Mateusz Bryła Presentation from SkładQA #3, march 2018, Kraków.

1. SkładQA #3
Kraków, 2018 - Mateusz Bryła

2. Contract Testing

3. Agenda
- Baseline
- Contract
- Contract Testing
- Why (not)?
- Tools
- Example

4. Baseline

5. Interface
request
response
consumer producer

6. Interfaces within a service
module 3module 2
module 5
(third party)
module 1
module 4
module 6
(third party)

7. Partial interface
producer consumer 2
consumer 1
consumer 3
request A - response A
request B - response B
request B - response B
request A - response A

8. Microservices
service 1 service 3 service 5
service 4
service 2

9. Microservices - 3P
service 1 service 3 service 5
service 4
(third-party)
service 2

10. Contract

11. Interface
request
response
consumer producer

12. Contract
consumer producer
when request:
HTTP GET /echo/hello
then response:
HTTP 200
{
“echo”: “hello”
}

13. Contract Testing

14. Unit Tests
module 3
(test double)
module 2
(under test)
module 5
module 1
(test double)
module 4 module 6

15. Integration Test
service 1
(test double)
service 3
(under test)
service 5
(test double)
service 4
(test double)
service 2
(test double)

16. Single integration
service 1
service 3
(under test)
service 5
service 4
(test double)
service 2

17. Single integration - sideways ;)
service 3
(under test)
service 4
(test double)

18. Contract test
service
(under test)
service
when request:
HTTP GET /echo/hello
then response:
HTTP 200
{
“echo”: “hello”
}
tested against

19. tested against
Contract Test
when request:
HTTP GET /echo/hello
then response:
HTTP 200
{
“echo”: “hello”
}
service
(under test)
service

20. Single integration with third party - test double
service
(under test)
service
(test double)

21. Single integration with third party - sandbox
service
(under test)
service
(sandbox)

22. Contract test - third party
service
(under test)
service
(sandbox)
when request:
HTTP GET /echo/hello
then response:
HTTP 200
{
“echo”: “hello”
}
tested against

23. Contract test - third party
service
(under test)
service
(sandbox)
when request:
HTTP GET /echo/hello
then response:
HTTP 200
{
“echo”: “hello”
}
tested against

24. Why (not)?

25. Integration Test
service 1
(test double)
service 3
(under test)
service 5
(test double)
service 4
(test double)
service 2
(test double)

26. Single integration
service 1
service 3
(under test)
service 5
service 4
(test double)
service 2

27. Single integration with third party - test double
service
(under test)
service
(test double)

28. Single integration with third party - sandbox
service
(under test)
service
(sandbox)

29. Partial interface
producer consumer 2
consumer 1
consumer 3
request A - response A
request B - response B
request B - response B
request A - response A

30. Contract test - third party
service
(under test)
service
(sandbox)
when request:
HTTP GET /echo/hello
then response:
HTTP 200
{
“echo”: “hello”
}
tested against

31. Tools

32. Spring Cloud Contract
https://cloud.spring.io/spring-cloud-contract/
Pact
https://docs.pact.io/

33. Example

34. Java - shared contract
https://github.com/mbryla/contract-testing

35. Should we do it?

36. Q / A