Testing and Continuous Integration in iOS

Transcript

1. Tiago Martinho @martinho_t tiagomartinho Testing and Continuous Integration in iOS
2. Agenda (Testing) • Motivation • Unit Testing • TDD in iOS • Clean Architecture • UI Testing • Alternatives Frameworks • Other Types of Testing 2
3. Motivation 3
4. Motivation • Confidence • Regressions • Executable Documentation • Testable & Clean Design 4
5. Unit Testing 5
6. 6 Structure of a Unit Test func testArraySorting() { let input = [1, 7, 6, 3, 10] let output = input.sorted() XCTAssertEqual(output, [1, 3, 6, 7, 10]) } https://developer.apple.com/videos/play/wwdc2017/414/
7. 7 Structure of a Unit Test func testArraySorting() { let input = [1, 7, 6, 3, 10] let output = input.sorted() XCTAssertEqual(output, [1, 3, 6, 7, 10]) } input https://developer.apple.com/videos/play/wwdc2017/414/
8. 8 Structure of a Unit Test func testArraySorting() { let input = [1, 7, 6, 3, 10] let output = input.sorted() XCTAssertEqual(output, [1, 3, 6, 7, 10]) } Array.sorted input https://developer.apple.com/videos/play/wwdc2017/414/
9. 9 Structure of a Unit Test func testArraySorting() { let input = [1, 7, 6, 3, 10] let output = input.sorted() XCTAssertEqual(output, [1, 3, 6, 7, 10]) } Array.sorted input output https://developer.apple.com/videos/play/wwdc2017/414/
10. 10 Structure of a Unit Test Array.sorted input output https://developer.apple.com/videos/play/wwdc2017/414/
11. 11 Structure of a Unit Test Prepare input Array.sorted input output https://developer.apple.com/videos/play/wwdc2017/414/
12. 12 Structure of a Unit Test Prepare input Run the code being tested Array.sorted input output https://developer.apple.com/videos/play/wwdc2017/414/
13. 13 Structure of a Unit Test Prepare input Run the code being tested Verify output Array.sorted input output https://developer.apple.com/videos/play/wwdc2017/414/
14. “3-As" Pattern • Arrange • Act • Assert 14
15. XCTest • Xcode’s testing framework • Create and run unit tests, performance tests, and UI tests for your Xcode project. 15
16. 16 New Xcode Project with Unit Tests Hello XCTest
17. TDD 17
18. 18 Red Green Refactor
19. 19 Write a failing test Green Refactor
20. 20 Red Make the test pass Refactor
21. 21 Red Green Improve the code
22. 22 http://agilekatas.co.uk/katas/RockPaperScissors-Kata Programming Kata
23. 23 Characteristics of Testable Code https://developer.apple.com/videos/play/wwdc2017/414/
24. 24 Characteristics of Testable Code Control over inputs https://developer.apple.com/videos/play/wwdc2017/414/
25. 25 Characteristics of Testable Code Control over inputs Visibility into outputs https://developer.apple.com/videos/play/wwdc2017/414/
26. 26 Characteristics of Testable Code Control over inputs Visibility into outputs No hidden state https://developer.apple.com/videos/play/wwdc2017/414/
27. 27 https://github.com/emilybache/Racing-Car-Katas Hard to test code
28. 28 Testability Techniques Protocols and parameterization Separating logic and effects https://developer.apple.com/videos/play/wwdc2017/414/
29. Clean Architecture 29
30. Structure of the application 30 Framework Dependent Framework API Replaceable Not essential Sensor View … Database
31. Structure of the application 31 Framework Independent Service Presenter … Repository Use Cases Heart of the application Essential
32. Structure of the application 32 Framework Dependent Framework Independent Sensor View … Database Service Presenter … Repository ? ?
33. Structure of the application 33 Framework Dependent Framework Independent View Presenter Interfaces The interfaces should be written in terms of our domain
34. Structure of the application 34 Framework Dependent Framework Independent View Presenter Protocols In Swift interfaces are defined as Protocols
35. Practical Example 35
36. Practical Example Login App 36 Login Screen Main Screen
37. Practical Example 37 LoginViewController xib, storyboard, code extends UIViewController View
38. Practical Example 38 LoginViewController Framework Dependent (UIKit) View
39. Practical Example 39 LoginViewController View LoginPresenter LoginService
40. Practical Example 40 LoginViewController View LoginPresenter LoginService Framework Independent
41. Practical Example 41 LoginViewController View LoginPresenter LoginService Easy to: -Test -Port -Maintain
42. Practical Example Collaborators objects are injected 42 LoginPresenter LoginView a LoginView a LoginService LoginService
43. 43 https://github.com/elit-software/login-screen Framework Independent App
44. UI Testing 44
45. 45 Core Technologies + Accessibility XCTest https://developer.apple.com/videos/play/wwdc2015/406/
46. 46 https://github.com/elit-software/login-screen Hello UI Testing
47. Alternative Testing Frameworks 47
48. Quick + Nimble 48 https://github.com/Quick
49. KIF - Keep It Functional iOS Integration Testing Framework 49 https://github.com/kif-framework/KIF
50. Open source test automation framework for use with native, hybrid and mobile web apps. It drives iOS, Android, and Windows apps using the WebDriver protocol. 50 http://appium.io
51. EarlGrey Google iOS UI Automation Test Framework 51 https://github.com/google/EarlGrey
52. Calabash Automated acceptance testing for mobile apps 52 http://calaba.sh
53. Other Types of Testing 53
54. Asynchronous Testing 54 https://developer.apple.com/documentation/xctest/ asynchronous_tests_and_expectations/ testing_asynchronous_operations_with_expectations
55. Performance Testing 55 https://developer.apple.com/library/content/documentation/ Performance/Conceptual/EnergyGuide-iOS/ TestPerformance.html
56. Property-Based Testing 56 https://github.com/typelift/SwiftCheck
57. Continuous Integration 57
58. Agenda • Definition • Motivation • Continuous Deployment • Services • Setup 58
59. Definition • Integrate code into a shared repository several times a day 59
60. Motivation • Risk Reduction • Build and Deploy Automation • Tested Builds Available • Build and Test Results 60
61. “Every 3 weeks, we polish up the Pinterest app to make it faster and better than ever.” “To make our app better for you, we bring updates to the App Store every 2 weeks” 61
62. 62 Jenkins
64. 64 Pipeline
65. 65 fastlane
68. 68 Setup a Project with BuddyBuild
69. Other References https://developer.apple.com/videos/play/wwdc2015/406/ https://developer.apple.com/videos/play/wwdc2017/414/ http://alistair.cockburn.us/Hexagonal+architecture https://www.objc.io/issues/13-architecture/viper/ http://matteo.vaccari.name/blog/archives/154 http://www.dossier-andreas.net/software_architecture/ports_and_adapters.html http://www.growing-object-oriented-software.com http://www.natpryce.com/articles/000772.html https://www.youtube.com/watch?v=RLo6hs1uDLA https://developer.apple.com/videos/play/wwdc2015/408/ 69
70. Slides https:// speakerdeck.com/ tiagomartinho/testing- and-continuous- integration-in-ios# 70
71. Tiago Martinho @martinho_t tiagomartinho Thank you!