Authentication testing in Testing Fundamentals - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

What is the primary goal of authentication testing?

Choose the best description of what authentication testing aims to verify in a software system.

A To test if the system can handle multiple users simultaneously without crashing.

B To check if the system correctly identifies and verifies users before granting access.

C To verify that the system encrypts all user data during transmission.

D To ensure the system's user interface is easy to navigate.

💡 Hint

Think about what authentication means in everyday life, like showing an ID to prove who you are.

Authentication testing focuses on verifying that the system correctly identifies users before allowing access. It is about confirming identity, not about performance, encryption, or UI.

❓ Predict Output

intermediate

What is the output of this authentication check code?

Given the following Python code simulating a simple authentication check, what will be printed?

Testing Fundamentals

def authenticate(user, password):
    valid_users = {'alice': 'pass123', 'bob': 'qwerty'}
    if user in valid_users and valid_users[user] == password:
        return 'Access granted'
    else:
        return 'Access denied'

print(authenticate('bob', 'qwerty'))

A Access denied

B KeyError

C Access granted

D None

💡 Hint

Check if the username and password match the dictionary entries.

The username 'bob' exists in the dictionary with password 'qwerty', so the function returns 'Access granted'.

❓ assertion

advanced

Which assertion correctly tests failed login attempt?

You want to write a test to check that a login function returns False when given wrong credentials. Which assertion is correct?

Testing Fundamentals

def login(user, password):
    return user == 'admin' and password == 'secret'

# Choose the correct assertion to test login('admin', 'wrongpass')

A assert login('admin', 'wrongpass') == False

B assert login('admin', 'wrongpass') != False

C assert login('admin', 'wrongpass') is None

D assert login('admin', 'wrongpass') == True

💡 Hint

Think about what the function returns when credentials are incorrect.

The login function returns False for wrong credentials, so the assertion must check for False.

🔧 Debug

advanced

Identify the bug in this authentication test code

This test is supposed to check that a user cannot login with an empty password. What is the bug?

Testing Fundamentals

def test_empty_password():
    result = login('user1', '')
    assert result == True

A The assertion expects True but should expect False for empty password.

B The login function is missing a return statement.

C The test function name should start with 'test_' to run.

D The password parameter should be None, not empty string.

💡 Hint

Think about what should happen if the password is empty.

The test expects login to succeed with empty password, which is incorrect. It should expect failure (False).

❓ framework

expert

Which test framework feature best supports authentication testing with multiple user roles?

You want to test authentication for different user roles (admin, guest, user) with various credentials. Which feature of a test framework helps organize and run these tests efficiently?

A Snapshot testing to compare UI changes after login.

B Mocking external services to simulate network delays.

C Code coverage reports to measure tested code percentage.

D Parameterized tests that run the same test logic with different inputs.

💡 Hint

Think about running the same test with different usernames and passwords.

Parameterized tests allow running one test multiple times with different data, perfect for testing multiple user roles and credentials.