mosquitto/test/broker/04-retain-qos1-qos0.py

#!/usr/bin/env python3

# Test whether a retained PUBLISH to a topic with QoS 1 is retained.
# Subscription is made with QoS 0 so the retained message should also have QoS
# 0.

from mosq_test_helper import *

def do_test(proto_ver):
    rc = 1
    keepalive = 60
    connect_packet = mosq_test.gen_connect("retain-qos1-test", keepalive=keepalive, proto_ver=proto_ver)
    connack_packet = mosq_test.gen_connack(rc=0, proto_ver=proto_ver)

    mid = 6
    publish_packet = mosq_test.gen_publish("retain/qos1/test", qos=1, mid=mid, payload="retained message", retain=True, proto_ver=proto_ver)
    if proto_ver == 5:
        puback_packet = mosq_test.gen_puback(mid, proto_ver=proto_ver, reason_code=mqtt5_rc.MQTT_RC_NO_MATCHING_SUBSCRIBERS)
    else:
        puback_packet = mosq_test.gen_puback(mid, proto_ver=proto_ver)

    mid = 18
    subscribe_packet = mosq_test.gen_subscribe(mid, "retain/qos1/test", 0, proto_ver=proto_ver)
    suback_packet = mosq_test.gen_suback(mid, 0, proto_ver=proto_ver)
    publish0_packet = mosq_test.gen_publish("retain/qos1/test", qos=0, payload="retained message", retain=True, proto_ver=proto_ver)

    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, port=port)
        mosq_test.do_send_receive(sock, publish_packet, puback_packet, "puback")
        mosq_test.do_send_receive(sock, subscribe_packet, suback_packet, "suback")

        if mosq_test.expect_packet(sock, "publish0", publish0_packet):
            rc = 0

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


do_test(proto_ver=4)
do_test(proto_ver=5)
exit(0)