"item": {
                "name": "Bar",
                "price": 0.2,
                "description": "Some bar",
                "tax": "5.4",
            }
        },
    )
    assert response.status_code == 200
    assert response.json() == {
        "item_id": 6,
        "item": {
            "name": "Bar",
            "price": 0.2,
            "description": "Some bar",
            "tax": 5.4,
        },

            "item": {
                "name": "Bar",
                "price": 0.2,
                "description": "Some bar",
                "tax": "5.4",
            }
        },
    )
    assert response.status_code == 200
    assert response.json() == {
        "item_id": 6,
        "item": {
            "name": "Bar",
            "price": 0.2,
            "description": "Some bar",
            "tax": 5.4,
        },

        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()
            assert data == f"Message text was: {message}, for item ID: bar"
            message = "Message two"

    Iterator<String> iterator = singletonList("foo").iterator();
    assertEquals("foo", getOnlyElement(iterator, "bar"));
  }

  public void testGetOnlyElement_withDefault_empty() {
    Iterator<String> iterator = emptyIterator();
    assertEquals("bar", getOnlyElement(iterator, "bar"));
  }

  public void testGetOnlyElement_withDefault_empty_null() {
    Iterator<String> iterator = emptyIterator();

foo.txt foo bar.txt bar...

        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()
            assert data == f"Message text was: {message}, for item ID: bar"
            message = "Message two"

class Item(BaseModel):
    name: str
    description: Union[str, None] = None
    price: float
    tax: float = 10.5
    tags: List[str] = []


items = {
    "foo": {"name": "Foo", "price": 50.2},
    "bar": {"name": "Bar", "description": "The bartenders", "price": 62, "tax": 20.2},
    "baz": {"name": "Baz", "description": None, "price": 50.2, "tax": 10.5, "tags": []},
}

            "item": {
                "name": "Bar",
                "price": 0.2,
                "description": "Some bar",
                "tax": "5.4",
            }
        },
    )
    assert response.status_code == 200
    assert response.json() == {
        "item_id": 6,
        "item": {
            "name": "Bar",
            "price": 0.2,
            "description": "Some bar",
            "tax": 5.4,
        },

            "item": {
                "name": "Bar",
                "price": 0.2,
                "description": "Some bar",
                "tax": "5.4",
            }
        },
    )
    assert response.status_code == 200
    assert response.json() == {
        "item_id": 6,
        "item": {
            "name": "Bar",
            "price": 0.2,
            "description": "Some bar",
            "tax": 5.4,
        },

    response = client.put("/get-or-create-task/foo")
    print(response.content)
    assert response.status_code == 200, response.text
    assert response.json() == "Listen to the Bar Fighters"
    response = client.put("/get-or-create-task/bar")
    assert response.status_code == 201, response.text