////

//// tab | 🐍 3️⃣.1️⃣0️⃣ & 🔛

```Python hl_lines="9-13"
{!> ../../docs_src/dependencies/tutorial002_py310.py!}
```

////

💸 🙋 `__init__` 👩‍🔬 ⚙️ ✍ 👐 🎓:

//// tab | 🐍 3️⃣.6️⃣ & 🔛

```Python hl_lines="12"
{!> ../../docs_src/dependencies/tutorial002.py!}
```

////

```Python hl_lines="9-13"
{!> ../../docs_src/dependencies/tutorial002_py310.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="11-15"
{!> ../../docs_src/dependencies/tutorial002.py!}
```

////

注意用于创建类实例的 `__init__` 方法：

//// tab | Python 3.10+

```Python hl_lines="10"
{!> ../../docs_src/dependencies/tutorial002_py310.py!}
```

////

```Python hl_lines="11-15"
{!> ../../docs_src/dependencies/tutorial002.py!}
```

////

//// tab | 파이썬 3.10 이상

```Python hl_lines="9-13"
{!> ../../docs_src/dependencies/tutorial002_py310.py!}
```

////

클래스의 인스턴스를 생성하는 데 사용되는 `__init__` 메서드에 주목하기 바랍니다:

//// tab | 파이썬 3.6 이상

```Python hl_lines="12"
{!> ../../docs_src/dependencies/tutorial002.py!}
```

////

## Adicionando `dependencies` ao decorador da operação de rota

O *decorador da operação de rota* recebe um argumento opcional `dependencies`.

Ele deve ser uma lista de `Depends()`:

//// tab | Python 3.9+

```Python hl_lines="19"
{!> ../../docs_src/dependencies/tutorial006_an_py39.py!}
```

////

## `dependencies` zum *Pfadoperation-Dekorator* hinzufügen

Der *Pfadoperation-Dekorator* erhält ein optionales Argument `dependencies`.

Es sollte eine `list`e von `Depends()` sein:

//// tab | Python 3.9+

```Python hl_lines="19"
{!> ../../docs_src/dependencies/tutorial006_an_py39.py!}
```

////

```Python hl_lines="11 12 13 14 15"
{!../../docs_src/dependencies/tutorial002.py!}
```

クラスのインスタンスを作成するために使用される`__init__`メソッドに注目してください:

```Python hl_lines="12"
{!../../docs_src/dependencies/tutorial002.py!}
```

...以前の`common_parameters`と同じパラメータを持っています:

```Python hl_lines="8"
{!../../docs_src/dependencies/tutorial001.py!}
```

これらのパラメータは **FastAPI** が依存関係を「解決」するために使用するものです。

///

```Python hl_lines="17"
{!> ../../docs_src/dependencies/tutorial006.py!}
```

////

These dependencies will be executed/solved the same way as normal dependencies. But their value (if they return any) won't be passed to your *path operation function*.

/// tip

Some editors check for unused function parameters, and show them as errors.