How to Test Status Line of API by Rest Assured

 

What is the Status Line of an API?

• The status line is the first line of the HTTP response sent by the server.
• It provides three parts:

HTTP Version → Example: HTTP/1.1 or HTTP/2

Status Code → Example: 200, 404, 500

Reason Phrase → Example: OK, Not Found, Internal Server Error

Example of a status line:

HTTP/1.1 200 OK

In this,

• HTTP/1.1 → HTTP protocol version
• 200 → Status code (success)
• OK → Reason phrase

How to Test Status Line of API in Rest Assured

When testing an API’s status line using Rest Assured, you:

• Send the API Request (GET, POST, etc.).
• Extract the Status Line from the response.
• Verify the Status Line against the expected value.

What to Check in Status Line:

• Ensure HTTP version is correct (e.g., HTTP/1.1).
• Ensure status code is as expected (e.g., 200).
• Ensure reason phrase is correct (e.g., OK).

To test the status line of a GET API using Rest Assured in Java, you need to understand what a status line is and how to retrieve it.

• 
  
  

Example:

HTTP/1.1 200 OK

Steps to Test Status Line Using Rest Assured

• Set the base URI.
• Use given() to prepare the request.
• Use .when().get() to make the GET call.
• Use .then().statusLine() to verify the status line.
• You can also extract the status line using .extract().statusLine().

API to be automated: 

https://reqres.in/api/users?page=2

Maven Dependencies:

<dependency>
    <groupId>io.rest-assured</groupId>
    <artifactId>rest-assured</artifactId>
    <version>5.4.0</version>
    <scope>test</scope>
</dependency>

Java Code Using Rest Assured to Test Status Line

import io.restassured.RestAssured;
import io.restassured.response.Response;

import static io.restassured.RestAssured.*;
import static org.hamcrest.Matchers.*;

public class StatusLineTest {
    public static void main(String[] args) {
        // Set base URI
        RestAssured.baseURI = "https://reqres.in";

        // Send GET request and validate status line
        given()
            .when()
            .get("/api/users?page=2")
            .then()
            .assertThat()
            .statusLine("HTTP/1.1 200 OK");  // Validate full status line

        // Optionally, print the actual status line
        Response response = get("/api/users?page=2");
        String actualStatusLine = response.getStatusLine();
        System.out.println("Status Line is: " + actualStatusLine);
    }
}

Code explanation:

1. Set the base URI

2. Send GET API request

3. validate status line

4. Print the actual status line on console

Output:

Status Line is: HTTP/1.1 200 OK

At a glance:

• Use .statusLine("HTTP/1.1 200 OK") to validate the exact status line.
• Use .getStatusLine() to fetch and print it.
• This is useful to ensure your API response is well-formed and meets expectations.

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