Integration Testing GraphQL APIs

Welcome to integration testing for GraphQL APIs! While unit tests check small parts of your code, integration tests verify that different components work together correctly.

• End-to-End Flow: They simulate real client requests.
• Component Interaction: Ensure your GraphQL schema, resolvers, and data sources all connect properly.
• Confidence: Gives you assurance that your API behaves as expected before deployment.

This lesson focuses on using Spring Boot's testing utilities.

Spring Boot provides powerful tools to make integration testing straightforward:

• @SpringBootTest: This annotation loads your full application context, making all your beans available for testing.
• WebTestClient: A non-blocking client for testing web endpoints. It simulates HTTP requests to your GraphQL API.

Together, these allow you to send actual GraphQL queries/mutations and inspect the responses.