Testing, CI and CD in the real world

1. Testing
continous Integration
continous Delivery
…in the real world!

2. Roc Boronat
I develop Android things


– I wanna learn about testing! – Roc 2014

3. tests
introducing

4. unitary tests

integration tests

instrumentation tests

5. we started with unitary tests to
develop regular expressions
^[6789]{1}[0-9]{8}$
^0{2}[0-9]{11,}

6. we started with unitary tests to
develop regular expressions

7. we started with unitary tests to
develop regular expressions

8. we started with unitary tests to
develop regular expressions

9. we started with unitary tests to
develop regular expressions
given
when
then
given
when
then

10. we started with unitary tests to
parse deeplink URL’s
this happens at

11. we started with unitary tests to
parse deeplink URL’s
this happens at

12. we started with unitary tests to
parse deeplink URL’s
this happens at

13. we started with unitary tests to
improve an invoice generator
Customer can have a insurance… or not
The insurance can have a coverage limit… or not
The insurance can have a franchise deductible… or not
The insurance company can pay the VAT of the amount… or not

14. we started with unitary tests to
improve an invoice generator

15. we started with unitary tests to
improve an invoice generator

16. we started with unitary tests to
refactor legacy code
this happens at

17. we started with unitary tests to
refactor legacy code
Sandro Mancuso
craftedws.blogspot.com
Testing and Refactoring Legacy Code
youtu.be/_NnElPO5BU0
Legacy Code Rules

•You cannot change production code if not covered by tests
… just automated refactorings (via IDE) are allowed, if needed to write the test
this happens at

18. we started with unitary tests to
refactor legacy code
Sandro Mancuso
craftedws.blogspot.com
Testing and Refactoring Legacy Code
youtu.be/_NnElPO5BU0
this happens at

19. last tips about unitary tests
follow the given-when-then style

test one thing at a time

test the domain: is easy and valuable

frustration is the first step towards improvement

know the tools: JUnit + AssertJ + Mockito

20. unitary tests

integration tests

instrumentation tests

21. we started with integration test to
develop an API module
this happens at
quit smoking with your phone

22. tips about integration tests
develop the API module by TDD

check that your customer’s API has not changed

monitor your own API using a CI tool

23. unitary tests

integration tests

instrumentation tests

24. we started with instrumentation test to
test an app end to end
this happens at

25. we started with instrumentation test to
test an app end to end
this happens at

26. we started with instrumentation test to
test an app end to end
this happens at

27. tips about instrumentation tests
simple way to do «defensive testing»

fast way to develop «deep screens»

Espresso has been a game changer

They use to fail at CI tools

28. extra point: TDD
test-driven development

29. extra point: TDD
test-driven development

30. extra point 2: EDD?
error-driven development
Someone found a bug?

Write a test that reproduces it before fixing it!

31. extra point 2: EDD?
error-driven development
this happens at

32. continous *
introducing

33. continous integration

continous delivery

34. we started with continous integration to
fail fast
this happens at
quit smoking with your phone

35. we started with continous integration to
fail fast
this happens at
quit smoking with your phone

36. we started with continous integration to
maintain code quality
this happens at

37. we started with continous integration to
maintain code quality
this happens at

38. continous integration

continous delivery

39. we started with continous delivery to
launch releases from SourceTree
Group of Betatesters 0,5% of users
this happens at
quit smoking with your phone

40. we started with continous delivery to
update stakeholders
the product owners have
the last developed feature
in their phones
this happens at

41. we started with continous delivery to
launch releases from Terminal
Group of Betatesters Alpha Release
this happens at

44. Roc Boronat
[email protected]