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Manuals / API Testing / Chapter 10

E · Advanced · advanced · Week 8 · Chapter 10 of 11

GraphQL testing basics

Many teams use GraphQL. Testing differs from REST — queries, mutations, errors array, and no over-fetching assertions.

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First GraphQL query

POST to /graphql with { "query": "{ users { id name } }" }. Single endpoint, typed schema.

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Do this now

Use Postman GraphQL mode or curl against a public GraphQL API (e.g. SpaceX demo).

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Chapter learning outcomes
  • Query vs mutation
  • GraphQL errors format
  • Postman GraphQL
  • When REST vs GraphQL tests differ

Clear these before you leave

Side quest

Mutation test

If API supports mutation, create and verify resource.