#!/usr/bin/env python3

# Test whether "topic alias" works to the broker
# MQTT v5

from mosq_test_helper import *

rc = 1
keepalive = 60
connect_packet = mosq_test.gen_connect("sub-test", keepalive=keepalive, proto_ver=5)
connack_packet = mosq_test.gen_connack(rc=0, proto_ver=5)

props = mqtt5_props.gen_uint16_prop(mqtt5_props.PROP_TOPIC_ALIAS, 3)
publish1_packet = mosq_test.gen_publish("", qos=0, payload="message", proto_ver=5, properties=props)

disconnect_packet = mosq_test.gen_disconnect(reason_code=148, proto_ver=5)

port = mosq_test.get_port()
broker = mosq_test.start_broker(filename=os.path.basename(__file__), port=port)

try:
    sock = mosq_test.do_client_connect(connect_packet, connack_packet, timeout=5, port=port)
    sock.send(publish1_packet)

    if mosq_test.expect_packet(sock, "disconnect", disconnect_packet):
        rc = 0

    sock.close()
finally:
    broker.terminate()
    broker.wait()
    (stdo, stde) = broker.communicate()
    if rc:
        print(stde.decode('utf-8'))

exit(rc)

