RxVIP2.swift

interactor.swift

protocol InteractorInputLogics {
    var request: PublishRelay<Void> { get }
}

protocol InteractorOutputLogics {
    var response: Observable<String> { get }
}

class Interactor: InteractorInputLogics & InteractorOutputLogics {
    
    public var request: PublishRelay<Void> = .init()
    
    public var response: Observable<String> {
        return request
            .flatMap({ [unowned self] _ -> Single<String> in
                return self.worker.getTitle()
            })
            .asObservable()
    }
    
    private let worker: TestWorker
    
    init(worker: TestWorker) {
        self.worker = worker
    }
}

InteractorTests.swift

/*
Interactor의 input과 output에 대한 RxTest진행
어떠한 Request 이벤트 발생시 기대하는 Response 이벤트를 받는지?
Worker는 Stub으로 생성하여 Interactor에 주입
*/
class InteractorTests: XCTestCase {
    
    var interactor: Interactor!
    var disposeBag: DisposeBag!
    
    override func setUp() {
        interactor =Interactor.init(worker: TestWorkerStub.init())
        disposeBag = DisposeBag()
    }
    
    func testInteractor() {
        let scheduler = TestScheduler.init(initialClock: 0)
        
        let output = scheduler.createObserver(String.self)
        
        // given
        scheduler.createColdObservable([.next(100, ()), .next(200, ())])
            .bind(to: interactor.request)
            .disposed(by: disposeBag)
        
        // when
        interactor.response.subscribe(output)
            .disposed(by: disposeBag)
        
        // then
        scheduler.start()
        XCTAssertEqual(output.events, [.next(100, "hello"), .next(200, "hello")])
    }
    
    class TestWorkerStub: TestWorker {
        
        override func getTitle() -> Single<String> {
            return Single.just("hello")
        }
    }
}

presenter.swift

protocol PresenterOutputLogics {
    
    var display: Driver<String> { get }
}

class Presenter: PresenterOutputLogics {
    
    public var display: Driver<String> {
        // interactor의 response에 대한 error처리는 presenter에서
        return interactor.response
            .asDriver(onErrorJustReturn: "ERROR!")
    }
    
    private var interactor: InteractorOutputLogics
    
    init(interactor: InteractorOutputLogics) {
        self.interactor = interactor
    }
}

PresenterTests.swift

/*
Presneter의 output에 대한 RxTest진행
InteractorOutputLogic에 대한 Stub을 생성해서 Presenter 주입

*/
class PresenterTests: XCTestCase {
    
    var stub: InteractorOutputLogicsStub!
    var presenter: Presenter!
    var disposeBag: DisposeBag!
    
    override func setUp() {
        self.stub = InteractorOutputLogicsStub.init()
        presenter = Presenter.init(interactor: stub)
        disposeBag = DisposeBag()
    }
    
    func testPresenter() {
        // Given
        self.stub.isSuccess = true
        
        // When
        let output = try! presenter.display.toBlocking(timeout: 2.0).toArray()
        
        // Then
        XCTAssertEqual(output, ["test"])
    }
    
    
    func testPresenter2() {
        // Given
        self.stub.isSuccess = false
        
        // When
        let output = try! presenter.display.toBlocking(timeout: 2.0).toArray()
        
        // Then
        XCTAssertEqual(output, ["error"])
    }
    
    class InteractorOutputLogicsStub: InteractorOutputLogics {
        
        var isSuccess: Bool = true
        
        var response: Observable<String> {
            return Observable.just(isSuccess ? "test": "error")
        }
    }
}

viewController.swift

class ViewController {
    
    var interactor: InteractorInputLogics!
    var presenter: PresenterOutputLogics!
    
    init() {
        self.configureVIPCycle()
    }
    
    func configureVIPCycle() {
        let interactor = Interactor.init(worker: .init())
        self.interactor = interactor
        self.presenter = Presenter.init(interactor: interactor)
    }
}

설계 Flow
Interactor -> Presenter -> ViewController or ViewController -> Interactor -> Presenter
반드시 Presenter보다 Interactor를 먼저 개발해야함.

기존 Interactor의 output을 Presenter내부에서 binding처리 하지 않고 바로 Presenter Output Logic으로 반환