Question 1

How to set up relay-local-schema for integration testing?

Accepted Answer

Import Network from relay-local-schema and configure it with your local schema in Relay's Environment. Use rootValue and contextValue to mock data, as shown in the README, to simulate different scenarios without a server.

Question 2

Can relay-local-schema be used in production apps?

Accepted Answer

No, the library's caveat clearly states it's not intended for production as a substitute for a remote GraphQL backend. It's best suited for development, testing, demos, and local data scenarios.

Question 3

relay-local-schema vs using a mock GraphQL server like GraphQL Yoga?

Accepted Answer

relay-local-schema is lighter and integrates directly with Relay, avoiding server setup, but lacks server features like subscriptions. Mock servers offer more realism with full GraphQL capabilities but require additional configuration and resources.

Question 4

How to handle mutations with relay-local-schema?

Accepted Answer

Mutations are executed locally against the schema; you need to define mutation resolvers in your local schema and use rootValue to handle the logic, similar to queries, ensuring the schema mimics server behavior.

Question 5

Does relay-local-schema support Relay's optimistic updates?

Accepted Answer

Since it uses Relay's standard Network layer, optimistic updates should work if configured, but the local execution might not accurately simulate network delays or failures, which could affect testing realism.

Question 6

How to integrate relay-local-schema with TypeScript?

Accepted Answer

Install the package and use it with TypeScript as usual; ensure your local schema and resolvers are properly typed to leverage TypeScript's type safety and avoid runtime errors in queries.

relay-local-schema

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