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Testing in Apollo Kotlin


Apollo Kotlin provides the following tools to help with testing your code:

MockServer creates a full HTTP server. It requires minimal changes to your production code (you only need to change serverUrl), which means you can use the same ApolloClient for tests and production. MockServer is also useful for testing specific server behaviors, such as error cases, HTTP headers, and timeouts.

TestNetworkTransport bypasses HTTP calls altogether and returns predefined GraphQL responses. It requires more modifications to your production code, but you can use it in lighter tests that don't need to create a server. You can use test builders to instantiate the data in the responses.

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Batching operations
Mocking HTTP responses