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.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
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
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
===============================================
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