How to verify JSON response headers in Rest Assured?

We can verify JSON response headers in Rest Assured. This is achieved with the help of the header method. We shall send a GET request via Postman on a mock API, observe the Response Headers.

Headers −

Example

Using Rest Assured, we shall verify the value of the Content-Length in the Headers.

Code Implementation

import org.hamcrest.Matchers;
import org.testng.annotations.Test;
import static io.restassured.RestAssured.given;
import io.restassured.RestAssured;
public class NewTest {
   @Test
   public void ressponseAssertion() {

      //base URL
      RestAssured.baseURI = "https://run.mocky.io";

      //GET operation
      given() .when().get("/v3/6c6ed634-5e78-4b80-94c7-cf17c04c7055").
      then().log().all()

      //verify status code as 200
      .assertThat().statusCode(200)

      //verify body
      .body("Location", Matchers.equalTo("Makinac Island"))

      //verify header
      .header("Content-Length" , "57");
   }
}

Output