Tests

1- definitions
2- tools
3- iOS frameworks

Transcript

1. Tests Thibaut Coutard iOS developer @MobiApps
2. Why ?
3. Why ? • More stable applications • Less bugs • More confidence • Use it as documentation
4. -Djikstra « Testing shows the presence, not the absence of bugs »
5. What kind of tests
6. Tests pyramid Manual UI Tests Integration Tests Unit tests
7. Integration Tests UI Tests Manual Cost Unit tests
8. Unit Test • Individual test • Unit smallest part of the system • Simplest way to test • Lowest cost • Few seconds
9. Integration Test • Interaction between components • At least two or more components • Less tests than UT • Relatively low cost • Seconds/Minutes
10. UI Test • Test the whole system • Still automated • Harder to test • Still cheaper than manually • Minutes/Hours
11. Manual Test • Test the whole system • Hard to test all cases • Very Expensive • Hours/Days
12. Feedback loop • Time between creating a bug and fixing it
13. Mutation Testing
14. Mutation Testing
15. Mutation Testing • Test the tests
16. TDD Red Green Write failing test Develop Refactor
17. BDD • Gherkin : Given/When/Then • Understandable by everyone • Speaks about the user behavior and not the technical behavior • Written with both product, development teams and customer
18. « What goes in production is the developers understanding »
19. Tools
20. Dependency Injection UserInteractor UserDefaults
21. Dependency Injection UserInteractor UserDefaults
22. Dependency Injection UserInteractor UserDefaults UserStoreProtocol
23. Dummy
25. Fake • Return static values
27. Stub • Return values • Can be set during the test
28. Stub
29. Spy • Spy the calls
31. Mock • Return values • Can be set during the test • Spy the calls
33. Humble Objects ViewController
34. Humble Objects ViewController Presenter
35. Humble Objects ViewController Presenter Not testable Testable
36. Useful libraries
37. XCTests • Unit test Framework native
38. XCTests
39. XCUITest • Native UI Test framework • Record from usage
40. XCUITest • Native UI Test framework • Record from usage
41. Nimble • A matcher framework for swift and objective-c • Easier to read than XCTests
42. Nimble
43. Quick • BDD framework for swift and objective-c • Can be written using the specifications • Easier to read and write
44. Quick
45. OHHttpStub • Stub HTTP calls for the whole app • Helps test API wrappers • Can simulate bad/no network
46. OHHttpStub • Stub HTTP calls for the whole app • Helps test API wrappers
47. KIF • Functional testing • Easier than XCUITests
48. KIF • Functional testing • Easier than XCUITests
49. HS : Sourcery • Meta Programming • Generate code • Awesome AutoMockable template
50. HS : Sourcery • Meta Programming • Generate code • Awesome AutoMockable template
51. Resources • Test Driven iOS Development with Swift 4 • https://github.com/kif-framework/KIF • https://github.com/Quick/Nimble • https://github.com/Quick/Quick • https://github.com/AliSoftware/OHHTTPStubs