<dependencies>
      
      <dependency>
         <groupId>org.testng</groupId>
         <artifactId>testng</artifactId>
         <version>7.4.0</version>
         <scope>test</scope>
      </dependency>
      
      <dependency>
         <groupId>io.rest-assured</groupId>
         <artifactId>rest-assured</artifactId>
         <version>4.3.3</version>
         <scope>test</scope>
      </dependency>
      
      <dependency>
         <groupId>org.json</groupId>
         <artifactId>json</artifactId>
         <version>20210307</version>
      </dependency>
   </dependencies>
   
<build>
    <plugins>
        
        <!-- Compiler plug-in -->
         <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.5.1</version>
            <configuration>
               <source>11</source>
               <target>11</target>
            </configuration>
         </plugin>

         <!-- Added Surefire Plugin configuration to execute tests -->
         <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-surefire-plugin</artifactId>
            <version>3.0.0-M5</version>
            <configuration>
               <suiteXmlFiles>
                  <suiteXmlFile>testng.xml</suiteXmlFile>
               </suiteXmlFiles>
            </configuration>
         </plugin>
      </plugins>
   </build>
</project>

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

import org.json.JSONObject;
import org.testng.annotations.Test;

import io.restassured.http.ContentType;

public class RestAPIDemo {

	@Test(description = "To get the details of employee with id 2", priority = 0)
	public void verifyUser() {

		// Given
		given()
				// When
				.when().get("http://dummy.restapiexample.com/api/v1/employee/2")
				
               // Then
				.then().statusCode(200).statusLine("HTTP/1.1 200 OK")
				
                // To verify booking id at index 2
				.body("data.employee_name", equalTo("Garrett Winters"))
				.body("message", equalTo("Successfully! Record has been fetched."));
	}

	@Test(description = "To create a new employee", priority = 1)
	public void createUser() {

		JSONObject data = new JSONObject();

		// Map<String, String> map = new HashMap<String, String>();

		data.put("employee_name", "APITest");
		data.put("employee_salary", "99999");
		data.put("employee_age", "30");

		// GIVEN
		given().baseUri("http://dummy.restapiexample.com/api").contentType(ContentType.JSON).body(data.toString())

				// WHEN
				.when().post("/v1/create")

				// THEN
				.then().statusCode(200).body("data.employee_name", equalTo("APITest"))
				.body("message", equalTo("Successfully! Record has been added."));

	}
}

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE suite SYSTEM "https://testng.org/testng-1.0.dtd">
<suite name="Suite">
  <test name="Test">
    <classes>
      <class name="com.example.RestAssured_TestNG_Demo.RestAPIDemo"/>
    </classes>
  </test> <!-- Test -->
</suite> <!-- Suite -->

image: adoptopenjdk/maven-openjdk11

stages:
  - test

variables:
  MAVEN_OPTS: "-Dmaven.repo.local=.m2/repository"

test:
  stage: test
  allow_failure: true

# Run the tests
  script:
    - mvn $MAVEN_OPTS clean package
    - mvn compile test

# Store artifacts
  artifacts:
    when: always
    name: "report"
    paths:
    - target/surefire-reports/*
    expire_in: 1 h