Better UI Testing With Swift Robots - Forward Swift, San Francisco, March 2017

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! ! ! ! ! ! ! ! ! ! Better UI testing with Swift Robots Forward Swift | San Francisco, CA | March 2017 @designatednerd | spothero.com | justhum.com ! ! ! ! ! ! ! ! ! !

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Preamble: UI vs. Unit Tests

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UI Testing Options

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KIF

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XCUI

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Earl Grey

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So which framework should you use?

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

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! ! ! ! ! ! ! ! ! ROBOTS ! ! ! ! ! ! ! ! !

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

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

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KIF XCUI

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With DRY refactoring:

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With Robots:

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Separate the What from the how

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More Composable test code

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ROBOTS * - sometimes known as controllers

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How do we steal adapt this idea for Swift?

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Protocols!

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KIF

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XCUI

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Earl Grey

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KIF XCUI

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Earl Grey

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Earl Grey

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Some gotchas with multiple variations

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

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MOAR PROTOCOLS!

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

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Using @testable import:

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

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Obligatory Summary Slide!

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

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

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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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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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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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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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Question Time!

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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