DashboardCoordinating.swift

protocol Pushing {
    func push(_ target: UIViewController, from parent: UIViewController)
}

struct Pusher: Pushing {
    func push(_ target: UIViewController, from parent: UIViewController) {
        parent.navigationController?.pushViewController(target, animated: true)
    }
}

protocol DashboardCoordinating {
    func pushDashboardScreen(from parent: UIViewController)
}

final class DashboardCoordinator: DashboardCoordinating {
    var pusher: Pushing = Pusher()
    var dashboardScreenFactory: () -> UIViewController = DashboardScreen.init
	
    func pushDashboardScreen(from parent: UIViewController) {
        let screen = dashboardScreenFactory()
        pusher.push(screen, from: parent)
    }
}