`TestClient` 是基于 <a href="https://www.python-httpx.org" class="external-link" target="_blank">HTTPX</a> 的。幸运的是，我们可以直接使用它来测试API。

## 示例

举个简单的例子，让我们来看一个[更大的应用](../tutorial/bigger-applications.md){.internal-link target=_blank}和[测试](../tutorial/testing.md){.internal-link target=_blank}中描述的类似文件结构：

```
.
├── app
│   ├── __init__.py
│   ├── main.py
│   └── test_main.py
```

     * Returns the value of the {@link Field}.
     *
     * @param <T>
     *            the type of the field
     * @param target
     *            the target object. Must not be {@literal null}
     * @return the value of the {@link Field}
     */
    <T> T getFieldValue(Object target);

    /**
     * Returns the value of the static {@link Field}.
     *
     * @param <T>

     *
     * @param <T>
     *            the property type
     * @param target
     *            the target object. Must not be {@literal null}
     * @return the property value
     */
    <T> T getValue(Object target);

    /**
     * Sets the value of the property.
     *
     * @param target
     *            the target object. Must not be {@literal null}
     * @param value

### Install `pydantic-settings` { #install-pydantic-settings }

First, make sure you create your [virtual environment](../virtual-environments.md){.internal-link target=_blank}, activate it, and then install the `pydantic-settings` package:

<div class="termy">

```console

Qualquer função que possa ser utilizada com:

* <a href="https://docs.python.org/3/library/contextlib.html#contextlib.contextmanager" class="external-link" target="_blank">`@contextlib.contextmanager`</a> ou
* <a href="https://docs.python.org/3/library/contextlib.html#contextlib.asynccontextmanager" class="external-link" target="_blank">`@contextlib.asynccontextmanager`</a>

pode ser utilizada como uma dependência do **FastAPI**.

///

## Más información

Para aprender más sobre las opciones, revisa la documentación de Starlette para:

* <a href="https://www.starlette.io/websockets/" class="external-link" target="_blank">La clase `WebSocket`</a>.

<div style="text-align: right; margin-right: 10%;">Ines Montani...

          "values": false
        },
        "showUnfilled": false,
        "sizing": "auto",
        "text": {},
        "valueMode": "color"
      },
      "pluginVersion": "10.4.0",
      "targets": [
        {
          "datasource": {
            "type": "prometheus",
            "uid": "${DS_PROMETHEUS}"
          },
          "editorMode": "code",
          "exemplar": true,

    private static final long serialVersionUID = 7760491787158046906L;

    /**
     * The target class.
     */
    private final Class<?> targetClass;

    /**
     * Creates a {@link InvocationTargetRuntimeException}.
     *
     * @param targetClass
     *            Target class
     * @param cause
     *            The cause of the exception
     */

* <a href="https://strawberry.rocks/" class="external-link" target="_blank">Strawberry</a> 🍓
    * Con <a href="https://strawberry.rocks/docs/integrations/fastapi" class="external-link" target="_blank">documentación para FastAPI</a>
* <a href="https://ariadnegraphql.org/" class="external-link" target="_blank">Ariadne</a>
    * Con <a href="https://ariadnegraphql.org/docs/fastapi-integration" class="external-link" target="_blank">documentación para FastAPI</a>