api-test-patterns

You can write API tests for REST and GraphQL endpoints using Playwright to cover scenarios like CRUD operations, querying, mutations, and authentication. This approach validates both happy paths and error handling.

Consumer-driven contract testing validates API integration points by verifying expectations between services. Pact generates and verifies these contracts, ensuring providers and consumers remain compatible without requiring full end-to-end integration tests.

Yes, Playwright can be used for API testing to send HTTP requests and validate responses for REST and GraphQL APIs. It handles input validation, authentication, and error handling directly against your endpoints.

The best way to test API authentication and input validation is by generating comprehensive test suites that explicitly cover happy paths, invalid inputs, and error handling. This ensures endpoints correctly reject invalid data and secure resources.

Error handling for GraphQL APIs is managed by testing query and mutation responses for expected failures and edge cases. This validates that the API correctly handles invalid inputs and returns appropriate error structures.

Contract testing with Pact complements rather than replaces integration testing by isolating consumer-provider interactions. It verifies that REST API contracts are met, ensuring integration points function correctly without testing the entire system.