def test__handles_missing_notify_system_listener_on_notification(self):
listener = PostgresListenerService()
# Change notifications to a frozenset. This makes sure that
# the system message does not go into the queue. Instead if should
# call the handler directly in `doRead`.
listener.notifications = frozenset()
yield listener.startService()
yield deferToDatabase(listener.registerChannel, "sys_test")
try:
yield deferToDatabase(self.send_notification, "sys_test", 1)
self.assertFalse("sys_test" in listener.listeners)
finally:
yield listener.stopService()
def test__calls_system_handler_on_notification(self):
listener = PostgresListenerService()
# Change notifications to a frozenset. This makes sure that
# the system message does not go into the queue. Instead if should
# call the handler directly in `doRead`.
listener.notifications = frozenset()
dv = DeferredValue()
listener.register("sys_test", lambda *args: dv.set(args))
yield listener.startService()
try:
yield deferToDatabase(self.send_notification, "sys_test", 1)
yield dv.get(timeout=2)
self.assertEqual(("sys_test", "1"), dv.value)
finally:
yield listener.stopService()
