Steps to reproduce RabbitMQ qos admin UI bug

rabbitmq_bug_str.md

1. Run docker run --rm -ti -p 5672:5672 -p 15672:15672 rabbitmq:3.6.5-management
2. Fire up a Clojure REPL w/ langohr available
3. (require '[langohr.core :as rmq])
4. (def rconn (rmq/connect))
5. (require '[langohr.channel :as lch])
6. (def rch (lch/open rconn))
7. (require '[langohr.queue :as lq])
8. (lq/declare rch "foo.bar" {:exclusive false :auto-delete false :durable true})
9. (require '[langohr.consumers :as lcons])
10. (lcons/subscribe rch "foo.bar" (fn [_ _ ^bytes m] (println (String. m "UTF-8"))) {:auto-ack true})
11. Go to http://localhost:15672/ in a web browser
    1. Click on Queues
    2. Click on the foo.bar queue
    3. Expand the Consumers section
    4. Verify that "Prefetch count" is zero in the initial table
    5. Click on the consumer
    6. Verify that "Prefetch count" is zero everywhere on that page too
12. (require '[langohr.basic :as lb])
13. (lb/qos rch 12)
14. Go back to foo.bar queue page in RabbitMQ management UI
15. Refresh the page and verify that "Prefetch count" is still 0 there
16. Click on the consumer again and verify that "Prefetch count" is now 12 in the upper "Details" section but still 0 in the Consumers table
17. Declare another channel & queue but set qos before subscribing
    1. (def rch' (lch/open rconn))
    2. (lq/declare rch' "baz.qux" {:exclusive false :auto-delete false :durable true})
    3. (lb/qos rch' 15)
    4. (lcons/subscribe rch' "baz.qux" (fn [_ _ ^bytes m] (println (String. m "UTF-8"))) {:auto-ack true})
18. Click into the baz.qux queue in the RabbitMQ management UI
19. Verify that the "Prefetch count" in the consumers table is 15
20. Click on the consumer and verify that the same Details -> Prefetch count value is 15 here too but the consumers table also now shows 15