What is Rest Assured?
- Rest Assured is an open-source Java library designed specifically for testing RESTful web services (APIs).
- It simplifies the process of sending HTTP requests (like GET, POST, PUT, DELETE) and validating responses without requiring a lot of boilerplate code.
- Instead of writing complex HTTP client code, testers can write concise, readable, and maintainable API tests.
- It provides a domain-specific language (DSL) for writing readable, maintainable, and expressive API test cases.
Why Rest Assured is Used
- To automate API testing efficiently.
- To verify functionality, performance, and security of APIs.
- To reduce manual testing effort (compared to tools like Postman).
- To ensure APIs return correct status codes, headers, and data.
Below are some key features of Rest Assured Framework:
| Feature | Description |
|---|---|
| HTTP Methods Support | Supports GET, POST, PUT, PATCH, DELETE, OPTIONS, HEAD. |
| Request Customization | Allows adding headers, query parameters, path parameters, cookies, and body data easily. |
| Response Validation | Provides easy methods for verifying status code, headers, content types, response body, etc. |
| JSON & XML Parsing | Built-in support for parsing and asserting on JSON and XML responses. |
| Authentication | Supports Basic, Digest, Form, OAuth1, OAuth2, and custom authentication. |
| Integration | Can be used with JUnit, TestNG, Cucumber, and other Java testing tools. |
| Logging | Supports logging request and response data for debugging purposes. |
| Schema Validation | Can validate responses against JSON/XML schema. |
| Serialization/Deserialization | Easily works with POJOs using libraries like Jackson or Gson. |
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