injectState.swift

// Entry point of the app
func scene(
    _ scene: UIScene,
    willConnectTo session: UISceneSession,
    options connectionOptions: UIScene.ConnectionOptions
  ) {
  // Use this method to optionally configure and attach the UIWindow `window` to the provided UIWindowScene `scene`.
  // If using a storyboard, the `window` property will automatically be initialized and attached to the scene.
  // This delegate does not imply the connecting scene or session are new (see `application:configurationForConnectingSceneSession` instead).
  guard let scene = (scene as? UIWindowScene) else { return }
    
  self.dependencies = buildDependencies()
  let vc = buildViewController()
  let window = UIWindow(windowScene: scene)
  window.rootViewController = vc
  window.makeKeyAndVisible()
  self.window = window
}

func buildViewController() -> UIViewController {
    
  //chek for UI testing
  #if UITESTING
  return self.vcForUITesting()
  #endif
    
  return LegalViewController(dependencies: self.dependencies)
}

func vcForUITesting() -> UIViewController {
  // extract the state
  let user: Models.User? = self.extractState()
  // route the app to the proper vc
  let initialScreen = UserDefaults.standard.string(forKey: Arguments.initialScreen.rawValue)
  if initialScreen == "home_screen" {
    // inject the user
    return HomeViewController(user: user, dependencies: self.dependencies)
  }
  return LegalViewController(dependencies: Dependencies())
}