GUI test case
Check for the of the fields as per the Fileds table 
(mention the fields and every thing within a FIELDS TABLE)
Check for the allignments of the Page
Check for the Spellingmistakes.
Check for the Colour of the PAGE
Positive testcase:
Click on SIGIN button.
Enter the Valid Username and password and click on the 
LOGIN button as per the LOGIN TABLE(mention the VALID ID's 
And passwords in a table)
Click on SIGN UP button.
Click on "Forget your ID or password" so that it helps you 
to provide the password settings screen
Negetive testcase:
Enter the INValid Username and password and click on the 
LOGIN button as per the LOGIN TABLE(mention the VALID ID's 
And passwords in a table)
Click on SIGNIN button without enetring USRNAME AND 
PASSWORDS.