TestNG Asserts

TestNG also gives us the power to take decisions in the middle of the test run with the help of Asserts. With this we can put various checkpoints in the test. Asserts are the most popular and frequently used methods while creating Selenium Scripts. In selenium there will be many situations in the test where you just like to check the presence of an element. All you need to do is to put an assert statement on to it to verify its existence.

Different Assert Statements

1) Assert.assertTrue() & Assert.assertFalse()

package automationFramework;

import java.util.concurrent.TimeUnit;

import org.openqa.selenium.By;

import org.openqa.selenium.WebDriver;

import org.openqa.selenium.WebElement;

import org.openqa.selenium.firefox.FirefoxDriver;

import org.testng.Assert;

import org.testng.annotations.Test;

public class Asserts {

            private static WebDriver driver;

  @Test

  public void f() {

              driver = new FirefoxDriver();

      driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);

      driver.get("url");

     

      // Here driver will try to find out My Account link on the application

      WebElement myAccount = driver.findElement(By.xpath(".//*[@id='account']/a"));

     

      //Test will only continue, if the below statement is true

      //This is to check whether the link is displayed or not

      Assert.assertTrue(myAccount.isDisplayed());

     

      //My Account will be clicked only if the above condition is true

      myAccount.click();

  }

}

Note: Assert true statement fails the test and stop the execution of the test, if the actual output is false. Assert.assertFalse() works opposite of Assert.assertTrue(). It means that if you want your test to continue only if when some certain element is not present on the page. You will use Assert false, so it will fail the test in case of the element present on the page.

2) Assert.assertEquals()

  @Test

  public void testCompare() {

              String sValue = "Nagarjun Reddy K";

              System.out.println(" What is your name?");

              Assert.assertEquals("Nagarjun Reddy K", sValue);

              System.out.println(sValue);

  }

It also works the same way like assert true and assert fail. It will also stop the execution, if the value is not equal and carry on the execution, if the value is equal.