Selenium Exception-NoSuchElementException

NoSuchElementException : This Exception Produce when FindBy method can’t find the element.

Thrown by WebDriver.findElement(By by) and WebElement.findElement(By by).

---

Hierarchy of  NoSuchElementException :

·         java.lang.Object

·         java.lang.Throwable

·         java.lang.Exception

·         java.lang.RuntimeException

·         org.openqa.selenium.WebDriverException

·         org.openqa.selenium.NotFoundException

·         org.openqa.selenium.NoSuchElementException

                                             

---

Reasons of NoSuchElementException:

• We  specified wrong  Locator(ID, Name, Link Text, CSS Selector, DOM (Document  Object Model), XPath etc.) for the element.
• The element is not on the page.          
• We are not waiting enough on the page for that element to load

---

A).Locator is wrong and element is not on the page.

Example1 : Here we are generating  NoSuchElementException   through  wrong  xpath:

Actual  XPath of  “ Older Post “ link- .//*[@id='Blog1_blog-pager-older-link']

We are putting wrong xpath   “.//*[@id='Blog11_blog-pager-older-link']”  in below example

package example;

import org.openqa.selenium.By;

import org.openqa.selenium.WebDriver;

import org.openqa.selenium.WebElement;

import org.openqa.selenium.chrome.ChromeDriver;

import org.testng.annotations.AfterTest;

import org.testng.annotations.BeforeTest;

import org.testng.annotations.Test;

public class NoSuchElementException_Example

{

      WebDriver driver;

     

      @BeforeTest

      public void beforeTest()

      { //Set Path of the latest ChromeDriver.exe file

      System.setProperty("webdriver.chrome.driver","E:\\Jars\\chromedriver.exe");

      //Create the Object of chrome driver

      driver = new ChromeDriver();

      //maximize the browser window

      driver.manage().window().maximize();

      String url="http://selenium-code.blogspot.in/2017/08/selenium-exception-      

      nosuchelementexcepti.html";

      //Open URL in Web Browser

      driver.get(url);

      }

     

      //set Test Priority to execution

      @Test(priority=1)

      public void test() throws InterruptedException

      {   //apply static wait of 5000 millisecond 

            Thread.sleep(5000);

            // find the element "Older Post" through xpath locator and create link type object of     

             WebElement

             WebElement link= driver.findElement(By.xpath("//*[@id='Blog11_blog-pager-older-

             link']"));

              //click on link

              link.click();

           

       }

     

      @AfterTest

      public void aftertest()

      {   //Close all the instance of  browser                                                                                                                            

            driver.quit();

      }

     

}

Output-With Wrong Xpath

Starting ChromeDriver 2.30.477700 (0057494ad8732195794a7b32078424f92a5fce41) on port 17423

Only local connections are allowed.

Aug 05, 2017 5:24:56 PM org.openqa.selenium.remote.ProtocolHandshake createSession

INFO: Detected dialect: OSS

FAILED: test

org.openqa.selenium.NoSuchElementException: no such element: Unable to locate element: {"method":"xpath","selector":"//*[@id='Blog11_blog-pager-older-link']"}

  (Session info: chrome=59.0.3071.115)

Example 2:

package example;

import org.openqa.selenium.By;

import org.openqa.selenium.WebDriver;

import org.openqa.selenium.WebElement;

import org.openqa.selenium.chrome.ChromeDriver;

import org.testng.annotations.AfterTest;

import org.testng.annotations.BeforeTest;

import org.testng.annotations.Test;

public class NoSuchElementException_Example

{ WebDriver driver;

     

      @BeforeTest

      public void beforeTest()

      { //Set Path of the latest ChromeDriver.exe file

      System.setProperty("webdriver.chrome.driver","E:\\Jars\\chromedriver.exe");

      //Create the Object of chrome driver

      driver = new ChromeDriver();

      //maximize the browser window

      driver.manage().window().maximize();

      String url="http://selenium-code.blogspot.in/2017/08/selenium-exception-

      nosuchelementexcepti.html";

      //Open URL in Web Browser

      driver.get(url);

      }

     

      //set Test Priority to execution

      @Test(priority=1)

      public void test() throws InterruptedException

      {   //apply static wait of 5000 millisecond 

            Thread.sleep(3000);

