medium10 pts · first answer countstestingmocking

Testing code that calls a payment API

How should you unit test a service that charges cards through an external payment provider's HTTP API?

A.Call the provider's real sandbox API in every unit test, so the tests always match the provider's current behaviourB.Inject the HTTP client and swap in a fake or mock server that also simulates timeouts and errorsC.Skip tests for this code and test it by hand in stagingD.Test only the happy path, since errors come from the provider

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Testing code that calls a payment API

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