How to use the httptools.HttpParserInvalidMethodError function in httptools

def test_parser_request_2(self):
        p = httptools.HttpRequestParser(None)
        with self.assertRaises(httptools.HttpParserInvalidMethodError):
            p.feed_data(b'SPAM /test.php?a=b+c HTTP/1.2')

def data_received(self, data: bytes):
        """
        Called when data is received.

        This is the bulk of the processing.
        """
        # Feed the data to the parser.
        try:
            self.parser.feed_data(data)
        except httptools.HttpParserInvalidMethodError as e:
            ctx = HTTPRequestContext(None, self.app, self.parent_context)
            # Transform it into a 405.
            exc = exc_from(e)
            exc.code = 405
            self.loop.create_task(self._safe_handle_error(ctx, exc))
            return
        except httptools.HttpParserError as e:
            ctx = HTTPRequestContext(None, self.app, self.parent_context)
            # Transform it into a 400.
            exc = exc_from(e)
            exc.code = 400
            self.loop.create_task(self._safe_handle_error(ctx, exc))
            return

        # Wait on the event.
        if self.waiter is None:

def handle_parser_exception(self, exc: Exception):
        """
        Handles an exception when parsing.

        This will not call into the app (hence why it is a normal function, and not a coroutine).
        It will also close the connection when it's done.

        :param exc: The exception to handle.
        """
        if isinstance(exc, httptools.HttpParserInvalidMethodError):
            # 405 method not allowed
            r = MethodNotAllowed()
        elif isinstance(exc, httptools.HttpParserError):
            # 400 bad request
            r = BadRequest()
        elif isinstance(exc, httptools.HttpParserUpgrade):
            r = BadRequest(description="Invalid upgrade header.")
        else:
            # internal server error
            r = InternalServerError()

        # Make a fake environment.
        new_environ = to_wsgi_environment(headers=self.headers, method="", path="/",
                                          http_version="1.0", body=None)
        new_environ["SERVER_NAME"] = self.component.get_server_name()
        new_environ["SERVER_PORT"] = str(self.server_port)