            // find the element "Older Post" through xpath locator and create link type object of 

            WebElement

            WebElement link= driver.findElement(By.xpath("//*[@id='Blog1_blog-pager-older-

            link']"));

            //click on link

            link.click();

            Thread.sleep(2000);

           

      }

     

      @AfterTest

      public void aftertest()

      {   //Close all the instance of browser                                                                                                                           

            driver.quit();

      }

     

}

Output-(with Right Xpath)

Starting ChromeDriver 2.30.477700 (0057494ad8732195794a7b32078424f92a5fce41) on port 16277

Only local connections are allowed.

Aug 05, 2017 5:33:19 PM org.openqa.selenium.remote.ProtocolHandshake createSession

INFO: Detected dialect: OSS

PASSED: test

===============================================

    Default test

    Tests run: 1, Failures: 0, Skips: 0

===============================================

---

B). We are not waiting enough on the page for that element to load:

·         1) The page is still being rendered and  we have  already finished our  element search then we obtain  NoSuchElementException.

How Can Handle this type of Situation :

We can apply below codes to remove this exception condition

1.      By applying  WebDriverWait, webdriver object  wait for a specific time (in second) of an    element for its visibility.

              

              WebDriverWait wait = new WebDriverWait(driver, 10);       

               wait.until(ExpectedConditions.visibilityOf(link));

  

 

2.  We can handle NoSuchElementException through try-catch block inside Generic method

                

    

         public boolean isElementPresent(By by) {

         boolean isPresent = true;

         try {

         driver.findElement(by);

         } catch (NoSuchElementException e) {

          isPresent = false;

         }

        return isPresent

        }

Example 3:

package example;

import org.openqa.selenium.By;

import org.openqa.selenium.WebDriver;

import org.openqa.selenium.WebElement;

import org.openqa.selenium.chrome.ChromeDriver;

import org.openqa.selenium.support.ui.ExpectedConditions;

import org.openqa.selenium.support.ui.WebDriverWait;

import org.testng.annotations.AfterTest;

import org.testng.annotations.BeforeTest;

import org.testng.annotations.Test;

public class NoSuchElementException_Example

{ WebDriver driver;

     

      @BeforeTest

      public void beforeTest()

      { //Set Path of the latest ChromeDriver.exe file

      System.setProperty("webdriver.chrome.driver","E:\\Jars\\chromedriver.exe");

      //Create the Object of chrome driver

      driver = new ChromeDriver();

      //maximize the browser window

      driver.manage().window().maximize();

      String url="http://selenium-code.blogspot.in/2017/08/selenium-exception-

       nosuchelementexcepti.html";

      //Open URL in Web Browser

      driver.get(url);

      }

     

      //set Test Priority to execution

      @Test(priority=1)

      public void test() throws InterruptedException

      {   //apply static wait of 5000 millisecond 

            Thread.sleep(3000);

            // find the element "Older Post" through xpath locator and create link type object of      

            WebElement

             WebElement link= driver.findElement(By.xpath("//*[@id='Blog1_blog-pager-older-

             link']"));

             // Pass time in second (10) to wait of element on screen

             WebDriverWait wait = new WebDriverWait(driver, 10);

             wait.until(ExpectedConditions.visibilityOf(link));

             System.out.println("Apply wait of 10 second for visibility of Element");

        

             //click on link

              link.click();

             Thread.sleep(2000);

           

           

      }

     

      @AfterTest

      public void aftertest()

      {   //Close all the instance of browser                                                                                                                           

            driver.quit();

      }

     

}

OutPut—With WebDriverWait

Starting ChromeDriver 2.30.477700 (0057494ad8732195794a7b32078424f92a5fce41) on port 12756

Only local connections are allowed.

Aug 05, 2017 6:29:11 PM org.openqa.selenium.remote.ProtocolHandshake createSession

INFO: Detected dialect: OSS

Apply wait of 10 second for visibility of Element

PASSED: test

===============================================

    Default test

    Tests run: 1, Failures: 0, Skips: 0

===============================================

===============================================

Default suite

Total tests run: 1, Failures: 0, Skips: 0

===============================================