TestNG is a testing framework. It is powerful and easier to use to test the appliication we can automatically test the Application and generate the necessary documentation. The TestNG can have more functionality as comparing to JUnit and NUnit. TestNG is designed to implement all categories of tests like:- unit, functional, end-to-end and integration Testing etc. Here the Below code snippet to Run TestNG Using Java.

package TestNG;

import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.openqa.selenium.support.ui.Select;
import org.testng.annotations.AfterTest;
import org.testng.annotations.BeforeTest;
import org.testng.annotations.Test;



public class TestNGClass {

    WebDriver driver=new FirefoxDriver();


    @BeforeTest
    public void BeforeTestingApp()
    {
        driver.get("http://www.calculator.net");
        driver.manage().window().maximize();
    }

    @Test
    public void TestApp() 
    {
        driver.findElement(By.xpath(".//*[@id='menu']/div[3]/a/img")).click();
        driver.findElement(By.xpath(".//*[@id='menu']/div[4]/div[3]/a")).click();
        driver.findElement(By.id("cpar1")).sendKeys("50");
      driver.findElement(By.id("cpar2")).sendKeys("10");
      driver.findElement(By.xpath(".//*[@id='content']/table/tbody/tr/td[2]/input")).click();

      String result=driver.findElement(By.xpath(".//*[@id='content']/p[2]/span/font/b")).getText();
      System.out.println(result);
      if (result.equals("5")){
         System.out.println("Pass");
      }
      else{
         System.out.println("Fail");
      }



    }

    @AfterTest
    public void AfterTestingApp()
    {
        //driver.close();
    }
}