Better UI Testing with Swift Robots - CocoaConf Next Door San Jose, June 2017

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

Codez: https://github.com/designatednerd/GoCubs

Transcript

1. ! ! ! ! ! ! ! ! !
   -----------------------------------------
   Better UI testing with
   Swift Robots
   CocoaConf Next Door | San Jose, CA | June 2017
   @designatednerd | spothero.com | justhum.com
   -----------------------------------------
   ! ! ! ! ! ! ! ! !
   

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2. Preamble:
   UI vs. Unit Tests
   

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3. Unit Tests
   Testing small pieces of independent code
   

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4. UI Tests
   Try to use your application like a customer
   

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5. UI Tests
   Try to use your application like a customer
   

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6. UI Testing
   Frameworks
   

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7. KIF
   

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8. XCUI
   

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9. Earl Grey
   

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10. So which framework
    should you use?
    

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12. You can use this technique with
    any or every
    UI testing framework
    

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13. ! ! ! ! ! ! ! ! !
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    ROBOTS
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    ! ! ! ! ! ! ! ! !
    

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17. Separate the
    What
    from the
    how
    

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18. Separate the
    What
    from the
    how
    

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21. How can I steal adapt this idea
    for iOS?
    

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23. ಠ_ಠ
    wtf does that mean?
    

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

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

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

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31. K
    I
    F
    

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32. X
    C
    U
    I
    

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33. With DRY refactoring:
    KIF XCUI
    

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35. With Robots:
    

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37. ROBOTS
    * - aka controllers
    

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38. More Composable
    test code
    

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39. How can I steal improve this idea
    for Swift?
    

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40. Protocols!
    

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42. A brief interlude
    about #file and #line
    

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45. ANYWAY
    

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46. KIF
    

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47. XCUI
    

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48. Earl Grey
    

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50. KIF
    XCUI
    

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54. Earl Grey
    

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55. Earl Grey
    

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56. How does this technique
    scale
    for testing larger apps?
    

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64. Protocol-Oriented
    Gotchas
    

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66. Subclassing XCTest directly:
    ✅ class GoCubsXCUITests: XCTestCase {
    ❌ class GoCubsKIFTests: KIFTestCase {
    ✅ class GoCubsEarlGreyTests: XCTestCase {
    

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67. MOAR PROTOCOLS!
    

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69. Using the protocol instead:
    !!!!!!!!!!!!!!!!!!!!!!!!!!!!
    class GoCubsXCUITests: XCTestCase, RobotTests {
    class GoCubsKIFTests: KIFTestCase, RobotTests {
    class GoCubsEarlGreyTests: XCTestCase, RobotTests {
    !!!!!!!!!!!!!!!!!!!!!!!!!!!!
    

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73. Using @testable import:
    

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74. Using @testable import:
    ❌ class GoCubsXCUITests: XCTestCase, RobotTests {
    ✅ class GoCubsKIFTests: KIFTestCase, RobotTests {
    ✅ class GoCubsEarlGreyTests: XCTestCase, RobotTests {
    

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77. Obligatory Summary Slide!
    

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78. Obligatory Summary Slide!
    Robots will help you:
    - Separate what what from how
    

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79. Obligatory Summary Slide!
    Robots will help you:
    - Separate what what from how
    - Keep your tests readable
    

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80. Obligatory Summary Slide!
    Robots will help you:
    - Separate what what from how
    - Keep your tests readable
    - Swap out the underlying implementation
    

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81. Obligatory Summary Slide!
    Robots will help you:
    - Separate what what from how
    - Keep your tests readable
    - Swap out the underlying implementation
    FREE ADVICE:
    

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82. 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.
    

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83. 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/
    

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84. Question Time!
    

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85. 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
    

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