API Testing for Beginners | Using Postman and Rest Assured

API Testing for Beginners Using Postman and Rest Assured

Do terms like REST APIs, JSON, Postman, automation scripts, and REST Assured sound complex or intimidating?
This hands-on, beginner-friendly book is your complete guide to understanding, testing, and automating APIs using the two most in-demand tools in the industry — Postman and REST Assured (Java). Whether you are preparing for interviews, planning a career shift into test automation, or simply want to future-proof your QA skills — this book will give you everything you need to succeed.
🧠 What You’ll Learn:
✅ Core Concepts of API Testing: Understand what APIs are, how they work, and why they are essential in modern applications. Learn about HTTP methods, endpoints, headers, status codes, authentication, and more.
✅ Postman for Manual API Testing:
Master API exploration, request creation, collections, environments, scripting with JavaScript, pre-request scripts, tests, variables, mock servers, and Postman monitors.
✅ REST Assured for Automation:
Build your own API automation framework using REST Assured with Java and TestNG/JUnit. Learn how to write clean, reusable test code and integrate with Maven, JSON Schema Validator, and Allure reports.
✅ Real-World Projects & Practice Assignments:
Automate real-world APIs like user management, e-commerce carts, and file upload/download APIs. Includes challenges and project submission ideas to build your portfolio.
✅ Interview Kit & 100+ Practice MCQs:
Get 50+ frequently asked interview questions, real-time scenario-based challenges, coding snippets, and a massive MCQ bank to solidify your learning and crack job interviews.
💻 Tools Covered:

• Postman – For Manual and Exploratory Testing
• REST Assured (Java) – For Automation Testing
• JSON, XML, and Schema Validation
• Git for Version Control
• Jenkins/GitHub Actions for CI/CD (Intro)

🔥 Why This Book?
🔹 No Assumptions: Written for complete beginners in API testing or automation.
🔹 Structured Learning Path: Basics → Intermediate → Advanced concepts.
🔹 Coding Simplified: Explained with clean, production-ready Java code and real project scenarios.
🔹 Cheat Sheets Included: Postman shortcuts, HTTP status codes, REST Assured patterns, and more.
🔹 Project-Ready Assignments: Build and submit your own framework to impress recruiters or clients.
👨💻 Who This Book Is For:

• QA Testers and Manual Testers entering API automation
• Aspiring Test Automation Engineers
• Computer science students or freshers building projects
• Developers and SDETs looking to strengthen API knowledge
• Professionals preparing for QA interviews or freelancing gigs

✨ What Readers Are Saying (Early Reviews):
“Finally a book that explains REST Assured in plain language. The practice scenarios are gold!”
“I had no idea API testing could be this practical and engaging.”
“The interview section alone is worth the price. Highly recommended for job-seekers!”
If you’re ready to unlock your full potential as a QA or test automation professional, this is the only beginner’s guide to API testing you’ll ever need.