![]() We talked about the trade-off using sign in or without it in Part 1 of this series. In order to use schema to help writing and validating your queries, you need to sin in to take advantage of this feature. Here are some basics of a GraphQL query setup. ![]() Queries in GraphQL are posted to a fixed server URL with different query strings in the HTTP body. Good learning materials can be found at: GraphQL queries One can find out more details about the query language in the latest GraphQL spec. GraphQL APIs uses GraphQL query language to interact with the server. To make a GraphQL request using the POST HTTP method, we pass the following properties into the JSON body of the request. With GraphQL, one call is required to return all related info. Postman’s built-in support for GraphQL allows you to import a GraphQL schema and convert it into a Postman Collection with the Postman API Builder, which uses the graphql-to-postman module. For example, to get details of what is shipped in a package by a supplier, one may need to use Shipment, Supplier, and Product REST APIs to get all related data. GraphQL can also return more resources in one request, which may require many REST API calls to get the same. Unlike REST APIs, which use different endpoint URL for different services, and server defined structure of requests and responses, GraphQL API let the client to specifiy what exactly the client wants. This article is dedicated to GraphQL API testing. Most of examples are REST APIs, although many of the features, such as authentication and environment, are also applicable to GraphQL API testing. ![]() So far in this series, we have shown how to do API tests with Postman, how to setup API authentications, and how Postman environment can be used to simplify API testing. How to Test APIs Using Postman - Part 4: GraphQL ![]()
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