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POCan't test reactor.callInThread in my twisted web resource
 

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  1. POCan't test reactor.callInThread in my twisted web resource
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    <p>I have a twisted Web Resource wich handles incoming requests and sends celery tasks to be processed in a Queue, this celery call is handled using reactor.callInThread</p> <p>The thing is that i want to unittest this code but a simple TestCase like the following fails because the code in the reactor.callInThread is never executed</p> <pre><code>from twisted.internet.defer import succeed from twisted.web import server from twisted.web.resource import Resource from twisted.web.test.test_web import DummyRequest from twisted.internet.defer import inlineCallbacks from twisted.trial.unittest import TestCase from twisted.internet import reactor import pytest class BadBeConnectedResultType(Exception): pass class SmartDummyRequest(DummyRequest): def __init__(self, method, url, args=None, headers=None): DummyRequest.__init__(self, url.split('/')) self.method = method self.headers.update(headers or {}) # set args args = args or {} for k, v in args.items(): self.addArg(k, v) def value(self): return "".join(self.written) class DummySite(server.Site): def get(self, url, args=None, headers=None): return self._request("GET", url, args, headers) def post(self, url, args=None, headers=None): return self._request("POST", url, args, headers) def _request(self, method, url, args, headers): request = SmartDummyRequest(method, url, args, headers) resource = self.getResourceFor(request) result = resource.render(request) return self._resolveResult(request, result) def _resolveResult(self, request, result): if isinstance(result, str): request.write(result) request.finish() return succeed(request) elif result is server.NOT_DONE_YET: if request.finished: return succeed(request) else: return request.notifyFinish().addCallback(lambda _: request) else: raise ValueError("Unexpected return value: %r" % (result,)) class TwistedBCTestCase(TestCase): def setUp(self): self.web = DummySite(RootResource()) @inlineCallbacks def test_bc_resource(self): with pytest.raises(BadBeConnectedResultType): response = yield self.web.post("CLARO", args={ 'ResultType':2, 'ResultData':1, 'idDeliver': 1 }) class RootResource(Resource): def render_GET(self, request): return '' def getChild(self, operator_id, request): if operator_id: return BCResource(operator_id) return self class BCResource(Resource): def __init__(self, operator_id): Resource.__init__(self) self.operator_id = operator_id def send_to_queue(self, request): #This is never executed in my test try: result_type = cgi.escape(request.args['ResultType'][0]) if result_type != '1': raise BadBeConnectedResultType(result_type) raw_result_data = cgi.escape(request.args['ResultData'][0]) unique_id = cgi.escape(request.args['IdDeliver'][0]) task = ProcessBCNotificationTask.delay(unique_id, raw_result_data) except BadBeConnectedResultType as e: logger.exception(e) def render_POST(self, request): reactor.callInThread(self.send_to_queue, request) return '' </code></pre> <p>For the record I'm using the approach described in <a href="http://findingscience.com/python/twisted/2012/02/20/testing-twisted-web-resources.html" rel="nofollow">http://findingscience.com/python/twisted/2012/02/20/testing-twisted-web-resources.html</a> to test web resources</p> <pre><code>$ py.test twisted_test.py --tb=short ====================================================================================== test session starts ====================================================================================== platform linux2 -- Python 2.7.3 -- pytest-2.2.4 collected 1 items twisted_test.py F =========================================================================================== FAILURES ============================================================================================ ______________________________________________________________________________ TwistedBCTestCase.test_bc_resource _______________________________________________________________________________ env/lib/python2.7/site-packages/twisted/internet/defer.py:1045: in _inlineCallbacks &gt; result = g.send(result) twisted_test.py:69: in test_bc_resource &gt; 'idDeliver': 1 E Failed: DID NOT RAISE =================================================================================== 1 failed in 0.30 seconds ==================================================================================== </code></pre>
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