This document provides an introduction to API testing using Postman. It begins with a brief overview of APIs, including what they are, their history and common types. It then covers API testing in more detail, explaining what it is, common types of API tests and advantages/challenges. Next, it discusses common API protocols, HTTP request methods and response codes. Finally, it introduces Postman, describing its basic building blocks and providing a short demo. The overall purpose is to educate attendees on APIs and API testing using Postman.

1. API testing for
everyone

2. I am Pricilla
Team Leader, Billennium IT Services (M) Sdn. Bhd.
You can find me at @pricillabelwin
Hello!
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3. What’s on the agenda today
◉ Brief introduction to APIs
◉ Deep dive into API Testing
◉ Introduction to Postman
◉ Demo
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4. “
The only way you can stay on top
is to remember to touch bottom
and get back to basics - Shane
Black
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5. Introduction to
APIs
Are you wondering what is an API?
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6. API stands for Application
Programming Interface
API is a set of routines, protocols,
and tools for building Software
Application
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7. History of APIs
● Late 1990s as web services.
● Salesforce released its first API in 2000.
● Amazon, Flickr, Facebook, and Twitter

8. Types of APIs
Public
Open to anyone. Ex:
Google APIs
Private
Requires specific
rights or license. In-
house APIs
Shared/Partner
Requires specific
rights or license. Ex:
Expedia, Airbnb
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9. What is an API call?

10. Types of API Protocols
● SOAP (Simple Object Access Protocol)
● REST (REpresentational State Transfer)
● GraphQL
● JSON-RPC (JavaScript Object Notation- Remote Procedural Call)
● gRPC (Google Remote Procedural Call)
● XML-RPC (Extensible Markup Language Remote Procedural Call)
● Apache Thrift

11. HTTP Request methods

12. HTTP Response codes

13. API Testing
What, How, Why?
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14. What is API Testing?
API testing is the process of sending requests to an
API and monitoring the responses to ensure its
behaving as expected.

15. Types of API Testing
● Validation Testing
● Functional Testing
● Integration Testing
● Security Testing
● Performance Testing
● Reliability Testing
● API Documentation Testing
● Regression Testing

16. Advantages of API Testing
● Earlier Testing
● Faster
● Efficient
● Language independent
● Less maintenance

17. Challenges in API Testing
● Lack of documentation
● Initial Project setup
● Tool selection
● Without UI, tough to visualize the flow
● Unstable APIs
● Exceptional handling
● Lack of skilled testers

18. Tools available

19. Introduction to
Postman
Play your heart out
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20. Building blocks of Postman
● Collections
● Request/Response
● Variables
● Environments

21. Postman HOME page
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22. Small exercises

23. Any questions ?
Thanks!
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24. Credits
Special thanks to all the people who made and
released these awesome resources for free:
◉ Presentation template by SlidesCarnival
◉ Photographs by Unsplash
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