def test_getReaders(self):
        """
        L{_ContinuousPolling.getReaders} returns a list of the read
        descriptors.
        """
        poller = _ContinuousPolling(Clock())
        reader = object()
        poller.addReader(reader)
        self.assertIn(reader, poller.getReaders())

        L{_ContinuousPolling.getReaders} returns a list of the read
        descriptors.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/internet/test/test_epollreactor.py