What are the ways to validate the response body of Rest APIs using RestAssured?

Generally, we use below 2 ways to validate the response body of any RestAPI using RestAssured.

• Using Contains method of Collection class.
• Using JsonPath

If  I take the previous example from my post where I showed the use of HTTP GET method for extraction of weather information. Please use the below example

import io.restassured.RestAssured;

import io.restassured.http.Header;

import io.restassured.http.Headers;

import io.restassured.response.Response;

import io.restassured.specification.RequestSpecification;

public class RestGet

{

public static void main(String args[])

{

RestAssured.baseURI="http://restapi.demoqa.com/utilities/weather/city";

RequestSpecification req=RestAssured.given();

Response res=req.get("/Noida");

System.out.println(res.body().asString());

}

}

The output of the above code is as below where we are getting the weather information for Noida.

{

    "City": "Noida",

    "Temperature": "10 Degree celsius",

    "Humidity": "100 Percent",

    "WeatherDescription": "mist",

    "WindSpeed": "2.57 Km per hour",

    "WindDirectionDegree": "343 Degree"

}

Now we have to validate that whether "Noida" as a text available in the response or not. So, if i go with the 1st way then we have to include the follwing line in the above java code, which return a boolean value like True or False.

System.out.println(res.getBody().asString().contains("Noida"));

If I add the above line in the code then the output would be 

{

    "City": "Noida",

    "Temperature": "10 Degree celsius",

    "Humidity": "100 Percent",

    "WeatherDescription": "mist",

    "WindSpeed": "1.96 Km per hour",

    "WindDirectionDegree": "342 Degree"

}

true 

But what happens if you want to extract the individual value in {key,value} pair from response code then we can use the 2nd way i.e. JsonPath.  Also, need to import the below Jar file.

import io.restassured.path.json.JsonPath;

Find the below code for the same.

import io.restassured.RestAssured;

import io.restassured.path.json.JsonPath;

import io.restassured.response.Response;

import io.restassured.specification.RequestSpecification;

public class Rest1

{

public static void main(String args[])

{

RestAssured.baseURI="http://restapi.demoqa.com/utilities/weather/city";

RequestSpecification req=RestAssured.given();

Response res=req.get("/Noida");

System.out.println(res.body().asString());

JsonPath j=res.jsonPath();

System.out.println("City value is :"+j.get("City").toString());

System.out.println("Temperature is :"+j.get("Temperature").toString());

if(j.get("City").equals("Noida"))

{

System.out.println("Test case passed");

}

else

{

System.out.println("Test case failed");

}

}

}

Output for the above code:

{

    "City": "Noida",

    "Temperature": "9 Degree celsius",

    "Humidity": "100 Percent",

    "WeatherDescription": "mist",

    "WindSpeed": "1.96 Km per hour",

    "WindDirectionDegree": "342 Degree"

}

City value is :Noida

Temperature is :9 Degree celsius

Test case passed

'**********************************************************************

Please comment if you have any questions on this.

Best Of Luck!