login method and login function code example

Example: login functionality

=Verify if a user will be able to login
with a valid username and valid password.	Positive
=Verify if a user cannot login with a 
valid username and an invalid password.	Negative
=Verify the login page for both, when 
the field is blank and Submit button is clicked.	Negative
=Verify the ‘Forgot Password’ functionality.	Positive
=Verify the messages for invalid login.	Positive
=Verify the ‘Remember Me’ functionality.	Positive
=Verify if the data in password field is
either visible as asterisk or bullet signs.	Positive
=Verify if a user is able to login with a
new password only after he/she has changed the password.	Positive
=Verify if the login page allows to
log in simultaneously with different
credentials in a different browser.	Positive
=Verify if the ‘Enter’ key of the keyboard
is working correctly on the login page.	Positive
Other Test Cases
=Verify the time taken to log in with a valid username and password.
                 Performance & Positive Testing
=Verify if the font, text color, and color coding
of the Login page is as per the standard.	
UI Testing & Positive Testing
=Verify if there is a ‘Cancel’ button
available to erase the entered text.	
Usability Testing
=Verify the login page and all its controls
in different browsers	
Browser Compatibility & Positive Testing.