hard20 pts · first answer countsapi-testingcontract-testing

Consumer fails on a new field

The provider adds an optional field "loyaltyTier" to responses. A consumer's strict deserialiser throws on unknown properties and breaks. What is the lesson?

A.Providers must never add fields to any responseB.Optional fields should be sent as null firstC.Consumers should ignore unknown fields (tolerant reader)D.The consumer should switch to XML instead

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Consumer fails on a new field

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