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
2. Arqueologia
4. …1956 Debugging-oriented Sem distinção entre testes e debugging
5. 1957 ~ 78 Demonstration-oriented Garantir o atendimento de requisitos de software
6. 1979 ~ 82 Destruction-Oriented Detectar falhas de implementações
7. 1983 ~ 87 Evaluation-Oriented Detectar falhas nos requisitos e no design e implementação
8. 1988… Prevention-Oriented Evitar falhas nos requisitos, design e implementação
9. 2003 Xcode 1.0 Sem tool para testes
10. 2005 Xcode 2.1 Primeira versão com suporte a testes unitários (OCUnit)
11. 2007 Xcode 3.0 Primeiro com SDK do iOS
12. 2013 Xcode 5.0 Substituição do OCUnit por XCTest
13. 2015 Xcode 7.0 Primeiro com XCUITest
14. Cultura
16. Meu código funciona perfeitamente, por que eu testaria? “
17. Não vejo benefício; “
18. Até APP com testes tem bugs “
19. Não sei como, nem o que testar. “
20. Não temos tempo “
21. É difícil e complicado “
22. Como melhorar a cultura de testes do meu time? “ http://mobster.cc
23. O que testar
24. Pirâmide de testes
25. Unit Integration UI Mais Isolamento Mais Integração Rápido Lento
26. Boas práticas & Smells & Armadilhas
27. func test_primaryButtonTapped_doesRouteToFullSheet() { // given XCTAssertTrue(router.routeToFullSheetCallCount == 0) // when interactor.primaryButtonTapped() // then XCTAssertTrue(router.routeToFullSheetCallCount == 1) } ✘
28. func test_primaryButtonTapped_doesRouteToFullSheet() { XCTAssertTrue(router.routeToFullSheetCallCount == 0) interactor.primaryButtonTapped() XCTAssertTrue(router.routeToFullSheetCallCount == 1) } ✘
29. func test_primaryButtonTapped_doesRouteToFullSheet() { interactor.primaryButtonTapped() XCTAssertTrue(router.routeToFullSheetCallCount == 1) } ✘
30. func test_primaryButtonTapped_doesRouteToFullSheet() { interactor.primaryButtonTapped() XCTAssertEqual(router.routeToFullSheetCallCount, 1) } ✔
31. func test_startReport_doesRouteToReportFlow() { interactor.startReport() XCTAssertEqual(router.routeToReportFlowCallCount, 1) } ✔
32. func test_allByMonth_existingMonth_callCompletionWithItems() { var expectedGroupedFoods: [GroupedFoods]? // ... guard let expectedGroupedFoods = expectedGroupedFoods, firstGroup = expectedGroupedFoods.first else { XCTFail("empty expectedGroupedFoods") } XCTAssertFalse(firstGroup.foods.isEmpty) } ✘
33. func test_allByMonth_existingMonth_callCompletionWithItems() { var expectedGroupedFoods: [GroupedFoods]? // ... XCTAssertFalse(expectedGroupedFoods!.first!.foods.isEmpty) } ✘
34. func test_allByMonth_existingMonth_callCompletionWithItems() { var expectedGroupedFoods: [GroupedFoods]? // ... if let expectedGroupedFoods = expectedGroupedFoods { if let firstGroup = expectedGroupedFoods.first { XCTAssertFalse(firstGroup.foods.isEmpty) } } } ✘
35. func test_allByMonth_existingMonth_callCompletionWithItems() { var expectedGroupedFoods: [GroupedFoods]? // ... XCTAssertEqual(expectedGroupedFoods?.first?.foods.isEmpty, false) XCTAssertEqual(expectedGroupedFoods?.first?.foods.count, 4) } ✔
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) } ✘
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) } ✔
38. func test_finishReport_completeFlow() { var completed = false interactor.waitForCompletion().subscribe { _ in completed = true } .disposed(by: disposeBag) interactor.finish() XCTAssertTrue(completed) } ✘
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) } ✔
40. class ReportTripInteractorTests: XCTestCase class ReportTripInteractor_StartTripTests: ReportTripInteractorTests class ReportTripInteractor_FinishingTripTests: ReportTripInteractorTests class ReportTripInteractor_SearchingTripTests: ReportTripInteractorTests class ReportTripInteractor_WaintingTripTests: ReportTripInteractorTests ✔
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) } ✘
42. class Worker { func start(_ interactor: AnyInteractor) { someObservable .subscribe(someStream.dataSubject) .disposeOnStop(self) } } .subscribe(someStream.dataSubject)
43. class Worker { func start(_ interactor: AnyInteractor) { someObservable .disposeOnStop(self) } }
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) } ✔
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 } } !
46. final class ListFoodPresenterViewControllerTests: XCTestCase { private let bindable = ListFoodTableViewControllerBindMock() private let presenter = ListFoodPresenterViewController() override func setUp() { super.setUp() presenter.bindable = bindable } } ✔
47. final class ListFoodPresenterViewControllerTests: XCTestCase { private let bindable = ListFoodTableViewControllerBindMock() private lazy var presenter: ListFoodPresenterViewController = { let presenter = ListFoodPresenterViewController() presenter.bindable = bindable return presenter }() } ✔
48. Obrigado
49. Obrigado ronanrodrigo.com