Testes - A que será que se destina?

Uma talk baseada em exemplos reais de implementações de testes, a partir de experências práticas e conceitos teóricos. Os objetivos são: encorajar a implementação da cultura de testes; Para aqueles que já o fazem, aprimorar a qualidade de testes implantados; E que o conteúdo apresentado seja orientador para os que se interessem pelo tema.

Transcript

1. Testes: A que será
   que se destina?
   Breve história sobre testes, boas e más práticas no ecossistema
   Apple
   Ronan Rodrigo Nunes
   

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2. Arqueologia
   

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4. …1956
   Debugging-oriented
   Sem distinção entre testes e
   debugging
   

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5. 1957 ~ 78
   Demonstration-oriented
   Garantir o atendimento de
   requisitos de software
   

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6. 1979 ~ 82
   Destruction-Oriented
   Detectar falhas de implementações
   

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7. 1983 ~ 87
   Evaluation-Oriented
   Detectar falhas nos requisitos e no
   design e implementação
   

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8. 1988…
   Prevention-Oriented
   Evitar falhas nos requisitos, design
   e implementação
   

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9. 2003
   Xcode 1.0
   Sem tool para testes
   

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10. 2005
    Xcode 2.1
    Primeira versão com suporte a
    testes unitários (OCUnit)
    

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11. 2007
    Xcode 3.0
    Primeiro com SDK do iOS
    

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12. 2013
    Xcode 5.0
    Substituição do OCUnit por XCTest
    

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13. 2015
    Xcode 7.0
    Primeiro com XCUITest
    

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14. Cultura
    

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16. Meu código funciona
    perfeitamente, por
    que eu testaria?
    “
    

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17. Não vejo benefício;
    “
    

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18. Até APP com testes
    tem bugs
    “
    

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19. Não sei como, nem o
    que testar.
    “
    

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20. Não temos tempo
    “
    

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21. É difícil e complicado
    “
    

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22. Como melhorar a
    cultura de testes do
    meu time?
    “
    http://mobster.cc
    

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23. O que testar
    

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24. Pirâmide de
    testes
    

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25. Unit
    Integration
    UI
    Mais
    Isolamento
    Mais
    Integração
    Rápido
    Lento
    

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26. Boas práticas &
    Smells &
    Armadilhas
    

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27. func test_primaryButtonTapped_doesRouteToFullSheet() {
    // given
    XCTAssertTrue(router.routeToFullSheetCallCount == 0)
    // when
    interactor.primaryButtonTapped()
    // then
    XCTAssertTrue(router.routeToFullSheetCallCount == 1)
    }
    ✘
    

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28. func test_primaryButtonTapped_doesRouteToFullSheet() {
    XCTAssertTrue(router.routeToFullSheetCallCount == 0)
    interactor.primaryButtonTapped()
    XCTAssertTrue(router.routeToFullSheetCallCount == 1)
    }
    ✘
    

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29. func test_primaryButtonTapped_doesRouteToFullSheet() {
    interactor.primaryButtonTapped()
    XCTAssertTrue(router.routeToFullSheetCallCount == 1)
    }
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30. func test_primaryButtonTapped_doesRouteToFullSheet() {
    interactor.primaryButtonTapped()
    XCTAssertEqual(router.routeToFullSheetCallCount, 1)
    }
    ✔
    

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31. func test_startReport_doesRouteToReportFlow() {
    interactor.startReport()
    XCTAssertEqual(router.routeToReportFlowCallCount, 1)
    }
    ✔
    

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32. func test_allByMonth_existingMonth_callCompletionWithItems() {
    var expectedGroupedFoods: [GroupedFoods]?
    // ...
    guard let expectedGroupedFoods = expectedGroupedFoods,
    firstGroup = expectedGroupedFoods.first else {
    XCTFail("empty expectedGroupedFoods")
    }
    XCTAssertFalse(firstGroup.foods.isEmpty)
    }
    ✘
    

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33. func test_allByMonth_existingMonth_callCompletionWithItems() {
    var expectedGroupedFoods: [GroupedFoods]?
    // ...
    XCTAssertFalse(expectedGroupedFoods!.first!.foods.isEmpty)
    }
    ✘
    

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34. func test_allByMonth_existingMonth_callCompletionWithItems() {
    var expectedGroupedFoods: [GroupedFoods]?
    // ...
    if let expectedGroupedFoods = expectedGroupedFoods {
    if let firstGroup = expectedGroupedFoods.first {
    XCTAssertFalse(firstGroup.foods.isEmpty)
    }
    }
    }
    ✘
    

