Swift Testing and Architecture

Transcript

1. Testing
   @DanToml
   

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2. What?
   Test
   noun: A procedure intended to establish the quality,
   performance, or reliability of something, especially
   before it is taken into widespread use.
   

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3. Why?
   

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4. Tools
   

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5. XCTest
   // Contrived example test for a mythical add function
   func test_can_add_two_numbers() {
   // arrange
   let firstNumber = 1
   let secondNumber = 1
   let expectedResult = 2
   // act
   let ! = add(firstNumber, secondNumber)
   // assert
   XCTAssertEqual(!, expectedResult)
   }
   

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6. FBSnapshotTestCase
   // https://github.com/facebook/ios-snapshot-test-case
   func test_taylor_swift_view_displays_correct_image() {
   let viewModel = TaylorSwiftImageViewModel.testViewModel()
   let sut = TaylorSwiftImageView(viewModel: viewModel)
   FBSnapshotVerifyView(sut)
   }
   

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7. OHHTTPStubs
   OHHTTPStubs.stubRequestsPassingTest({$0.URL!.host == "mywebservice.com"}) { _ in
   // Stub it with our "wsresponse.json" stub file (which is in same bundle as self)
   let fixture = OHPathForFile("wsresponse.json", self.dynamicType)
   return OHHTTPStubsResponse(fileAtPath: fixture!,
   statusCode: 200, headers: ["Content-Type":"application/json"])
   }
   

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8. UI Testing
   

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9. Code Coverage
   

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10. Architecture
    

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11. Modal View Controller
    

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12. Massive View Controller
    

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13. Breaking it out
    

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14. MVVM
    Model-View-ViewModel
    

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15. Dependency Injection &
    Composability
    

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16. Clarity
    

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17. Use what works for you
    

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18. Lets talk about Testing
    

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19. Singletons
    

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20. View Models
    

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21. Views
    

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22. View Controllers
    

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23. Non-View Controllers
    

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24. Resources
    4 I'll be releasing a sample project on GitHub at some
    point in the next week or two.
    4 ObjC.io VIPER: http://bit.ly/1Ht1V6Y
    4 ObjC.io MVVM: http://bit.ly/1UNLXJf
    4 ObjC.io Lightweight View Controllers: http://bit.ly/
    1K1wAtw
    4 WWDC Session 229
    

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25. Questions?
    Find me on Twitter: @dantoml
    

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