SOAP and REST were the only API protocols in the last decade that reigned the roost and had widespread implementations across different verticals. Some of the new age protocols like GraphQL from Facebook and GRPC from Google are now widely getting popular among developers due to its flexibility and ease of use. New age technology giants like Twitter, GitHub, Paypal, IBM, AWS, and Shopify have adopted GraphQL which prompted us to talk about GraphQL.
What is GraphQL?
GraphQL is an open-source query language for APIs - a new API standard by Facebook. It executes at run-time and fulfills queries with existing data. GraphQL provides a complete data description in API and enables declarative data fetching. This means a client can ask for and retain the data that is required. GraphQL exposes a single endpoint instead of multiple ones, as compared to REST API.
GraphQL is an open-source data query and manipulation language for APIs.
It is gaining popularity because of the following characteristics:
GraphQL vs REST API Interest Over Time
GraphQL vs REST API GitHub Stars With JS
Difference Between GraphQL and REST API
REST APIs are inflexible, making it difficult to keep up with rapidly changing data requirements.
GraphQL solves many challenges and creates greater efficiencies for Dev teams.
Teams work in parallel to speed up product development
Teams have to wait for the back-end team to complete API development to start using them
No multiple round trips to fetch data
Multiple round trips to fetch data
No over fetching and under fetching of data
Data is over-fetched in the response
Example: An app needs to display the Name and Title of user posts. The screen should also display the Name of the last three followers.
REST API Request With Multiple Endpoints
There is additional data in the REST API response, which is not required.
GraphQL Request With Single Endpoint
Fetch the required data using a GraphQL query with a single endpoint.
Here, the GraphQL query provides only the required data in response, resolving the challenges of over-fetching and under-fetching.
Popular GraphQL Testing Tools
Tips & Tricks
GraphQL testing ensures that the schema, queries, and mutations work as
per expectations on the front-end.
- EasyGraphQL provides libraries like Mocha that enable testing of API responses using assertions in an automated test suite.
- QA engineers can test the API response using the inbuilt 'Playground' tool that provides the number of columns in a table as well as related tables.
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