Introduction to Testing GraphQL Presentation
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The document provides an introduction to GraphQL and its testing, emphasizing its advantages over REST APIs, such as flexibility and efficiency in data querying. It outlines best practices for GraphQL testing, including functional validation, performance assurance, and security checks. Additionally, it includes etiquette guidelines for participants in training sessions, underscoring the importance of punctuality and constructive feedback.
![Mutation
Type Query
type Query{
user(id: ID): User
department(id: ID): Dept
users: [User]
dept: [Depatment]
}
type Mutation {
AddUser(name: String)
AddDepart(name: String)
}
type User{
id:String!
name:String!
age:Int
Address:String
}
Components of GraphQL
Resolvers
User: {
type: UserType,
args: {id: {type: GraphQLID}},
resolve(parent, args){
return Movie.findById(args.id);
}
}](https://image.slidesharecdn.com/testinggraphql-240130114056-6551f370/85/Introduction-to-Testing-GraphQL-Presentation-11-320.jpg)
![Query in GraphQL
• In simple terms, queries are ways to get data from the server. No more over or under
fetching, you get what exactly you ask. It is a read-only fetch operation.
• In the REST world, queries are equivalent to how you’d use Request with a payload to
get a response from the server.
Example:-
• the schema allows the users to query for four different types of data:
• A Book with a valid ID.
• An Author with a valid ID.
• To fetch all the Books, that returns a data type LIST.
• To fetch all the Authors, that returns a data type LIST.
type Query {
book(id: int): Books
author(id: int): Authors
books:[Books]
author: [Authors]
}](https://image.slidesharecdn.com/testinggraphql-240130114056-6551f370/85/Introduction-to-Testing-GraphQL-Presentation-12-320.jpg)
Introduction to Testing GraphQL Presentation
- 1. Introduction to GraphQL Testing Shivam Singh (Software Consultant) Test Automation Competency
- 2. Lack of etiquette and manners is a huge turn off. KnolX Etiquettes Punctuality Join the session 5 minutes prior to the session start time. We start on time and conclude on time! Feedback Make sure to submit a constructive feedback for all sessions as it is very helpful for the presenter. Silent Mode Keep your mobile devices in silent mode, feel free to move out of session in case you need to attend an urgent call. Avoid Disturbance Avoid unwanted chit chat during the session.
- 3. 1. Introduction • Example • Working Architecture 2. What is GraphQL? 3. Why use GraphQL? 4. Rest Vs GraphQL 5. Components of GraphQL 6. Why GraphQL API is the perfect data layer for your backend 7. Why test GraphQL? 8. Advantages of GraphQL 9. Best Practices for GraphQL Testing 10. Effective testing approach in GraphQL 11. Testing GraphQL Tools 12. Demo/QnA
- 4. Introduction
- 5. Introduction In the world of web development, there’s this powerful tool called GraphQL. It's like being your own chef in a restaurant kitchen, where you can order precisely what you want and how you want it. Let's take a peek at this cool way of getting data from the web, where you're in charge of your data order, getting only what you need, just how you want it, and all from one place!
- 6. Let's Understand with an example:- User Id Name age gender Address Id Street City Country Job Id Organization Department Join_Date Salary Id Type Pay Tax HomeScreen Name Department City SalaryPay
- 7. User Id Name age gender Address Id Street City Country Job Id Organization Department Join_Date Salary Id Type Pay Tax HomeScreen Name Department City SalaryPay Database Legacy System GRAPHQL Query to single GraphQL End point asking exactly detail you need
- 8. What is GraphQL ? • GraphQL is a query language and server-side runtime for fulfilling those queries on your existing data. • GraphQL isn't tied to any specific database or storage engine and is instead backed by your existing code and data. • GraphQL was developed by Facebook in 2012 . After that, it was publicly released in 2015 at the React.js conference. • It was developed to optimize RESTful API calls and provides a flexible, robust, and more efficient alternative to REST.
- 9. Why use GraphQL ? • We already had an API named REST for data communication, which follows a clear and well-structured resource- oriented approach. • It also provides some great ideas such as stateless servers, structured access to resources, etc. • REST is not so flexible to cope up with the rapidly changing requirements of the clients that access them. • In this case, when the data gets more complex, the routes get longer. Sometimes, it is challenging to fetch the data with a single request. That's why we use GraphQL.
- 10. Rest vs GraphQL
- 11. Mutation Type Query type Query{ user(id: ID): User department(id: ID): Dept users: [User] dept: [Depatment] } type Mutation { AddUser(name: String) AddDepart(name: String) } type User{ id:String! name:String! age:Int Address:String } Components of GraphQL Resolvers User: { type: UserType, args: {id: {type: GraphQLID}}, resolve(parent, args){ return Movie.findById(args.id); } }
- 12. Query in GraphQL • In simple terms, queries are ways to get data from the server. No more over or under fetching, you get what exactly you ask. It is a read-only fetch operation. • In the REST world, queries are equivalent to how you’d use Request with a payload to get a response from the server. Example:- • the schema allows the users to query for four different types of data: • A Book with a valid ID. • An Author with a valid ID. • To fetch all the Books, that returns a data type LIST. • To fetch all the Authors, that returns a data type LIST. type Query { book(id: int): Books author(id: int): Authors books:[Books] author: [Authors] }
- 13. Mutation in GraphQL • The mutations are equivalent to how you’d use the CRUD operation along with Verbs such as GET, POST, PUT, PATCH and DELETE in the REST world. • In GraphQL, It will always be a POST call. It's a write followed by fetch operation. Example:- See the two mutations that are shown for Adding a Book that should return a new Book for us and Add Author that should return a new Author: type Mutation { addBook(name: String!, authorId: int): Books addAuthor(name: String!): Author }
- 14. Why GraphQL API Is The Perfect Data Layer For Your Backend • One unified endpoint for your backend • Improved application performance • Improved system reliability • Better developer experience
- 15. Why Test GraphQL? • Schema Changes: Ensure modifications to the API schema don't break existing functionality. • Functional Validation: Confirm that queries, mutations, and subscriptions return expected results and perform desired operations. • Performance Assurance: Assess API performance under complex queries and data loads. • Security Checks: Identify and fix vulnerabilities like injection attacks, unauthorized access, and data exposure. • Error Handling: Verify graceful error handling, ensuring informative responses for clients. Why
- 16. Advantages of GraphQL • GraphQL is faster. • No over-fetching and under-fetching problems • Hierarchical Structure • Defines a data shape • Strongly typed
- 17. 02 01 Best practices To Test GraphQL 03 • Empty arrays • Maximum/minimum values • Invalid query handling • Authentication failures • Authorization denials Edge Cases and Error 04 • Missing required fields • Incorrect argument types • Violating custom validations • Field-level validations • Input object validations Query and Mutation • Concurrent request handling • Response time evaluation • Batched query performance • Caching effectiveness Performance and Load • Authenticated and unauthenticated requests • Valid and invalid tokens • Different user roles and permissions • Accessing restricted resources Test Authentication
- 19. Effective testing approach in GraphQL
- 21. Test GraphQL on Postman
- 22. DEMO
- 23. Q&A