jupyter-server test failure with pytest-jupyter 0.10.0

[frenzymadness]

I'm testing jupyter-server with the latest pytest-jupyter and it seems that they are not compatible. The problem is:

    def client_fetch(*parts, headers=None, params=None, **kwargs):
        if not headers:
            headers = {}
        if not params:
            params = {}
        # Handle URL strings
        path_url = url_escape(url_path_join(*parts), plus=False)
        base_path_url = url_path_join(jp_base_url, path_url)
        urlparts = urllib.parse.urlparse(f"ws://localhost:{jp_http_port}")
        urlparts = urlparts._replace(path=base_path_url, query=urllib.parse.urlencode(params))
        url = urlparts.geturl()
        # Add auth keys to header, if not overridden
        for key, value in jp_auth_header.items():
            headers.setdefault(key, value)
        # Make request.
        req = tornado.httpclient.HTTPRequest(url, headers=headers, connect_timeout=120)
>       return tornado.websocket.websocket_connect(req, **kwargs)
E       TypeError: websocket_connect() got an unexpected keyword argument 'body'

The new version of pytest-jupyter is passing the keyword arguments to tornado.websocket and jupyter-server has body in the arguments: https://github.com/jupyter-server/jupyter_server/blob/0b4d6678fde435d053a6896a6f23fbc0d41d00c7/tests/auth/test_authorizer.py#L225 and that seems to not be supported by tornado.

I'm not sure where this should be fixed so reporting it here.

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[frenzymadness]

Fixed in #81