{* ../../docs_src/app_testing/tutorial004.py hl[9:15,18,27:28,30:32,41:43] *}


You can read more details about the ["Running lifespan in tests in the official Starlette documentation site."](https://www.starlette.io/lifespan/#running-lifespan-in-tests)

For the deprecated `startup` and `shutdown` events, you can use the `TestClient` as follows:

## Using `TestClient` { #using-testclient }

/// info

To use `TestClient`, first install <a href="https://www.python-httpx.org" class="external-link" target="_blank">`httpx`</a>.

Make sure you create a [virtual environment](../virtual-environments.md){.internal-link target=_blank}, activate it, and then install it, for example:

```console
$ pip install httpx
```

///

Import `TestClient`.

# Testing WebSockets { #testing-websockets }

You can use the same `TestClient` to test WebSockets.

For this, you use the `TestClient` in a `with` statement, connecting to the WebSocket:

{* ../../docs_src/app_testing/tutorial002.py hl[27:31] *}

/// note

For more details, check Starlette's documentation for <a href="https://www.starlette.io/testclient/#testing-websocket-sessions" class="external-link" target="_blank">testing WebSockets</a>.

The `TestClient` does some magic inside to call the asynchronous FastAPI application in your normal `def` test functions, using standard pytest. But that magic doesn't work anymore when we're using it inside asynchronous functions. By running our tests asynchronously, we can no longer use the `TestClient` inside our test functions.

    - reference/openapi/docs.md
    - reference/openapi/models.md
  - reference/security/index.md
  - reference/encoders.md
  - reference/staticfiles.md
  - reference/templating.md
  - reference/testclient.md
- fastapi-people.md
- Resources:
  - resources/index.md
  - help-fastapi.md
  - contributing.md
  - project-generation.md
  - external-links.md
  - newsletter.md
  - management-tasks.md

⚙️ 💃:

* <a href="https://www.python-httpx.org" target="_blank"><code>httpx</code></a> - ✔ 🚥 👆 💚 ⚙️ `TestClient`.
* <a href="https://jinja.palletsprojects.com" target="_blank"><code>jinja2</code></a> - ✔ 🚥 👆 💚 ⚙️ 🔢 📄 📳.

בשימוש Starlette:

-   <a href="https://www.python-httpx.org" target="_blank"><code>httpx</code></a> - דרוש אם ברצונכם להשתמש ב - `TestClient`.
-   <a href="https://jinja.palletsprojects.com" target="_blank"><code>jinja2</code></a> - דרוש אם ברצונכם להשתמש בברירת המחדל של תצורת הטמפלייטים.

স্টারলেট দ্বারা ব্যবহৃত:

- <a href="https://www.python-httpx.org" target="_blank"><code>httpx</code></a> - আপনি যদি `TestClient` ব্যবহার করতে চান তাহলে আবশ্যক।
- <a href="https://jinja.palletsprojects.com" target="_blank"><code>jinja2</code></a> - আপনি যদি প্রদত্ত টেমপ্লেট রূপরেখা ব্যবহার করতে চান তাহলে প্রয়োজন।

Starlette által használt:

* <a href="https://www.python-httpx.org" target="_blank"><code>httpx</code></a> - Követelmény ha a `TestClient`-et akarod használni.
* <a href="https://jinja.palletsprojects.com" target="_blank"><code>jinja2</code></a> - Követelmény ha az alap template konfigurációt akarod használni.

Используется Starlette:

* <a href="https://www.python-httpx.org" target="_blank"><code>HTTPX</code></a> - Обязательно, если вы хотите использовать `TestClient`.
* <a href="https://jinja.palletsprojects.com" target="_blank"><code>jinja2</code></a> - Обязательно, если вы хотите использовать конфигурацию шаблона по умолчанию.