Consumer-Driven Contracts are a pattern for evolving services. In Consumer-Driven Contracts, each consumer captures their expectations of the provider in a separate contract. All of these contracts are shared with the provider so they gain insight into the obligations they must fulfill for each individual client. The provider can create a test suite to validate these obligations. This lets them stay agile and make changes that do not affect any consumer, and pinpoint consumers that will be affected by a required change for deeper planning and discussion.
Pacto helps guarantee these obligations are met, and decouple the obligations from the implementation so the consumers and providers can be tested independently.
Providers can also decouple from consumers for their testing. Pacto can use the contracts to simulate consumers for provider testing:
Read more at Consumer-Driven Contracts: A Service Evolution Pattern.