Testing · interview question
Why would you mock PaymentGateway when unit testing OrderService?
Multiple choiceMediumchapter-10-curatedpremiumtestingmocking-with-mockito
Answer and explanation
Correct answer
A. To isolate order logic and avoid real network side effects
Why
Mocking the payment boundary keeps the test focused on how OrderService reacts to success or failure. It avoids accidental external calls and keeps the unit test fast and deterministic.
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