Tackling developers in the heart of testing world

Write tests should be a practice that we need to do every time when we are developing software, the talk was an introduction to start in the testing world.

Transcript

1. Tackling developers in the heart of testing world Erik Jhordan González Reyes Mobile Engineer at Segundamano erik.gonzalez@schibsted.com.mx @ErikJhordan_Rey github.com/erikcaffrey
2. / SCHIBSTED MEDIA GROUP Erik Jhordan Rey “Mobile Engineer believer on software architecture, design patterns, clean code, solid and testing.” Mobile Engineer at Segundamano
3. / SCHIBSTED MEDIA GROUP Presence in 30 Countries Y seguimos creciendo MÉXICO Colombia Chile Brasil República Dominicana LATINOAMÉRICA Noruega Suecia Finlandia Bélgica Francia ESCANDINAVIA / EUROPA Portugal Alemania Polonia España Italia Irlanda Suiza Austria Hungría Rumania Bielorrusia Reino Unido Marruecos ÁFRÍCA Túnez Malasia Indonesia Singapur Vietnam Tailandia Bangladés ASIA / OCEANÍA
4. “Segundamano is the quickest and easiest way for people like you to sell and buy used things”
5. Mobile Team ➔ Carmen Salvador ➔ Diego Ramirez ➔ Ivan Alvarez Frias ➔ Juan Pablo Villa ➔ Quentin Désert ➔ Arturo Gutierrez ➔ Jose Luis Cadena ➔ Ranferi Dominguez
6. ➔ UI ➔ Performance ➔ Arquitectura ➔ Tools Android Smells
7. Technical Debt
8. Technical Debt ➔ Does team have the same level? ➔ Is it easy to onboard new people? ➔ Is the code consistent? ➔ Is hard to maintain? ➔ Can we add a new functionality fast? ➔ Can we get kpi’s on easy way? ➔ Can measure and monitoring the app? ➔ Is our code base preparate to scale? ➔ Is our code preparate to write test?
9. Architecture
10. / SCHIBSTED MEDIA GROUP ➔ Passes all tests ➔ Reveal al idea ➔ No Duplication ➔ Minimized classes and methods Simple design
11. / SCHIBSTED MEDIA GROUP Decoupled Architecture
12. / SCHIBSTED MEDIA GROUP View Presenter ViewController Use Case Use Case Use Case Domain Model Data Source Implementation Repository Repository Data Source Data Source Data Source Implementation Presentation Layer Domain Layer Data Layer Navigator
13. Testing
14. / SCHIBSTED MEDIA GROUP Testing Testing is the process of executing a program with the intent of finding errors… Glenford J Myers
15. “Depend upon abstractions. Do not depend upon concrete classes”
16. What motivates you to write test?
17. It is your responsibility
18. The only way to make refactor
19. It’s a tool for design
20. It’s Money
21. Validate our software
22. Document Behavior our System
23. Test Driven Development
24. “Bad code affect your customers, Martin Fowler”
25. Unit Testing
26. / SCHIBSTED MEDIA GROUP
27. “Unit test are not silver bullets”
28. / SCHIBSTED MEDIA GROUP FIRST Fast Independent Repeatable Self-validating Timely
29. Test Doubles
30. / SCHIBSTED MEDIA GROUP Test Doubles Dummy Stub Spy Mock Fake
31. / SCHIBSTED MEDIA GROUP Dummy objects are passed around but never actually used. Usually they are just used to fill parameter lists.
32. / SCHIBSTED MEDIA GROUP Stubs Provide canned answers to calls made during the test, usually not responding at all to anything outside what's programmed in for the test.
33. / SCHIBSTED MEDIA GROUP Spies Are stubs that also record some information based on how they were called. One form of this might be an email service that records how many messages it was sent.
34. / SCHIBSTED MEDIA GROUP Mock Are pre-programmed with expectations which form a specification of the calls they are expected to receive. They can throw an exception if they receive a call they don't expect and are checked during verification to ensure they got all the calls they were expecting.
35. / SCHIBSTED MEDIA GROUP Fake Objects actually have working implementations, but usually take some shortcut which makes them not suitable for production (an InMemoryTestDatabase is a good example).
36. / SCHIBSTED MEDIA GROUP Arrange Act Assert
37. Testing on Android
38. / SCHIBSTED MEDIA GROUP Building Testing Pipeline
39. “Test my http client requests and responses”
40. “Test my code implements the business”
41. “Test user is watching UI expected”
42. Testing tools
43. / SCHIBSTED MEDIA GROUP Testing tools Hamcrest JUnit Mockito Espresso
44. / SCHIBSTED MEDIA GROUP O’Reilly Free Programming The main goal is to practice good practices, architecture and testing. https://github.com/erikcaffrey/oreilly-books-android
45. • Depend on abstractions do not depend on concrete class • Use design patterns on smart way • Maintain a clean code style • Write Clean and Solid Code • Favor composition over inheritance • If your code is coupled the Refactor is your friend • Write test is your responsibility • Understand the tools before used it • Automatize Advices
46. Questions? Find me Erik Jhordan González Reyes Mobile Engineer github.com/erikcaffrey erik.gonzalez@schibsted.com.mx erikcaffrey.github.io @ErikJhordan_Rey +Erik Jhordan Rey
47. 01 02 http://www.wiley.com/WileyCDA/WileyTitle/productCd-1118031962.html The art of Software Testing https://www.amazon.es/Test-Driven-Development-Addison-Wesley-Signature/dp/0321146530 TDD - Kent Beck 03 Further Reading https://goo.gl/sduh0M Clean Code
48. Thank You! Androidnights