Доклад Ильи Сунцова на конференции SQA Days-21 www.sqadays.com

8. Милая картинка

9. Read A, write B, read B
Read A, read A, write B
Read A, read B, write B
Реальный мир

10. Нарушение целостности
- Lost updates
- Dirty read
- Stale read
. . . . .

11. Lost updates

13. Доступность

14. Partition tolerance

16. UNIT TESTS
ALL THE STUFF

17. Тестирование производительности

18. Функциональное тестирование

19. https://aphyr.com
Kyle Kingsbury
Создатель Jepsen

20. https://github.com/jepsen-io/jepsen
https://aphyr.com/tags/jepsen

24. Read-Eval-Print Loop (REPL)
Leiningen
wget
https://raw.githubusercontent.com/techno
mancy/leiningen/stable/bin/lein
chmod +x lein
sudo mv lein /usr/local/bin
lein repl

25. Среда разработки
https://www.jetbrains.com
https://cursive-ide.com

26. Пример #1
(ns clojure.examples.hello
(:gen-class))
(defn hello-world [nword]
(println (format "Hello, %s" nword)))
(hello-world "world")
https://www.tutorialspoint.com/clojure/index.htm

27. Пример #2
(ns clojure.examples.hello
(:gen-class))
;; Just for loop
(defn Example []
(loop [x 10]
(when (> x 1)
(println x)
(recur (- x 2)))))
(Example)
https://www.tutorialspoint.com/clojure/index.htm

28. Пример #3
(ns Project
(:gen-class))
;; Clojure + Java
(defn Example []
(def str1 (new String "Hello"))
(println str1))
(Example)
https://www.tutorialspoint.com/clojure/index.htm

29. Пример #4
(ns Project
(:gen-class))
(import java.util.Stack)
(defn Example []
(let [stack (Stack.)]
(.push stack "First Element")
(.push stack "Second Element")
(println (first stack))))
(Example)
https://www.tutorialspoint.com/clojure/index.htm

30. Пример #5
(ns clojure.examples.example
(:gen-class))
(defn Example []
(try
(aget (int-array [1 2 3]) 5)
(catch Exception e (println
(str "caught exception: " (.toString e))))
(finally (println "Blablabla")))
(println "Let's move on"))
(Example))
https://www.tutorialspoint.com/clojure/index.htm

31. https://ignite.apache.org

32. Тестовое окружение

33. Salticid
https://github.com/aphyr/salticid

34. gem install salticid
# example.rb
host '192.168.1.10' do
user 'some_user'
task :hello do
exec! 'ls -la /',
echo: true
end
end
salticid -l example.rb -h 192.168.1.10 hello
https://github.com/aphyr/salticid

35. Test part #1

36. Структура проекта

37. consul
mongodb-smartos
rabbitmq
aerospike
crate
elasticsearch
mysql-cluster
rethinkdb
postgres-rds
zookeeper
chronos
disque
etcd
logcabin
percona
robustirc
cockroachdb
doc
galera
mongodb-rocks
postgres-rds
Примеры тестов

39. Test part #3 Установка AI
(defn install!
"Installs Apache Ignite on the given node."
[node version]
(c/sudo "ubuntu"
(c/cd "/tmp"
(c/exec :wget :-c (str "somelink"))
(c/exec :unzip :-q (str "somezipfile"))
(c/exec :mv :-f (str "dir1") "dir2")
(c/exec :mkdir "/tmp/dir2/jepsen"))))

40. Test part #4 Старт AI
(defn start!
"Starts Apache Ignite."
[node test]
(info node "starting ignite")
(c/sudo "ubuntu"
(c/cd "/tmp/apache-ignite-fabric"
(c/exec "bin/ignite.sh"
"jepsen/config.xml" :-v (c/lit ">node.log") (c/lit
"2>&1 &"))

41. Test part #5 Hardcore
(defrecord IgniteСlient [client node cache]
client/Client
(setup! [this test node]
(let [client (Ignition/start (str "/tmp/jepsen_config.client." (fixNodeId node) ".xml"))
cache (.getOrCreateCache client "jepsen_cache")]
(dotimes [i 100] (ignite-put cache i))
(assoc this :client client :cache cache)))
(invoke! [this test op]
(try
(case (:f op)
:read (assoc op :type :ok :value (ignite-get cache op))
:write (assoc op :type :ok :value (ignite-put cache op)))))
(teardown! [_ test]))

42. Test part #5
Everything looks good! ヽ (‘ ー `) ノ
https://aphyr.com/tags/jepsen

43. Итоги
Один для всех
Clojure

44. Ilya.suntsov
suntsov.ilya@gmail.com