ios LaunchArgs handle

LaunchArgsHandle.swift

enum LaunchArgs: String, CaseIterable {
    case fakeApiUrl = "--fake_api_url"
    case accessToken = "--access_token"
}
 
public protocol UITestsArgumentsHandler {
    func handleProcessArgument(_ processArgument: String?)
}
    
public class UITestsArgumentsAuthHandler: UITestsArgumentsHandler {
    public func handleProcessArgument(_ processArgument: String?) {
        guard let authToken = processArgument else {
            return
        }
        //code to setup auth token
    }
}
public class UITestsArgumentsTestApiUrlHandler: UITestsArgumentsHandler {
    public func handleProcessArgument(_ processArgument: String?) {
        guard let testApiUrl = processArgument else {
            return
        }
        //code to setup test api url
    }
}
 
public class UITestsArgumentsHandlerFactory {
 
    public static func argumentsHandler(for key: LaunchArgs) -> UITestsArgumentsHandler? {
        switch key {
        case .accessToken:
            return UITestsArgumentsAuthHandler()
        case .fakeApiUrl:
            return UITestsArgumentsTestApiUrlHandler()
        default:
            return nil
        }
    }
}
 
public class UITestService {
    public func activate() {
        let environment = ProcessInfo.processInfo.environment
        LaunchArgs.allCases.forEach { arg in
            UITestsArgumentsHandlerFactory.argumentsHandler(for: arg)?.handleProcessArgument(environment[arg.rawValue])
        }
 
         //do other staff for testing
    }
}
 
//and then you can run UITestService in didFinishLaunchingWithOptions only for debug app version
 
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
#if DEBUG
    UITestService.activate()
#endif
    
    //do other staff
}