catalinaturlea

// You implememt a Mock which conforms to the same protocol the ViewController is connected to 
class UserServiceMock: UserServiceInterface {
    
    var resultToReturn: Bool = false
    var errorToReturn: Error?
    
    func login(email: String, password: String, completion: (Bool, Error?)) {
        completion(resultToReturn, errorToReturn)
    }
}

catalinaturlea

class ViewController: UIViewController {
    
    var userService: UserServiceInterface = UserService.shared
  
    func login(email: String, password: String, completion: ((Bool) -> Void)) {
        // ....
        userService.login(email, password, completion: { (success, error) in
            if success {
                completion(true)

catalinaturlea

class LoginTests: XCTestCase {
    
    let viewControllerToTest = ViewController()

    func testLogin() {
        
        // Since this is an async call we need to wait for the callback in the test - otherwise we will not run long enought to get the response
        let loginExpectation = expectation(description: "should call login")
        viewController.login("testEmail", "testPassword", completion: { success in
            loginExpectation.fulfill()

catalinaturlea

class UserService {
    
    static var loginURL = "https://my.app.com/login"
    
    static var shared = UserService()
    
    func login(email: String, password: String, completion: (Bool, Error?)) {
        let params = ["email": email, "password": password]
        Alamofire.shared.request(loginURL, method: .POST, parameters: params, encoding: .URLEncoding).responseJSON { (response) in
        switch respose.status {

catalinaturlea

class ViewController: UIViewController {
    
    // ....
    
    @IBAction func loginButtonPressed() {
        login(emailTextField.text ?? "", passwordTextField.text ?? "", completion: { success in
            if !success {
                showLoginError()
                return
            }

catalinaturlea

private weak var webView: WKWebView!

override func viewDidLoad() {
    super.viewDidLoad()

    // This is needed when using an iOS target < iOS 11.0 - there was a storyboard bug which does not allow instantiating WKWebView from the Storyboard or Xib file
    let webView = WKWebView()
    self.webView.translatesAutoresizingMaskIntoConstraints = false

    self.view.addSubview(webView)

catalinaturlea

import sys
from youtrack.connection import Connection as YouTrack

#// authentication request with permanent token
#yt = YouTrack('https://instance_name.myjetbrains.com/youtrack/', token='perm:abcdefghijklmn')

#// versus authentication with username and password
yt = YouTrack('https://everskill.myjetbrains.com/youtrack/', login='add_yours_here', password='add_yours_here')

def print_issues(project, issues, type):

catalinaturlea

import sys
from youtrack.connection import Connection as YouTrack

#// authentication request with permanent token
#yt = YouTrack('https://instance_name.myjetbrains.com/youtrack/', token='perm:abcdefghijklmn')

#// versus authentication with username and password
yt = YouTrack('https://everskill.myjetbrains.com/youtrack/', login='username', password='password')

def print_issues(project, issues, type):

catalinaturlea

class MyTest: NSObject {
	private var identifier = "myIdentifier"

	var defaultContent: [String]

	init(withItem item: String) {
		defaultContent = [item]
	}

	class func fetchInfo(success: (info: [AnyObject: AnyObject]?) -> (), failure: ((error: NSError?) -> ())? ) {

catalinaturlea

class MyTest: NSObject {
	private var identifier: String = "myIdentifier"

	var defaultContent: [String]

	init(withItem item: String) {
		self.defaultContent = [item]
	}

	class func fetchInfo(success: (info: [AnyObject: AnyObject]) -> (), failure: ((error: NSError?) -> ())? ) {