REST Assured

Rest Assured is an open-source Java library that makes testing RESTful web services simple. It allows you to:

Some main features of Rest Assured:

Request building - Easily build HTTP requests using a Domain Specific Language rather than manual header/body setup. Saves time.
Response validation - Inspect response status, body, headers and validate against expectations. Ensures API works as intended.
Parameterization - Externalize test data and define parameters for data-driven, maintainable tests across browsers in parallel.
Pre/post request specification - Define authentication, common headers etc. once to avoid duplication in each test case.
Response extraction using JSON path - Query and extract specific response values for assertions or for use in next request. Handy!
Assertions library - Validate responses using Hamcrest or JUnit matchers for clear pass/fail results in a readable manner.
Logging filter - Log request/response details across tests for easy debugging. Like recording an experiment!
Pretty printing - Print response in pretty/formatted JSON or XML rather than one long string. Makes visualizing responses simpler.
Interactive documentation - Automatically generate API documentation from tests. Great for code documentation and collaboration.
Test runners - Integrate tests with popular runners like JUnit to execute automated regression suites on multiple browsers or servers in parallel.

Postman

Rest Assured

User interface

Code based

Manual + automation

Automation only

Language agnostic

Java specific

Broad API testing

Focused on REST

They can be used together:

Last updated 1 year ago

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Some main features of Rest Assured:

Request building - Easily build HTTP requests using a Domain Specific Language rather than manual header/body setup. Saves time.

Response validation - Inspect response status, body, headers and validate against expectations. Ensures API works as intended.

Parameterization - Externalize test data and define parameters for data-driven, maintainable tests across browsers in parallel.

Pre/post request specification - Define authentication, common headers etc. once to avoid duplication in each test case.

Response extraction using JSON path - Query and extract specific response values for assertions or for use in next request. Handy!

Assertions library - Validate responses using Hamcrest or JUnit matchers for clear pass/fail results in a readable manner.

Logging filter - Log request/response details across tests for easy debugging. Like recording an experiment!

Pretty printing - Print response in pretty/formatted JSON or XML rather than one long string. Makes visualizing responses simpler.

Interactive documentation - Automatically generate API documentation from tests. Great for code documentation and collaboration.

Test runners - Integrate tests with popular runners like JUnit to execute automated regression suites on multiple browsers or servers in parallel.