Negative test cases for Login Page.

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Negative Test Cases for Login Page

Some of the negative test cases for the Login page are as follows:

Test Case ID	Test Scenario	Test Data	Steps	Expected Result
TC_001	Login with both fields empty	Username: “” Password: “”	Leave Username blank Leave Password blank Click Login	Validation message displayed for required fields
TC_002	Login with empty Username	Username: “” Password: ValidPassword123	Leave Username blank Enter valid password Click Login	Error message for missing Username
TC_003	Login with empty Password	Username: validUser Password: “”	Enter valid username Leave Password blank Click Login	Error message for missing Password
TC_004	Login with invalid Username	Username: invalidUser Password: ValidPassword123	Enter invalid username Enter valid password Click Login	Error message: Invalid username or password
TC_005	Login with invalid Password	Username: validUser Password: WrongPassword	Enter valid username Enter incorrect password Click Login	Error message: Invalid username or password
TC_006	Password below minimum length	Username: validUser Password: 123	Enter valid username Enter short password Click Login	Validation message for password length requirement
TC_007	Username exceeds maximum length	Username: 256+ characters Password: ValidPassword123	Enter overly long username Enter valid password Click Login	Error message for exceeding maximum length
TC_008	Login with special characters in Username	Username: @@@###$$$ Password: ValidPassword123	Enter special characters in username Enter valid password Click Login	Validation error for invalid username format
TC_009	Login with SQL Injection attempt	Username: ‘ OR ‘1’=’1 Password: ‘ OR ‘1’=’1	Enter SQL injection input Click Login	Login should fail and input should be sanitized
TC_010	Login with XSS script	Username: <script>alert(1)</script> Password: password	Enter script in username field Click Login	Script should not execute; input should be sanitized
TC_011	Account locked user login	Username: lockedUser Password: ValidPassword123	Enter locked account credentials Click Login	Error message indicating account is locked
TC_012	Login with expired password	Username: validUser Password: ExpiredPassword	Enter credentials with expired password Click Login	Prompt to reset or change password
TC_013	Multiple failed login attempts	Username: validUser Password: WrongPassword	Enter wrong password multiple times Click Login each time	Account should be temporarily locked after threshold attempts
TC_014	Login with leading/trailing spaces	Username: ” validUser ” Password: ” ValidPassword123 “	Enter credentials with spaces Click Login	System trims spaces or shows appropriate validation error
TC_015	Login when server is down	Valid credentials	Enter valid username and password Click Login while server is unavailable	User-friendly error message displayed