eofster

struct TrackSummary {
    let trackID: Int
    let name: String
    let startTime: Double
    let distance: Float
}

eofster

protocol TrackRepository {}
class TrackRepositoryImpl {}
extension TrackRepositoryImpl: TrackRepository {}

eofster

class TrackNameUpdateInteractor {
    let repository: TrackRepository

    init(repository: TrackRepository) {
        self.repository = repository
    }
}

extension TrackNameUpdateInteractor: Interactor {
    func execute() {

eofster

protocol TrackSummaryInteractorOutput {
    func update(track: TrackSummary)
}

class TrackSummaryInteractor {
    let repository: TrackRepository
    let output: TrackSummaryInteractorOutput

    init(repository: TrackRepository, output: TrackSummaryInteractorOutput) {
        self.repository = repository

eofster

protocol Interactor {
    func execute()
}

eofster

let interactor = TrackSummaryInteractor(
    output: TrackSummaryPresenter(
        output: TrackSummaryViewController()
    )
)
interactor.execute()

eofster

import UIKit

class TrackSummaryViewController: UIViewController {
    @IBOutlet private(set) var nameLabel: UILabel!
    @IBOutlet private(set) var dateLabel: UILabel!
    @IBOutlet private(set) var distanceLabel: UILabel!
}

extension TrackSummaryViewController: TrackSummaryPresenterOutput {
    func setName(name: String) {

eofster

import Foundation
import XCTest

class TrackSummaryPresenterTests: XCTestCase {
    func testCallsOutputWithExpectedValues() {
        let outputSpy = TrackSummaryPresenterOutputSpy()
        let presenter = TrackSummaryPresenter(output: outputSpy)
        let track = TrackSummary(name: "Trip", startTime: 1449567617, distance: 200)

        presenter.update(track)

eofster

import Foundation

protocol TrackSummaryPresenterOutput {
    func setName(name: String)
    func setDate(date: String)
    func setDistance(distance: String)
}

class TrackSummaryPresenter {
    let output: TrackSummaryPresenterOutput

eofster

protocol TrackSummaryInteractorOutput {
    func update(track: TrackSummary)
}

class TrackSummaryInteractor {
    let output: TrackSummaryInteractorOutput

    init(output: TrackSummaryInteractorOutput) {
        self.output = output
    }