A single weak login can compromise an entire system. In 2025, attackers are exploiting reused passwords and outdated login flows to breach accounts at scale. Credential stuffing attacks have surged, with over 20,000 accounts compromised in a single wave targeting Australian superannuation funds. Globally, 82% of organizations now view credential stuffing as a significant threat. Hence, testing your login page is of utmost priority. Using different test case sample for login page allows you to mitigate the risks!

At the same time, users expect fast and seamless login flows. A slow or confusing login process increases abandonment rates. With rising expectations for easy-to-use design, accessibility, and responsive performance, UI/UX testing and password validation must become standard practice, not an afterthought.

Regulations like GDPR and CCPA require compliant login structures, secure authentication testing, and transparent handling of user data.

This guide outlines over 60 test case samples for login pages, covering login page security testing, compliance, and usability. BotGauge supports QA teams in automating these scenarios using AI-driven templates, including flows like multi-factor authentication, CAPTCHA validation, and session management.

Why Login Page Testing is Critical in 2025

Login pages are the most targeted and the most overlooked components in digital infrastructure. Testing them thoroughly isn’t optional anymore—it directly affects security, compliance, and user retention.

1. Surge in Credential Stuffing Attacks and AI-Driven Hacking

Credential stuffing attacks now account for over 30% of all login traffic on some websites. Attackers use AI to mimic real users and exploit untested flows. Strong authentication testing identifies these loopholes before they are exploited.

2. User Expectations for Seamless, Accessible, and Fast Logins

Users drop off if logins feel slow, inaccessible, or inconsistent. A functional login today must support multi-factor authentication, work across all browsers, and pass accessibility testing. Poor UX directly impacts conversions and brand trust.

3. Compliance with GDPR, CCPA, and Evolving Data Laws

Laws like GDPR and CCPA demand secure handling of user credentials, session management, and transparent consent. QA teams must verify login flows align with these rules or risk fines, lawsuits, and loss of customer trust.

Strong compliance, better security, and a smoother user experience all start with targeted QA. Let’s now look at key functional test case samples for login pages that cover both core and advanced scenarios.

Functional Test Case Sample for Login Pages

Functional test cases verify if your login system works under expected conditions. These are the foundation of login QA and must be tested across valid, invalid, and recovery scenarios.

🔐 Core Login Functionality

Example 1. Valid login with correct credentials

Given a registered email and correct password -> When login is submitted -> Then the user must be redirected to the dashboard

Example 2. Login with wrong password

Given a registered email and incorrect password -> When login is submitted -> Then show a generic error message

Example 3. Login with unregistered email

Given an unregistered email -> When login is submitted -> Then display “Account not found”

Example 4. Login with both fields empty

Given both email and password fields are blank -> When login is submitted -> Then block submission and show required field errors

Example 5. Login with only email entered

Given only email is entered -> When login is submitted -> Then prompt for password

Example 6. Login with only password entered

Given only password is entered -> When login is submitted -> Then prompt for email

🔑 Password Rules & Validation

Example 7. Login with password containing special characters

Given the password has special characters -> When login is submitted -> Then accept if credentials are correct

Example 8. Login with mixed-case password

Given a password with upper and lower case -> When submitted -> Then validate with case sensitivity

Example 9. Login with numeric-only password

Given a password with only numbers -> When submitted -> Then allow if policy allows

Example 10. Login with short password

Given a password less than 6 characters -> When submitted -> Then reject and show minimum length warning

Example 11. Login with long password

Given a password over 100 characters -> When submitted -> Then accept without truncating

Example 12. Login with Unicode characters

Given a password with Unicode or emojis -> When submitted -> Then accept and process if valid

Example 13. Password strength policy

Given a weak password like “123456” -> When login is attempted -> Then the system must reject it and prompt for a stronger one

🕵️‍♂️ Password Input Behavior

Example 14. Toggle password visibility

Given the password field is masked -> When the eye icon is clicked -> Then toggle to visible text

Example 15. Password is masked by default

Given the login page loads -> When the password field is displayed -> Then it must be masked

💾 Saved Credentials & Autofill

Example 16. Login using browser autofill

Given saved credentials -> When the login page loads -> Then autofill fields and allow login

Example 17. Login with autofill disabled

Given autofill is turned off -> When fields are manually filled -> Then allow successful login

👤 Account State Management

Example 18. Login with expired account

Given the user account is expired -> When login is attempted -> Then block access with appropriate message

Example 19. Login with deactivated account

Given a deactivated account -> When login is attempted -> Then deny access

Example 20. Login after password reset

Given a user resets their password -> When new credentials are entered -> Then login must succeed

Example 21. Login with expired reset link

Given a reset link older than expiry -> When clicked -> Then deny password change and show error

⏳ Session & Token Handling

Example 22. Session timeout

Given the user is inactive for X minutes -> When session expires -> Then auto logout the user

Example 23. Re-login after session timeout

Given the session has expired -> When user interacts -> Then redirect to login page

Example 24. Login after clearing cookies

Given all cookies are cleared -> When login is attempted -> Then create a new session

Example 25. Reuse old session ID

Given an invalid session ID -> When reused -> Then redirect to login page

Example 26. Login with expired token

Given a JWT token has expired -> When submitted -> Then reject and prompt login

Example 27. Login with tampered token

Given a token is modified -> When submitted -> Then block access with error

🧪 Browser & Device Testing

Example 28. Login on Android browser

Given user is on Android device -> When login is attempted -> Then UI must function correctly

Example 29. Login on iOS Safari

Given user is on iPhone Safari -> When login is attempted -> Then layout and functionality must work

Example 30. Login on desktop Chrome

Given Chrome is used -> When login form is submitted -> Then it must authenticate properly

Example 31. Login on Firefox or Edge

Given alternative browsers -> When login is submitted -> Then maintain consistent behavior

Example 32. Responsive login on foldables

Given user is on a foldable or tablet -> When login page loads -> Then layout must adjust cleanly

🌐 Network Conditions

Example 33. Retry after network drop

Given network disconnects -> When reconnected -> Then allow retry without data loss

Example 34. Attempt login offline

Given no internet connection -> When login is attempted -> Then show connection error

🔐 Multi-Factor Authentication (MFA)

Example 35. Valid OTP for MFA

Given valid one-time password -> When entered after credentials -> Then grant access

Example 36. Invalid OTP for MFA

Given incorrect OTP -> When submitted -> Then deny login with retry option

Example 37. Login using backup code

Given valid backup MFA code -> When submitted -> Then log in and expire the code

🔗 OAuth & Social Logins

Example 38. Login via Google

Given Google account is linked -> When user clicks ‘Login with Google’ -> Then authenticate using OAuth

Example 39. Login via Facebook

Given Facebook login is enabled -> When clicked -> Then authenticate and redirect

🌍 IP, Location & VPN

Example 40. Login from restricted IP

Given login from a blacklisted IP -> When attempted -> Then block and log the attempt

Example 41. Login from new region

Given login from a new location -> When attempted -> Then trigger alert or MFA

Example 42. Login via VPN

Given VPN is active -> When login is attempted -> Then allow or restrict as per policy

🧱 Security Checks

Example 43. SQL injection in email

Given input like ‘ OR 1=1 — -> When submitted -> Then sanitize and block the input

Example 44. XSS injection in input

Given script tag in field -> When form is submitted -> Then neutralize the script

✏️ Input Handling

Example 45. Email with leading spaces

Given leading/trailing spaces in email -> When submitted -> Then trim and validate

Example 46. Case sensitivity in email

Given capitalized email -> When submitted -> Then treat as case-insensitive

Example 47. Special characters in email

Given email includes ‘+’ or ‘.’ -> When submitted -> Then process as valid

🧩 API Authentication

Example 48. API login with valid credentials

Given a valid API call -> When submitted -> Then return token and 200 status

Example 49. API login with invalid credentials

Given wrong credentials via API -> When submitted -> Then return 401 error

Example 50. Rate-limited API login

Given too many failed API calls -> When limit is hit -> Then return 429 status

♿ Accessibility & Navigation

Example 51. Screen reader compatibility

Given a screen reader is used -> When navigating login page -> Then announce all fields

Example 52. Keyboard-only login

Given no mouse input -> When tabbing through form -> Then follow logical order

🈶 Language & Localization

Example 53. Login in Japanese

Given language is switched to Japanese -> When page loads -> Then all text must be localized

Example 54. Login in Arabic

Given Arabic is selected -> When page loads -> Then support RTL layout

📄 Legal & UX Compliance

Example 55. T&C and Privacy links

Given the login page -> When loaded -> Then display T&C and Privacy Policy links

Example 56. Policy links open in new tab

Given user clicks policy link -> When clicked -> Then open in a separate tab

Example 57. Cookie consent for GDPR

Given user is from EU -> When login page loads -> Then show cookie consent banner

👁 Biometric & Retry Logic

Example 58. FaceID biometric login

Given device supports FaceID -> When prompted -> Then authenticate biometrically

Example 59. Retry limit reached

Given 5 failed attempts -> When login is attempted again -> Then lock account temporarily

Example 60. Outdated app version

Given old app version -> When login is attempted -> Then prompt user to update

Common Pitfalls in Login Page Testing

Even a well-designed login flow can break under real-user access if critical test case samples for login pages are skipped. These issues don’t show up in unit tests but directly impact user credentials, conversions, and trust.

1. Overlooking biometric login edge cases (e.g., FaceID failure).

Biometric login is widely used on mobile devices. If fallback logic for FaceID or TouchID fails and isn’t covered in your sample test scenarios for the login page, users get locked out with no recovery option.

2. Ignoring third-party dependency failures (e.g., OAuth provider downtime).

Most teams skip testing for OAuth provider failures. When services like Google or Facebook go down, the login page freezes without fallback, disrupting access and exposing gaps in login page security testing.

3. Not testing for “paste” functionality in password fields.

Some developers block paste in the password field, breaking browser password managers. Without a test case sample for the login page that checks this, users may abandon login or reset unnecessarily.

These overlooked gaps lead to lost sessions and poor user experience. BotGauge helps QA teams fix this by automating login-specific test cases at scale—let’s see how. We create various test case sample for login page and find the gaps.

How We Helps You Create Better Test Case Sample for Login Page?

BotGauge is one of the few AI testing agents with unique features that set it apart from other tools used for generating a test case sample for login page. It combines flexibility, automation, and real-time adaptability for teams aiming to simplify QA.

Our autonomous agent has built over a million test cases for clients across industries—many focused on authentication testing, password validation, and validating user credentials. The founders of BotGauge bring 10+ years of experience in the software testing industry and have used that expertise to create one of the most advanced AI testing agents available today.

Special features:

• Natural Language Test Creation – Write plain-English inputs; BotGauge converts them into automated test scripts for sample test scenarios for login page, including CAPTCHA validation and password recovery.
• Self-Healing Capabilities – Automatically updates test cases when your app’s UI or logic changes, ideal for UI/UX testing and error message testing.
• Full-Stack Test Coverage – From UI to APIs and databases, BotGauge supports API login testing, OAuth integration, and handles critical login flows such as multi-factor authentication (MFA) and session management.

These features not only assist in login page security testing and brute-force attack prevention, but also enable secure, scalable, and cost-efficient automation for compliance-driven platforms.

Explore more of BotGauge’s AI-driven testing features → BotGauge

Conclusion

A secure, user-friendly login page isn’t built on assumptions. It’s built on test coverage. From authentication testing and session management to login page security testing, each step needs structured validation. 

These 60+ test case samples for login pages cover functional flows, edge cases, and compliance to help you prevent failures before they reach users.

Using tools like BotGauge, QA teams can automate even the most complex sample test scenarios for login page logic, reduce manual effort, and catch what traditional scripts miss.

Thorough testing is no longer optional. It is your first line of defense and your user’s first experience.

People Also Asked

1. How should I test login functionality with both valid and invalid credentials?

Use a reliable software testing tool to create both positive and negative login flows. Test valid user credentials, blank fields, and invalid formats. Use test automation platforms that support error handling, API testing software, and DevOps integration to ensure login logic behaves correctly under different conditions.

2. What are the best practices for writing clear and effective login test cases?

Use structured inputs and expected results within a test case management tool. Cover scenarios like session timeout, MFA, and password resets. BotGauge, an AI-powered software testing software, auto-generates login test cases using codeless testing tools, helping QA teams save time and ensure test clarity.

3. How do I test for security vulnerabilities like SQL injection on the login page?

Use automated testing tools to simulate SQL injection attempts like ‘ OR 1=1– and monitor input sanitization. Advanced QA testing solutions like BotGauge include built-in AI-driven test automation flows for validating login field security across web and mobile apps.

4. Should login and sign-up be combined into a single interface or kept separate?

From a performance testing software and usability standpoint, separating login and sign-up helps reduce user confusion and isolate test paths. This structure simplifies testing in cross-browser testing and mobile testing tools, ensuring better UX and compliance under real conditions.

5. How can I test the login process across different devices and browsers?

Use cloud-based testing and cross-browser testing features from your software testing tool to check login functionality on Chrome, Safari, Android, and iOS. Include touch interactions, resolution changes, and fallback logic. Tools like BotGauge offer real-device labs for instant testing.

6. What are common pitfalls to avoid when testing login pages?

Avoid skipping tests for biometric login, OAuth downtime, and blocked paste actions. Missed cases lead to poor UX. Use automated testing tools that support test reporting analytics and mobile login flows to close these coverage gaps across web and mobile systems.

7. How do I handle testing for third-party authentication services like OAuth?

Use test automation platforms to simulate third-party logins via Google, Facebook, or Apple. Include fallback handling and timeout validations. With BotGauge, you can test these flows in your CI/CD pipeline tools, ensuring OAuth integrations don’t break your main login page.

8. What considerations are there for testing login functionality in mobile applications?

Focus on mobile testing tools that support biometric auth, app permissions, low network modes, and screen rotation. Use open-source testing tools or cloud-based platforms to run login flows across Android and iOS. Combine tests with DevOps integration and test reporting analytics for traceability.