def test_send_receive_with_none_context():
server = TCPServer(name='server', host='localhost', port=0)
client = TCPClient(name='client',
host=context('server', '{{host}}'),
port=context('server', '{{port}}'))
assert server.port is None
server.start()
server._wait_started()
assert server.port != 0
should_raise(ValueError, client.start)
server.stop()
server._wait_stopped()
def test_send_receive_no_context():
server = TCPServer(name='server', host='localhost', port=0)
assert server.port is None
server.start()
server._wait_started()
assert server.port != 0
client = TCPClient(name='client', host=server._host, port=server._port)
client.start()
client._wait_started()
send_receive_message(server, client)
client.stop()
client._wait_stopped()
server.stop()
server._wait_stopped()