Why to Use Selenium with TestNG

TestNG is a powerful testing framework, an enhanced version of JUnit which was in use for a long time before TestNG came into existence. NG stands for 'Next Generation'.

TestNG framework provides the following features ?

• Annotations help us organize the tests easily.

• Flexible test configuration.

• Multiple test cases can be grouped more easily.

• Parallelization of tests can be achieved using TestNG.

• Support for data? driven testing.

• Inbuilt reporting as well as supported by Extent Reporting and other reporting tools. Selenium by default doesn't generate any report.

• Easily configured for Cross Browser testing.

• TestNG framework can easily integrate with Maven, Jenkins, Gradle, Ant or any other build tool as well as CI/CD tool.

• TestNG handles some uncaught exceptions as well. Whenever these exceptions occur TestNG fails the test step and the same can be verified in report as well.

• All TestNG annotations can be used in Selenium. Annotations are easy to read and understand.

Selenium allows to interact with webpages. It is an interface not a testing framework. To run any test or code only in selenium we must use java main method. TestNG provides us a framework that runs selenium code without using java main method. Apart from this, better code maintainability, reporting, flexible test configurations are additional advantages of using TestNG along with Selenium.

Approach/Algorithm to Solve this Problem

• Step 1: Make sure Selenium, TestNG and initial set up of Firefox driver is set up in system properly.

• Step 2: Create a TestNG class and write selenium code as mentioned in program code.

• Step 3: Run the TestNGClass file.

• Step 4: Write the same code without TestNG and compare the differences.

Example

The following code to create a TestNG class with Selenium code:

import java.util.concurrent.TimeUnit;
import org.openqa.selenium.*;
import org.openqa.selenium.firefox.FirefoxDriver;
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 launchApp() {
      // Puts an Implicit wait, Will wait for 10 seconds before throwing exception
      driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
      
      // Launch website
      driver.navigate().to("http://www.calculator.net");
      driver.manage().window().maximize();
   }
   
   @Test
   public void calculatePercent() {
      // Click on Math Calculators
      driver.findElement(By.xpath(".//*[@id='menu']/div[3]/a")).click();
      
      // Click on Percent Calculators
      driver.findElement(By.xpath(".//*[@id='menu']/div[4]/div[3]/a")).click();
      
      // Enter value 10 in the first number of the percent Calculator
      driver.findElement(By.id("cpar1")).sendKeys("10");
      
      // Enter value 50 in the second number of the percent Calculator
      driver.findElement(By.id("cpar2")).sendKeys("50");
      
      // Click Calculate Button
      driver.findElement(By.xpath(".//*[@id='content']/table/tbody/tr/td[2]/input")).click();
      
      // Get the Result Text based on its xpath
      String result =
         driver.findElement(By.xpath(".//*[@id='content']/p[2]/span/font/b")).getText();
      
      // Print a Log In message to the screen
      System.out.println(" The Result is " + result);
      
      if(result.equals("5")) {
         System.out.println(" The Result is Pass");
      } else {
         System.out.println(" The Result is Fail");
      }
   }
   
   @AfterTest
   public void terminatetest() {
      driver.close();
   }
}

Output

[TestNG] Running:
  C://Users/**************
  The Result is 5
  The Result is Pass
PASSED: calulatePercent
===============================================
Suite1
Total tests run: 1, Passes: 1, Failures: 0, Skips: 0
=============================================== 

Selenium Code without TestNG

import java.util.concurrent.TimeUnit;
import org.openqa.selenium.*;
import org.openqa.selenium.firefox.FirefoxDriver;

public class SeleniumWithoutTestNG {
public static void main(String[] args) throws InterruptedException {
        WebDriver driver = new FirefoxDriver();
   
   
        // Puts an Implicit wait, Will wait for 10 seconds before throwing exception
        driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);      
      // Launch website
       driver.navigate().to("http://www.calculator.net");
       driver.manage().window().maximize();
      // Click on Math Calculators             driver.findElement(By.xpath(".//*[@id='menu']/div[3]/a")).click();      
      // Click on Percent Calculators      driver.findElement(By.xpath(".//*[@id='menu']/div[4]/div[3]/a")).click();      
      // Enter value 10 in the first number of the percent //Calculator
      driver.findElement(By.id("cpar1")).sendKeys("10");      
      // Enter value 50 in the second number of the percent //Calculator
      driver.findElement(By.id("cpar2")).sendKeys("50");
      
      // Click Calculate Button
      driver.findElement(By.xpath(".//*[@id='content']/table/tbody/tr/td[2]/input")).click();
      
      // Get the Result Text based on its xpath
      String result =         driver.findElement(By.xpath(".//*[@id='content']/p[2]/span/font/b")).getText();      
      // Print a Log In message to the screen
      System.out.println(" The Result is " + result);
      
      if(result.equals("5")) {
         System.out.println(" The Result is Pass");
      } else {
         System.out.println(" The Result is Fail");
      }
      driver.close();
   }
}