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  2. github.com/tiangolo/fastapi

    docs/de/docs/advanced/testing-websockets.md 

    # WebSockets testen

Sie können den schon bekannten `TestClient` zum Testen von WebSockets verwenden.

Dazu verwenden Sie den `TestClient` in einer `with`-Anweisung, eine Verbindung zum WebSocket herstellend:

```Python hl_lines="27-31"
{!../../../docs_src/app_testing/tutorial002.py!}
```

!!! note "Hinweis"
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  3. github.com/tiangolo/fastapi

    docs/em/docs/advanced/testing-websockets.md 

    👉, 👆 ⚙️ `TestClient` `with` 📄, 🔗*️⃣:

```Python hl_lines="27-31"
{!../../../docs_src/app_testing/tutorial002.py!}
```

!!! note
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  4. github.com/tiangolo/fastapi

    tests/test_tutorial/test_websockets/test_tutorial002_py310.py 

    @needs_py310
def test_websocket_with_header(app: FastAPI):
    client = TestClient(app)
    with pytest.raises(WebSocketDisconnect):
        with client.websocket_connect("/items/bar/ws?token=some-token") as websocket:
            message = "Message one"
            websocket.send_text(message)
            data = websocket.receive_text()
            assert data == "Session cookie or query token value is: some-token"
            data = websocket.receive_text()
    Python
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  5. github.com/tiangolo/fastapi

    docs/en/docs/reference/request.md 

    ```python
from fastapi import Request
```

!!! tip
    When you want to define dependencies that should be compatible with both HTTP and WebSockets, you can define a parameter that takes an `HTTPConnection` instead of a `Request` or a `WebSocket`.
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  6. github.com/tiangolo/fastapi

    tests/test_tutorial/test_websockets/test_tutorial001.py 

    from fastapi.websockets import WebSocketDisconnect

from docs_src.websockets.tutorial001 import app

client = TestClient(app)


def test_main():
    response = client.get("/")
    assert response.status_code == 200, response.text
    assert b"<!DOCTYPE html>" in response.content


def test_websocket():
    with pytest.raises(WebSocketDisconnect):
        with client.websocket_connect("/ws") as websocket:
    Python
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  7. github.com/tiangolo/fastapi

    fastapi/__init__.py 

    from .param_functions import Security as Security
from .requests import Request as Request
from .responses import Response as Response
from .routing import APIRouter as APIRouter
from .websockets import WebSocket as WebSocket
    Python
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  8. github.com/tiangolo/fastapi

    tests/test_tutorial/test_websockets/test_tutorial003_py39.py 

    
@needs_py39
def test_get(client: TestClient, html: str):
    response = client.get("/")
    assert response.text == html


@needs_py39
def test_websocket_handle_disconnection(client: TestClient):
    with client.websocket_connect("/ws/1234") as connection, client.websocket_connect(
        "/ws/5678"
    ) as connection_two:
        connection.send_text("Hello from 1234")
        data1 = connection.receive_text()
    Python
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  9. github.com/tiangolo/fastapi

    tests/test_tutorial/test_websockets/test_tutorial002_an_py39.py 

    @needs_py39
def test_websocket_with_header(app: FastAPI):
    client = TestClient(app)
    with pytest.raises(WebSocketDisconnect):
        with client.websocket_connect("/items/bar/ws?token=some-token") as websocket:
            message = "Message one"
            websocket.send_text(message)
            data = websocket.receive_text()
            assert data == "Session cookie or query token value is: some-token"
            data = websocket.receive_text()
    Python
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  10. github.com/tiangolo/fastapi

    tests/test_tutorial/test_websockets/test_tutorial003.py 

    from fastapi.testclient import TestClient

from docs_src.websockets.tutorial003 import app, html

client = TestClient(app)


def test_get():
    response = client.get("/")
    assert response.text == html


def test_websocket_handle_disconnection():
    with client.websocket_connect("/ws/1234") as connection, client.websocket_connect(
        "/ws/5678"
    ) as connection_two:
        connection.send_text("Hello from 1234")
    Python
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  11. github.com/tiangolo/fastapi

    docs/en/docs/alternatives.md 

    It has an interesting, uncommon feature: using the same framework, it's possible to create APIs and also CLIs.

As it is based on the previous standard for synchronous Python web frameworks (WSGI), it can't handle Websockets and other things, although it still has high performance too.

!!! info
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