API Testing
If you write Java and need to test REST APIs, REST Assured is the most popular library for the job. It lets you write readable, expressive HTTP tests that fit naturally into a JUnit or TestNG test suite. This tutorial walks you through everything from initial setup to writing your
Testing
Testing REST APIs in Java has a reputation for being verbose. You set up an HTTP client, construct requests, execute them, parse the response, and then write assertions against the parsed data — often 20+ lines for a simple GET test. REST Assured changes this. It provides a fluent, BDD-style
Testing
REST Assured's API was designed around the Given-When-Then structure from Behavior-Driven Development. This isn't just a cosmetic choice — tests written in BDD style are executable documentation. They describe what an API is supposed to do in terms that developers, QA engineers, and product
API Testing
REST Assured and Postman both test REST APIs, but they solve different problems for different audiences. Choosing the wrong one creates friction — developers forced into a GUI when they want code, or QA teams drowning in Java when they need something interactive. This guide lays out the real differences so
Testing
Spring Boot and REST Assured are a natural combination. Spring Boot makes building REST APIs fast; REST Assured makes testing them readable. The combination gives you a complete Java API testing stack that covers everything from controller unit tests to full integration tests against a running server. This guide covers
Testing
While JUnit is the default choice for most Java testing, TestNG offers compelling features for API test suites specifically. Test groups, flexible data providers, built-in parallel execution, and dependency management between tests make TestNG well-suited for organizing large API test collections. This guide covers using REST Assured with
Testing
Testing authenticated APIs is unavoidable in any real project. Most production endpoints require authentication — Basic Auth, Bearer tokens, OAuth2, or API keys. REST Assured provides built-in support for common authentication schemes and the flexibility to handle anything custom. This guide covers the patterns you'll actually use. Basic