Rest Assured: Validate Response body

Using ‘body’ method, we can validate response body.

For example, when you hit the API ‘http://localhost:8080/api/v1/employees/by-names?firstName=Gopi&lastName=Battu’, you will get below response.

[

    {

        "id": 7,

        "firstName": "Gopi",

        "lastName": "Battu"

    }

]

You can validate id, firstName and lastName of the employee using below snippet.

Example

given().param("firstName", "Gopi")

       .param("lastName", "Battu")

       .header("Accept", "application/json")

       .when()

       .get("api/v1/employees/by-names")

       .then()

       .assertThat()

            .statusCode(200).and()

            .contentType(ContentType.JSON).and()

            .body("[0].id", equalTo(7)).and()

            .body("[0].firstName", equalTo("Gopi")).and()

            .body("[0].lastName", equalTo("Battu"));

TestApp.java

package com.sample.app;

import static io.restassured.RestAssured.given;
import static org.hamcrest.Matchers.equalTo;

import org.junit.Test;

import io.restassured.RestAssured;
import io.restassured.http.ContentType;

public class TestApp {

    @Test
    public void testApp() {
        RestAssured.baseURI = "http://localhost:8080";

        given().param("firstName", "Gopi").param("lastName", "Battu").header("Accept", "application/json").when()
                .get("api/v1/employees/by-names").then().assertThat().statusCode(200).and()
                .contentType(ContentType.JSON).and().body("[0].id", equalTo(7)).and()
                .body("[0].firstName", equalTo("Gopi")).and().body("[0].lastName", equalTo("Battu"));

    }

}

 ‘equalTo’ is a hamcrest matcher to validate the response. If you would like to know more about hamcrest, I would recommend you to go through my below post.

https://self-learning-java-tutorial.blogspot.com/2018/02/hamcrest-tutorial.html

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