Better UI Testing with Swift Robots - Mobile Era Meetup 2017

My deck on using the Robot pattern for more readable, more flexible tests in Swift.

Includes a whole bunch of stuff towards the end I wasn't actually able to get to in the talk around #file and #line, as well as some of the gotchas of trying to make all the protocols talk to each other properly.

Please feel free to reach out on twitter to @designatednerd if you have follow-up questions.

Sample Code: https://github.com/designatednerd/GoCubs

Transcript

1. ! ! ! ! ! ! ! ! ! ----------------------------------------- Better UI testing with Swift Robots Mobile Era Community Meetup | Oslo | October 2017 @designatednerd | designatednerd.com | justhum.com ----------------------------------------- ! ! ! ! ! ! ! ! !
2. Preamble: UI vs. Unit Tests
3. Unit Tests Testing small pieces of independent code
4. UI Tests Try to use your application like a customer
5. UI Tests Try to use your application like a customer
6. UI Testing Frameworks
7. KIF
8. XCUI
9. Earl Grey
10. So which framework should you use?
12. You can use this technique with any or every UI testing framework
13. ! ! ! ! ! ! ! ! ! ------------------------- ROBOTS ------------------------- ! ! ! ! ! ! ! ! !
17. Separate the What from the how
18. Separate the What from the how
21. How can I steal adapt this idea for iOS?
23. ಠ_ಠ wtf does that mean?
27. Sample Code https://github.com/designatednerd/ GoCubs
28. Sample Code https://github.com/designatednerd/GoCubs
30. K I F
31. X C U I
32. With DRY refactoring: KIF XCUI
34. With Robots:
36. ROBOTS * - aka controllers
37. More Composable test code
38. How can I steal improve this idea for Swift?
39. Protocols!
41. A brief interlude about #file and #line
44. ANYWAY
45. KIF
46. XCUI
47. Earl Grey
49. KIF XCUI
53. Earl Grey
54. Earl Grey
55. How does this technique scale for testing larger apps?
61. Protocol-Oriented Gotchas
63. Subclassing XCTest directly: ✅ class GoCubsXCUITests: XCTestCase { ❌ class GoCubsKIFTests: KIFTestCase { ✅ class GoCubsEarlGreyTests: XCTestCase {
64. MOAR PROTOCOLS!
66. Using the protocol instead: !!!!!!!!!!!!!!!!!!!!!!!!!!!! class GoCubsXCUITests: XCTestCase, RobotTests { class GoCubsKIFTests: KIFTestCase, RobotTests { class GoCubsEarlGreyTests: XCTestCase, RobotTests { !!!!!!!!!!!!!!!!!!!!!!!!!!!!
70. Using @testable import:
71. Using @testable import: ❌ class GoCubsXCUITests: XCTestCase, RobotTests { ✅ class GoCubsKIFTests: KIFTestCase, RobotTests { ✅ class GoCubsEarlGreyTests: XCTestCase, RobotTests {
74. Obligatory Summary Slide!
75. Obligatory Summary Slide! Robots will help you: - Separate what what from how
76. Obligatory Summary Slide! Robots will help you: - Separate what what from how - Keep your tests readable
77. Obligatory Summary Slide! Robots will help you: - Separate what what from how - Keep your tests readable - Swap out the underlying implementation
78. Obligatory Summary Slide! Robots will help you: - Separate what what from how - Keep your tests readable - Swap out the underlying implementation FREE ADVICE:
79. Obligatory Summary Slide! Robots will help you: - Separate what what from how - Keep your tests readable - Swap out the underlying implementation FREE ADVICE: - Giving techniques cool names makes it way more likely people will steal use them.
80. Links! — Earl Grey: https://github.com/google/EarlGrey — KIF: https://github.com/kif-framework/KIF — Jake Wharton on Kotlin Robots: https://realm.io/ news/kau-jake-wharton-testing-robots/ — Joe Masilotti on XCTest Helpers: http:// masilotti.com/xctest-helpers/
81. Question Time!
82. Photo Credits! — "Earl Grey" by Ana Ulin https://www.flickr.com/ photos/anaulin/164424396/ — "maybe now I'll get my texts" by frankieleon https:// www.flickr.com/photos/armydre2008/3935008214 — Cubs Winning The World Series, by Matt Slocum, AP https://www.nytimes.com/2016/11/03/sports/ baseball/chicago-cubs-beat-cleveland-indians- world-series-game-7.html