Pragmatic Mobile Testing Strategies

As software engineers, we found problems to write automated tests, this talk it's about strategies to ensure write reliable tests.

Transcript

1. Pragmatic Mobile Testing Strategies Erik Jhordan Rey Android Tech Lead at Segundamano erik.gonzalez@schibsted.com @ErikJhordan_Rey github.com/erikcaffrey
2. / SCHIBSTED MEDIA GROUP Erik Jhordan Rey Passionate about write quality code, focused to improving the profession of software development. Android Tech Lead 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. Why writing high-quality software is complicated?
5. / SCHIBSTED MEDIA GROUP Failed Software Development There are a lot of reasons why a software development project can fail but one of the most common reason is:
6. Software Engineers forgetting to write automated tests!!
7. Testing?
8. / SCHIBSTED MEDIA GROUP Testing Testing is the process of executing a program with the intent of finding errors… Glenford J Myers
9. Excuses used to avoid write tests
10. Scared to show that code works as expected.
11. Requires time...
12. Short deadlines
13. People don't understand the value
14. Why motivates you to write test?
15. It’s professional
16. It is our responsibility
17. Give value to users & teammates
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. “Bad code affect your customers, Martin Fowler”
24. As Software engineers, we found problems to write automated tests.
25. Our code is not ready to be tested.
26. Developers start writing tests without knowing what to test and how to test it.
27. Unreliable Tests ( falses / positives)
28. Code coverage != Test quality
29. “Mock” everywhere
30. “Verify” everywhere
31. Strong follower of Mike Cohn’s Test Pyramid
32. / SCHIBSTED MEDIA GROUP Reliability Testing We are wasting time & life if we don't have reliable tests.
33. Testable Code + Testing Strategies
34. Testable Code
35. Dependency Inversion Principle
36. “Your code should always depend on abstractions and not concretions”
37. / SCHIBSTED MEDIA GROUP Dependency Inversion Principle Hide implementation details creating layers with different responsibilities.
38. SMMX Clean Architecture
39. / SCHIBSTED MEDIA GROUP
40. Testing Strategies
41. What do we need to test?
42. Business logic & Requirements
43. / SCHIBSTED MEDIA GROUP Business Logic We need to test the application implements the business rules.
44. Integration with API
45. / SCHIBSTED MEDIA GROUP Server Side API integration The software should be prepared to alter software state according to Http Responses / Requests and JSON parsing expected.
46. Integration with Persistence Library
47. / SCHIBSTED MEDIA GROUP Persistence integration The queries we write to handle data from/to the local DB is working with our system correctly.
48. UI Components
49. / SCHIBSTED MEDIA GROUP UI Componets it's common to write custom views to be reused in a lot of places of the application so we need to ensure are working as expected.
50. App User Interface
51. / SCHIBSTED MEDIA GROUP User Interface The user is watching the expected UI according to app interactions and actions.
52. How to test it?
53. / SCHIBSTED MEDIA GROUP
54. / SCHIBSTED MEDIA GROUP Testing Stack hiding Implementation details, you can use test doubles • JUnit • Mockito • Hamcrest • MockWebServer or WireMock • Persistence Room Testing • Expresso • Barista • Shot
55. Show me code!
56. Business logic & Requirements
57. / SCHIBSTED MEDIA GROUP Business Logic hiding Implementation details, you can use test doubles
58. / SCHIBSTED MEDIA GROUP Verify create verify tests is not enough
59. / SCHIBSTED MEDIA GROUP Ensure Software States Check the final software state.
60. Integration with API
61. / SCHIBSTED MEDIA GROUP Server Side API integration hiding Implementation details, you can use test doubles
62. / SCHIBSTED MEDIA GROUP Request contains headers hiding Implementation details, you can use test doubles
63. / SCHIBSTED MEDIA GROUP Request in correct endpoint hiding Implementation details, you can use test doubles
64. / SCHIBSTED MEDIA GROUP Mock JSON response AccountResponse.json hiding Implementation details, you can use test doubles
65. / SCHIBSTED MEDIA GROUP Parsing JSON correctly hiding Implementation details, you can use test doubles
66. / SCHIBSTED MEDIA GROUP Server Side Api Integration Kotlin Sample to practice Integration Test https://github.com/erikcaffrey/kotlin-integration-test
67. Integration with Persistence Library
68. / SCHIBSTED MEDIA GROUP Persistence integration hiding Implementation details, you can use test doubles
69. / SCHIBSTED MEDIA GROUP Handling Queries hiding Implementation details, you can use test doubles
70. UI Components
71. / SCHIBSTED MEDIA GROUP UI components hiding Implementation details, you can use test doubles
72. / SCHIBSTED MEDIA GROUP UI Behaviors & States hiding Implementation details, you can use test doubles
73. App User Interface
74. / SCHIBSTED MEDIA GROUP App UI hiding Implementation details, you can use test doubles
75. / SCHIBSTED MEDIA GROUP Screenshot Testing hiding Implementation details, you can use test doubles Test framework that checks for visual differences across changes. com.package.segundamano.ads.AdsHolderScreenshots_expiredAd.png
76. Do you think automated software testing matters?
77. Thank You! QA Minds
78. 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 04 Testad malditos - Jorge Barroso https://www.youtube.com/watch?v=vlorWIlPgY0
79. https://goo.gl/ZWmJPR
80. Questions? Find me Erik Jhordan Rey Android Tech Lead github.com/erikcaffrey erik.gonzalez@schibsted.com erikcaffrey.github.io @ErikJhordan_Rey +Erik Jhordan Rey