This document discusses testing the integration between services. It covers unit testing, integration testing, and end-to-end testing. It also discusses architectures like hexagonal and build pipelines. Key aspects covered include testing synchronous and asynchronous interactions over HTTP, REST, and Kafka. Schemas and data representations for payments are defined.

1. Testando a integração
entre serviços
Lucas Cavalcanti
@lucascs
https://github.com/lucascs

2. Um pouco de contexto

4. Sistema
http://en.wikipedia.org/wiki/File:MasterCard_Logo.svg
https://www.flickr.com/photos/pargon/2444943158/
http://commons.wikimedia.org/wiki/File:POS_device.jpg

5. Transações
Faturas
Contas e Limites
Dados do cliente
MasterCard-client
Dados de usuário
Localização
Notificações

6. Serviços
Clojure
iOS Android
Web
http://commons.wikimedia.org/wiki/File:Google_Chrome_icon_(2011).png
http://commons.wikimedia.org/wiki/File:Mac.svg
http://commons.wikimedia.org/wiki/File:Android_robot.png
https://registry.hub.docker.com/_/clojure/

7. Integração
Síncrona Assíncrona
HTTP
REST
Hypermedia
Kafka
JSON
mensagens padronizadas

8. Schemata
(ns common-schemata.wire.payment)
(def links {:self {:schema link-schema
:allow #{:get}
:description "Entity. The owner should be able to GET it.”}})
(def skeleton
{:_links {:schema (csc/gen-schema links)}
:id {:required true :eg #uuid "d6e73cc5-95bc-496a-951c-87f11af0d838"
:schema UUID}
:post-date {:required true :eg #nu/date "2013-10-23"
:schema LocalDate}
:account-id {:required false :eg #uuid "d6e73cc5-95bc-496a-951c-87f11af0d839"
:schema UUID}
:time {:required false :eg #nu/time "2013-10-23T11:53:26Z"
:schema LocalDateTime}
:amount {:required false :eg 133700
:schema t-money/cents}
:precise-amount {:required false :eg 1337.00M
:schema t-money/precise-amount}})

9. Arquitetura Hexagonal
http://www.dossier-andreas.net/software_architecture/ports_and_adapters.html
http://alistair.cockburn.us/Hexagonal+architecture

10. Testes de unidade

11. Testes de unidade

12. Testes de unidade

13. Testes de Unidade
(def internal-payment {:payment/id payment-id
:line-item/precise-amount -10.00M
:line-item/amount -1000
:line-item/account {:account/id account-id}
:line-item/time (time/date-time 2014 5 14 2 59 59)
:line-item/post-date (time/date 2014 5 13)})
(def external-payment {:id payment-id
:amount 1000
:paid -1000
:time (time/date-time 2014 5 14 2 59 59)
:post-date (time/date 2014 5 13) })
(sm/with-fn-validation
(fact “adapts internal representation to external”
(a-pmt/internal->wire internal-payment) => {:payment external-payment}))

14. Testes de integração
Contas
HTTP
Kafka msg
HTTP
Kafka msg

15. Testes de integração
(fact "a new account is created on April”
(as-of (time/date-time 2020 4 2 13 37 42)
(next-state) => :account-created))
(fact "a purchase is made some days later”
(as-of (time/date-time 2020 4 4 13 37 0)
(next-state) => :with-txs))
(fact "as well as a payment”
(as-of (time/date-time 2020 4 6 13 37 0)
(next-state) => :paid-some-money))
(fact "they are all there”
(as-of (time/date-time 2020 4 9 13 37 0)
(next-state) => :with-stuff-appearing-on-the-bill))
(fact "we close the bill”
(as-of (time/date-time 2020 4 5 13 37 0)
(next-state) => :bill-closed))
(fact "two bills we now have”
(as-of (time/date-time 2020 6 8 13 37 0)
(next-state) => :bill-containing-new-charge))

16. Testes ponta a ponta
MasterCard-client
MasterCard-mock
Aquisição
Contas
Notificações

17. Testes ponta a ponta
describe "until account creation" do
it "adds a prospect to the waiting list" do...end
it "initiates an account request on behalf of a prospect" do...end
it "gets all account requests associated with the prospect" do...end
it "the new account request has a waiting status" do...end
it "sends an email invitation, including an invite code" do...end
it "fails to start the acquisition process with the wrong invite-code" do...end
it "engages, using the invite-code from the email" do...end
#...
end

18. Build pipeline

19. Build pipeline

20. Pendente
Testes Exploratórios
Testes Performance
Testes Carga

21. Obrigado!
Lucas Cavalcanti
@lucascs
https://github.com/lucascs
www.nubank.com.br