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test_poller.py
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import socket
import unittest
from channels import Channel, EndpointClosedException
from channels.poller import Poller
from channels.testing import TestChannel
from utils import timeout
def _connect_and_get_client_channel(tc, poller):
serv = socket.socket()
serv.bind(('127.0.0.1', 0))
serv.listen(0)
tc.addCleanup(serv.close)
addr, port = serv.getsockname()
poller.add_server(serv)
client = socket.create_connection((addr, port))
result = list(poller.poll(0.01)) # accepts the client
return client, result[0][0][1]
class PollerTest(unittest.TestCase):
def setUp(self):
self._poller = Poller()
def tearDown(self):
self._poller.close_all()
def test_blocking_poll(self):
with self.assertRaisesRegex(Exception, "timeout"), timeout(0.02):
self._poller.poll()
def test_timed_poll(self):
with timeout(0.02):
result = self._poller.poll(0.01)
self.assertEqual(list(result), [])
def test_timed_out_poll(self):
with self.assertRaisesRegex(Exception, "timeout"), timeout(0.02):
self._poller.poll(0.03)
def test_poll_data(self):
chan = TestChannel()
self._poller.register(chan)
chan.put(b'hello\n')
with timeout(0.02):
result = self._poller.poll()
self.assertEqual(list(result), [(b'hello\n', chan)])
def test_poll_no_data(self):
chan = TestChannel()
self._poller.register(chan)
with timeout(0.02):
result = self._poller.poll(0.01)
self.assertEqual(list(result), [])
def test_poll_accept(self):
client, cl_chan = _connect_and_get_client_channel(self, self._poller)
client.send(b'hello\n')
result = self._poller.poll(0.01)
self.assertEqual(list(result), [(b'hello\n', cl_chan)])
def test_close_all_channels(self):
chan = TestChannel()
self._poller.register(chan)
self._poller.close_all()
with self.assertRaises(EndpointClosedException):
chan.read()
def test_close_all_servers(self):
serv = socket.socket()
serv.bind(('127.0.0.1', 0))
serv.listen(0)
self.addCleanup(serv.close)
self._poller.add_server(serv)
self._poller.close_all()
with timeout(0.01), self.assertRaises(OSError):
serv.accept()
def test_unregister(self):
chan = TestChannel()
self._poller.register(chan)
chan.put(b'hello\n')
self._poller.unregister(chan)
with self.assertRaisesRegex(Exception, "timeout"), timeout(0.02):
self._poller.poll()
def test_unregister_twice(self):
chan = TestChannel()
self._poller.register(chan)
chan.put(b'hello\n')
self._poller.unregister(chan)
self._poller.unregister(chan)
def test_closed(self):
chan = TestChannel()
self._poller.register(chan)
chan.close()
with timeout(0.01):
result = self._poller.poll()
self.assertEqual(result, [(b'', chan)])
def test_disconnect(self):
client, cl_chan = _connect_and_get_client_channel(self, self._poller)
client.close()
result = list(self._poller.poll(0.01))
self.assertEqual(result, [(b'', cl_chan)])
def test_unregister_on_disconnect(self):
client, cl_chan = _connect_and_get_client_channel(self, self._poller)
client.close()
self._poller.poll(0.01)
result = list(self._poller.poll(0.01))
self.assertEqual(result, [])
class LineBufferedPollerTest(unittest.TestCase):
def setUp(self):
self._poller = Poller(buffering='line')
self._client, self._cl_chan = _connect_and_get_client_channel(self, self._poller)
def tearDown(self):
self._poller.close_all()
def test_partial_line(self):
self._client.send(b'test')
result = list(self._poller.poll(0.01))
self.assertEqual(result, [])
self._client.send(b'post\n')
result = list(self._poller.poll(0.01))
self.assertEqual(result, [(b'testpost\n', self._cl_chan)])
def test_lines(self):
self._client.send(b'test\nrest\n')
result = list(self._poller.poll(0.01))
self.assertEqual(result, [(b'test\n', self._cl_chan),
(b'rest\n', self._cl_chan)])
class PollerBufferingTest(unittest.TestCase):
def test_bytes_poller(self):
poller = Poller()
_, cl_chan = _connect_and_get_client_channel(self, poller)
self.assertEqual(cl_chan.buffering, 'bytes')
def test_line_poller(self):
poller = Poller(buffering='line')
_, cl_chan = _connect_and_get_client_channel(self, poller)
self.assertEqual(cl_chan.buffering, 'line')