Roy's test

1.roy.swift

class LogInViewModelTests: XCTestCase {
    
    private let disposeBag = DisposeBag()
    private let timeout = 1.0
    
    var mockCellViewModelFactory: LabelAndTextFieldCellViewModelFactoryProtocol!
    var mockLogInService: MockLogInService!
    var logInViewModel: LogInViewModel!
    
    override func setUp() {
        super.setUp()
        mockCellViewModelFactory = MockLabelAndTextFieldCellViewModelFactory()
        mockLogInService = MockLogInService()
        logInViewModel = LogInViewModel(cellViewModelFactory: mockCellViewModelFactory, logInService: mockLogInService)
    }
    
    func testCreateCellViewModels() {
        // TODO: add this tests before anything else
    }
    
    func testLogInWhenRequiredFieldsAreEmpty() {
        let expectation = expectationWithDescription("Should get DisplayErrorMessage UIEvent when required fields are empty")
        mockLogInService.logInError = LogInError.IncompleteInput
        logInViewModel.UIEvents.subscribeNext { event in
            switch event {
            case .DisplayErrorMessage(NSLocalizedString("ERROR_MESSAGE_NEED_TO_FILL_REQUIRED_FIELDS", comment: "Need to fill all required fields")):
                expectation.fulfill()
            default:
                XCTFail("should get .DisplayErrorMessage with correct associated message")
            }
        }.addDisposableTo(disposeBag)
        logInViewModel.logIn()
        waitForExpectationsWithTimeout(timeout, handler: nil)
    }

}