title: How to write test case for Login screen ios swift?
body: <p>I want to create test cases for Login screen my screen contains three text field for username, password and url and one "LOGIN "button which calls login API, after login success Home screen opens. I want to create test cases for text fields and login button event. Need example to start test cases.
  I am new in swift, your help will be appreciated. 
  Thanks,</p>