StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

POTornado unit test with web sockets - what about stack context?
text
Body
copied!<p>I've been using tornado server for a while and I have to say I like it. I have a tornado server (which runs on python3.2) that handles web socket and http requests. What I want to do is to write some unit tests (which use web sockets) with ws2py (which implements a ws client to use with the tornado IOLoop). I see tornado has the AsyncTestCase class which looks quite interesting especially when used with an AsyncHTTPClient as stated in its <a href="http://www.tornadoweb.org/documentation/testing.html?highlight=asynctestcase#tornado.testing.AsyncTestCase" rel="nofollow">doc</a>:</p> <pre><code>class MyTestCase2(AsyncTestCase): def test_http_fetch(self): client = AsyncHTTPClient(self.io_loop) client.fetch("http://www.tornadoweb.org/", self.stop) response = self.wait() # Test contents of response self.assertIn("FriendFeed", response.body) </code></pre> <p>I would like to use AsyncTestCase with web sockets, The client is not a problem, i can send and receive messages without problems.</p> <p>I guess what I have to do is to pass <code>self.stop</code> to the client as callback in order to retrieve the received message by calling <code>wait()</code> like in the example above. But somehow this does not work, here is what i have:</p> <pre><code>class SQLRequests(AsyncTestCase): """Tests sql requests""" def test_sql_req_1(self): """first test function""" client = AsyncWSClient(httpBaseUrl, self.io_loop) client.sendMessage('some_message', self.stop) response = self.wait() if response.data: print('got %s' % str(response.data)) # some test self.assertTrue(True) if __name__ == '__main__': unittest.main() </code></pre> <p>This is my web socket client:</p> <pre><code>class AsyncWSClient(TornadoWebSocketClient): """ Asynchronous web socket client based on ws4py's tornadoclient Sends a message and calls callback with received message """ def __init__(self, url, ioLoop=None, **kwargs): TornadoWebSocketClient.__init__(self, url, io_loop=ioLoop, **kwargs) self._callback = None self._message = None def opened(self): """called when web socket opened""" self.send(self._message, binary=False) def received_message(self, message): """Received a message""" self.close() if self._callback: self._callback(message) def sendMessage(self, message, callback): """Connects and sends message when connected""" self._message = message self._callback = callback self.connect() </code></pre> <p>I do receive a <code>ws2py.messaging.TextMessage</code> object as response, but its data field it <code>None</code> although some data has been received by the client. If I have a look into the AsyncTestCase, before it calls the callback, that object has some data in it, which disappears somewhere somehow when it is passed as return value of wait().</p> <p>I see there is a mystical thing in tornado called stack_context, has that something to do with my problem?</p>

Querying!

Guidance

An individual column

Larger individual text columns get their own page to allow for proper reading.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload