Authentication testing in Testing Fundamentals - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is authentication testing?

Authentication testing checks if a system correctly verifies user identities before granting access.

beginner

Name two common methods used in authentication testing.

Common methods include testing with valid credentials and testing with invalid credentials to check system response.

beginner

Why is it important to test authentication with invalid credentials?

To ensure the system denies access and protects against unauthorized users, preventing security breaches.

intermediate

What role does multi-factor authentication (MFA) play in authentication testing?

MFA adds extra security layers; testing ensures each factor works correctly and the system enforces all required steps.

intermediate

How can you test session management as part of authentication testing?

By verifying that sessions expire after logout or timeout and that session tokens cannot be reused or hijacked.

What should authentication testing primarily verify?

A User identity verification before access

B Page layout and colors

C Database backup frequency

D Network speed

Authentication testing ensures only valid users can access the system.

Which test case is important for negative authentication testing?

A Login with invalid password

B Login with valid username and password

C Check page title

D Verify image loading

Testing invalid passwords checks if the system blocks unauthorized access.

Multi-factor authentication requires:

A Only a password

B Two or more verification methods

C No verification

D Only username

MFA uses multiple methods like password plus a code to increase security.

What should happen to a user session after logout?

A Session is transferred to another user

B Session remains active

C Session data is saved forever

D Session expires and user must log in again

Sessions should end on logout to prevent unauthorized reuse.

Which is NOT a focus of authentication testing?

A Password strength validation

B User identity verification

C Page responsiveness

D Access control enforcement

Page responsiveness relates to UI testing, not authentication.

Explain the key steps involved in authentication testing.

Think about how you check if only the right users get access.

Describe why session expiration is important in authentication testing.

Consider what happens if a session stays active after logout.

Practice

1. What is the main goal of authentication testing in software testing?

easy

A. To verify that only valid users can access the system

B. To check the speed of the application

C. To test the user interface design

D. To validate database connections

Solution

1. Step 1: Understand authentication testing purpose

   Authentication testing focuses on verifying user identity before granting access.

2. Step 2: Compare options with this purpose

   Only To verify that only valid users can access the system matches this goal; others relate to different testing areas.

3. Final Answer:

   To verify that only valid users can access the system -> Option A

4. Quick Check:

   Authentication testing = verify valid users [OK]

Hint: Authentication = check valid user access [OK]

Common Mistakes:

• Confusing authentication with performance testing
• Thinking authentication tests UI elements
• Mixing authentication with database testing

2. Which of the following is the correct way to test a login form's authentication feature?

easy

A. Enter valid username and password, then check for successful login

B. Click random buttons without entering data

C. Only check if the login button is visible

D. Test the color of the login page background

Solution

1. Step 1: Identify valid test steps for authentication

   Testing authentication requires entering valid credentials and verifying access.

2. Step 2: Evaluate options for correctness

   Enter valid username and password, then check for successful login correctly describes this; others do not test authentication properly.

3. Final Answer:

   Enter valid username and password, then check for successful login -> Option A

4. Quick Check:

   Valid credentials test = successful login [OK]

Hint: Test with valid credentials for login success [OK]

Common Mistakes:

• Ignoring input fields and clicking randomly
• Testing only UI elements without input
• Confusing visual checks with authentication tests

3. Consider this test case for authentication:

Input: username='user1', password='wrongpass'
Expected: Login fails with error message 'Invalid credentials'

What will be the test result if the system allows login with these credentials?

medium

A. Test passes if error message is shown

B. Test passes because login is successful

C. Test is inconclusive without more data

D. Test fails because login should not succeed

Solution

1. Step 1: Analyze expected vs actual behavior

   The test expects login failure with an error message for wrong password.

2. Step 2: Compare actual system behavior

   If login succeeds with wrong password, it contradicts expected behavior, causing test failure.

3. Final Answer:

   Test fails because login should not succeed -> Option D

4. Quick Check:

   Wrong password login = test fail [OK]

Hint: Wrong password must fail login [OK]

Common Mistakes:

• Assuming any login success means pass
• Ignoring expected error messages
• Confusing test pass/fail logic

4. You wrote this test script for authentication:

def test_login():
    username = 'admin'
    password = 'admin123'
    result = login(username, password)
    assert result == False

What is the error in this test?

medium

A. The password variable is empty

B. The username variable is not defined

C. The assertion expects login to fail but credentials are valid

D. The login function is missing parentheses

Solution

1. Step 1: Understand test intent and data

   Username and password appear valid, so login should succeed (True).

2. Step 2: Check assertion correctness

   Assertion expects False (failure), which contradicts valid credentials, causing test error.

3. Final Answer:

   The assertion expects login to fail but credentials are valid -> Option C

4. Quick Check:

   Valid credentials expect True, not False [OK]

Hint: Match assertion with expected login result [OK]

Common Mistakes:

• Asserting wrong expected result
• Assuming variables undefined without checking
• Confusing function call syntax

5. You want to test a system that locks a user account after 3 failed login attempts. Which test case best verifies this feature?

hard

A. Login once with correct password and check access

B. Attempt login 3 times with wrong password, then check if account is locked

C. Try logging in with empty username and password

D. Check if password reset link is visible on login page

Solution

1. Step 1: Identify feature to test

   The feature locks account after 3 failed login attempts.

2. Step 2: Select test case matching feature

   Attempt login 3 times with wrong password, then check if account is locked tests exactly this by failing login 3 times and checking lock status.

3. Final Answer:

   Attempt login 3 times with wrong password, then check if account is locked -> Option B

4. Quick Check:

   3 failed attempts = account lock test [OK]

Hint: Test lock by 3 failed logins [OK]

Common Mistakes:

• Testing unrelated features like password reset
• Using correct password instead of failed attempts
• Ignoring the number of failed attempts