API Testing
Spring Boot's testing support is excellent on its own, but pairing it with REST Assured gives you expressive, readable integration tests that cover the full HTTP layer — controllers, serialization, validation, error handling, and everything in between. This guide shows you how to wire the two together and build
API Testing
Field-by-field assertions work fine when an API has three fields. When your API returns a complex nested object with 30 fields, writing individual body("field", equalTo(...)) calls for each one is tedious, fragile, and easy to get wrong. JSON Schema validation solves this: define the expected
API Testing
Authentication is where most API bugs hide. A missing header, an expired token, an incorrect scope — any of these can silently break a protected endpoint in ways that unit tests never catch. REST Assured makes authentication testing straightforward, giving you the tools to verify not just that authenticated requests work,
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.
API Testing
REST Assured and Postman both test REST APIs, but they solve different problems for different audiences.
Testing
Spring Boot and REST Assured are a natural combination. Spring Boot makes building REST APIs fast; REST Assured makes testing them readable.
Testing
While JUnit is the default choice for most Java testing, TestNG offers compelling features for API test suites specifically.
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