[Solved] You have a use case testing scenario for an online store checkout:1. User adds item to cart2. User proceeds to checkout3.... User clicks 'Pay'Which expected result best fits this use case test? | Testing Fundamentals

Testing Fundamentals - Functional Testing Techniques

You have a use case testing scenario for an online store checkout:

1. User adds item to cart
2. User proceeds to checkout
3. User enters invalid credit card number
4. User clicks 'Pay'

Which expected result best fits this use case test?

APayment is processed successfully.

BCart is emptied automatically.

CUser is redirected to homepage without message.

DError message 'Invalid credit card number' is displayed and payment is blocked.

Step-by-Step Solution

Solution:

Step 1: Review the scenario steps
User tries to pay with an invalid credit card number.
Step 2: Determine correct system response
The system should block payment and show an error about the invalid card.
Final Answer:
Error message 'Invalid credit card number' is displayed and payment is blocked. -> Option D
Quick Check:
Invalid payment info = error shown, payment blocked [OK]

Quick Trick: Invalid payment info must trigger error and block payment [OK]

Common Mistakes:

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