Can any one recommend a tutorial or documents which helps me in starting contract testing between app and API gateway

This one seems pretty good. https://joostoostdijk.com/posts/creating-a-pact-with-swift It uses the pact-consumer-swift framework. But the workflow applies for PactSwift as well. Here’s another one that seems to cover quite a bit. https://medium.com/@rajatvig/ios-docker-and-consumer-driven-contract-testing-with-pact-d99b6bf4b09e But there’s no “official” one for Pact for Swift. I have it on my to-do list but I’m currently professionally focusing on things way too far away from Pact, unfortunately.

@Marko (IttyBittyApps / pact-swift) in this example, API is the the provider but the API gateway just distributes the requests to the microservices, it is more on configuration tooling not unit testing.

Have a read here https://docs.pact.io/getting_started/what_is_pact_good_for#why-pact-may-not-be-the-best-tool-for-testing-pass-through-apis-like-bffs

thank you