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import unittest
from twisted.internet import defer
from mock import Mock, patch
from synapse.util.distributor import Distributor
class DistributorTestCase(unittest.TestCase):
def setUp(self):
self.dist = Distributor()
def test_signal_dispatch(self):
self.dist.declare("alert")
observer = Mock()
self.dist.observe("alert", observer)
d = self.dist.fire("alert", 1, 2, 3)
self.assertTrue(d.called)
observer.assert_called_with(1, 2, 3)
def test_signal_dispatch_deferred(self):
self.dist.declare("whine")
d_inner = defer.Deferred()
def observer():
return d_inner
self.dist.observe("whine", observer)
d_outer = self.dist.fire("whine")
self.assertFalse(d_outer.called)
d_inner.callback(None)
self.assertTrue(d_outer.called)
def test_signal_catch(self):
self.dist.declare("alarm")
observers = [Mock() for i in 1, 2]
for o in observers:
self.dist.observe("alarm", o)
observers[0].side_effect = Exception("Awoogah!")
with patch("synapse.util.distributor.logger",
spec=["warning"]
) as mock_logger:
d = self.dist.fire("alarm", "Go")
self.assertTrue(d.called)
observers[0].assert_called_once("Go")
observers[1].assert_called_once("Go")
self.assertEquals(mock_logger.warning.call_count, 1)
self.assertIsInstance(mock_logger.warning.call_args[0][0],
str)
def test_signal_prereg(self):
observer = Mock()
self.dist.observe("flare", observer)
self.dist.declare("flare")
self.dist.fire("flare", 4, 5)
observer.assert_called_with(4, 5)
def test_signal_undeclared(self):
with self.assertRaises(KeyError):
self.dist.fire("notification")
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