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35. func test_allByMonth_existingMonth_callCompletionWithItems() {
    var expectedGroupedFoods: [GroupedFoods]?
    // ...
    XCTAssertEqual(expectedGroupedFoods?.first?.foods.isEmpty,
    false)
    XCTAssertEqual(expectedGroupedFoods?.first?.foods.count, 4)
    }
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36. func test_allByMonth_existingMonth_callCompletionWithItems() {
    var expectedGroupedFoods: [GroupedFoods]?
    let month = MonthGatewayFactory.make().month(number: 1)
    gateway.all(byMonth: month) { expectedGroupedFoods = $0.data }
    XCTAssertEqual(expectedGroupedFoods?.isEmpty, false)
    }
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37. func test_allByMonth_existingMonth_callCompletionWithItems() {
    var expectedGroupedFoods: [GroupedFoods]?
    let month = MonthGatewayFactory.make().month(number: 1)
    gateway.all(byMonth: month) {
    expectedGroupedFoods = $0.data
    }
    XCTAssertEqual(expectedGroupedFoods?.isEmpty, false)
    }
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38. func test_finishReport_completeFlow() {
    var completed = false
    interactor.waitForCompletion().subscribe { _ in
    completed = true
    }
    .disposed(by: disposeBag)
    interactor.finish()
    XCTAssertTrue(completed)
    }
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39. func test_finishReport_completeFlow() {
    var completed = false
    onCompleteFlow(completed = true)
    interactor.finish()
    XCTAssertTrue(completed)
    }
    func onCompleteFlow(_ fn: @escaping @autoclosure () -> ()) {
    interactor.waitForCompletion()
    .subscribe { _ in fn() }
    .disposeOnTearDown(testCase: self)
    }
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40. class ReportTripInteractorTests: XCTestCase
    class ReportTripInteractor_StartTripTests:
    ReportTripInteractorTests
    class ReportTripInteractor_FinishingTripTests:
    ReportTripInteractorTests
    class ReportTripInteractor_SearchingTripTests:
    ReportTripInteractorTests
    class ReportTripInteractor_WaintingTripTests:
    ReportTripInteractorTests
    ✔
    

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41. func test_start_validInteractor_createEventAtStream() {
    let expectedResponse = Response(uuid: "id")
    shareService.fetchHandler = { _ in .just(expectedResponse) }
    worker.start(interactor)
    someStream.dataSubject
    .subscribe(onNext: { eventResponse in
    XCTAssertEqual(expectedResponse, eventResponse)
    })
    .disposed(by: disposeBag)
    }
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42. class Worker {
    func start(_ interactor: AnyInteractor) {
    someObservable
    .subscribe(someStream.dataSubject)
    .disposeOnStop(self)
    }
    }
    .subscribe(someStream.dataSubject)
    

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43. class Worker {
    func start(_ interactor: AnyInteractor) {
    someObservable
    .disposeOnStop(self)
    }
    }
    

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44. func test_start_validInteractor_createEventAtStream() {
    let expectedResponse = Response(uuid: "id")
    shareService.fetchHandler = { _ in .just(expectedResponse) }
    var eventResponse: Response?
    someStream.dataSubject
    .subscribe(onNext: { eventResponse = $0 })
    .disposed(by: disposeBag)
    worker.start(interactor)
    XCTAssertEqual(expectedResponse, eventResponse)
    }
    ✔
    

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45. final class ListFoodPresenterViewControllerTests: XCTestCase {
    private let bindable: ListFoodTableViewControllerBindMock!
    private let presenter: ListFoodPresenterViewController!
    override func setUp() {
    super.setUp()
    bindable = ListFoodTableViewControllerBindMock()
    presenter = ListFoodPresenterViewController()
    presenter.bindable = bindable
    }
    }
    !
    

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46. final class ListFoodPresenterViewControllerTests: XCTestCase {
    private let bindable = ListFoodTableViewControllerBindMock()
    private let presenter = ListFoodPresenterViewController()
    override func setUp() {
    super.setUp()
    presenter.bindable = bindable
    }
    }
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47. final class ListFoodPresenterViewControllerTests: XCTestCase {
    private let bindable = ListFoodTableViewControllerBindMock()
    private lazy var presenter: ListFoodPresenterViewController = {
    let presenter = ListFoodPresenterViewController()
    presenter.bindable = bindable
    return presenter
    }()
    }
    ✔
    

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48. Obrigado
    

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49. Obrigado
    ronanrodrigo.com
    

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