"""A thorough test of polling PAIR sockets."""

# -----------------------------------------------------------------------------
#  Copyright (c) 2010 Brian Granger
#
#  Distributed under the terms of the New BSD License.  The full license is in
#  the file COPYING.BSD, distributed as part of this software.
# -----------------------------------------------------------------------------

import time

import zmq

print("Running polling tests for PAIR sockets...")

addr = 'tcp://127.0.0.1:5555'
ctx = zmq.Context()
s1 = ctx.socket(zmq.PAIR)
s2 = ctx.socket(zmq.PAIR)

s1.bind(addr)
s2.connect(addr)

# Sleep to allow sockets to connect.
time.sleep(1.0)

poller = zmq.Poller()
poller.register(s1, zmq.POLLIN | zmq.POLLOUT)
poller.register(s2, zmq.POLLIN | zmq.POLLOUT)

# Now make sure that both are send ready.
socks = dict(poller.poll())
assert socks[s1] == zmq.POLLOUT
assert socks[s2] == zmq.POLLOUT

# Now do a send on both, wait and test for zmq.POLLOUT|zmq.POLLIN
s1.send('msg1')
s2.send('msg2')
time.sleep(1.0)
socks = dict(poller.poll())
assert socks[s1] == zmq.POLLOUT | zmq.POLLIN
assert socks[s2] == zmq.POLLOUT | zmq.POLLIN

# Make sure that both are in POLLOUT after recv.
s1.recv()
s2.recv()
socks = dict(poller.poll())
assert socks[s1] == zmq.POLLOUT
assert socks[s2] == zmq.POLLOUT

poller.unregister(s1)
poller.unregister(s2)

# Wait for everything to finish.
time.sleep(1.0)

print("Finished.")
