Difference between Rest Assured and Karate
Difference between Rest Assured and Karate
What is Rest Assured?
Rest Assured is a Java library used for testing REST APIs. It allows testers and developers to write automated API tests using Java code.
Key Points:
-
Requires Java programming knowledge
-
Works well with TestNG or JUnit
-
Mainly used by developers or automation engineers
-
Good for complex API validation and custom logic
Example (Rest Assured):
import static io.restassured.RestAssured.*;
import static org.hamcrest.Matchers.*;
public class GetUserTest {
@Test
public void testGetUser() {
given()
.when()
.get("https://reqres.in/api/users/2")
.then()
.statusCode(200)
.body("data.first_name", equalTo("Janet"));
}
}What is Karate?
Karate is an API automation framework built on top of Cucumber and Rest Assured.
It allows testers to write API tests using Gherkin syntax (BDD style) without needing strong programming skills.
Key Points:
-
No heavy coding required
-
Uses feature files (.feature)
-
Easy for manual testers to learn
-
Supports API testing, UI testing, and performance testing
Example (Karate):
Feature: Get User API Test
Scenario: Verify user details
Given url ‘https://reqres.in/api/users/2’
When method GET
Then status 200
And match response.data.first_name == ‘Janet’
Key Differences
| Feature | Rest Assured | Karate |
|---|---|---|
| Type | Java Library | API Testing Framework |
| Language | Java | Gherkin (BDD style) |
| Coding Required | High | Very Low |
| Learning Curve | Moderate | Easy |
| Target Users | Developers / Automation Engineers | Testers & QA |
| Built on | Independent library | Built on Rest Assured |
| Test Structure | Java classes | Feature files |
| Readability | Technical | Business readable |
When to Use Rest Assured
Use Rest Assured when:
-
Your team is strong in Java programming
-
You want highly customizable tests
-
You are integrating API tests into a Java automation framework
When to Use Karate
Use Karate when:
-
Testers do not know much programming
-
You want BDD-style readable tests
-
You want faster API automation setup
Simple Way to Remember
-
Rest Assured = Java-based API testing
-
Karate = BDD-style API testing built on Rest Assured
