The document discusses automated testing of REST APIs. It describes four key ingredients for automating REST API testing: 1) Using REST Assured wrappers to break API calls into reusable request/response parts. 2) Parsing Swagger documentation to obtain API details. 3) Automatically generating Java code from Swagger/JSONSchema. 4) Using JavaFX for building graphical user interfaces to test APIs. Code examples and links are provided for each ingredient to illustrate the automated testing approach.

1. Automated Automation
of REST APIs
Harshit Kohli
Amit Chauhan

2. APIs vs WebServices
F.R.I.E.N.D.S JOEY

3. APIs vs WebServices
• Web Services are a subset of the generic term API(Application Programming Interface)
• All Web Services are APIs but all APIs are not WebServices
• A Web Service is simply an API wrapped in HTTP
• APIs – Selenium, Rest Assured
• Web Services – Google Maps REST API, GitHub REST API

4. REST

5. Why REST APIs ?
Easy to build Easy to use Fast

6. Swagger
• Interface to REST APIs allowing discovery of the capabilities offered
• Industry Standard for API documentation
• Offers an interactive console to “try” out the API
• Developer and Tester friendly

7. Testing REST APIs

8. Testing REST APIs (the automated way!)

9. Ingredient 1 – REST Assured Wrappers
• Break Rest Assured calls into parts :–
• Create Request
• Execute
• Validate Response
• API Object Model (AOM) on similar lines of Page Object Model (POM)
• Reusability of Code
• Better Maintenance

10. Ingredient 1 – REST Assured Wrappers
https://github.com/kohli-harshit/automated-automation-demo/blob/master/src/test/java/TestPetStore.java

11. Ingredient 1 – REST Assured Wrappers
https://github.com/kohli-harshit/automated-automation-demo/blob/master/src/main/java/api/user/login/GetUserLoginApi.java

12. Ingredient 2 – Swagger Parser
Parse the Swagger documentation using its JSON

13. Ingredient 2 – Swagger Parser
Read JSON using :-
JsonPath (https://github.com/json-path/JsonPath)
JsonSimple (https://github.com/fangyidong/json-simple)

14. Ingredient 3 – Auto Generation of Code
JavaPoet (https://github.com/square/javapoet)
• JavaPoet is a Java library for generating .java source files.
• It offers models for classes & interfaces, fields, methods & constructors, parameters and annotations.
Sample code:

15. Jsonschema2pojo (http://www.jsonschema2pojo.org/)
Generates Plain Old Java Objects from JSON
Ingredient 3 – Auto Generation of Code

16. Ingredient 4 – JavaFX GUI
• Used to create cross platform rich user interfaces
• Easy to create UI through Scene Builder
• CSS Support – CSS Styling can be applied to elements(just like Web!)
• Embraces MVC Design Pattern
• Fast!

17. Ingredient 4 – JavaFX GUI
Steps to create a JavaFX Application in IntelliJ (https://www.jetbrains.com/idea/download):-
1. Create a JavaFX Application in IntelliJ
2. Update FXML using Scene Builder(http://gluonhq.com/products/scene-builder/)
3. Add code to Controller class

18. Open Source version coming soon…

19. Questions ?