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Post By Admin Last Updated At 2020-06-15
Selenium wait statements

The last topic in the Selenium Tutorial is wait functions. While executing the test cases, this selenium wait statements plays a major role. And we people were familiar with wait() in programming languages like JAVA. But have you ever think of

Why do people use Wait () Selenium?

Today most of the web application uses Ajax and JAVA Script. And if the browser loads, it takes different times to load the elements. The reasons for taking the variable timings to load these elements depends on the variable factors.  Moreover, there are some cases where the element is not located at the location given in the code. At this time, this throws an ElementNotVisible Exception. So to avoid this problem, we use Wait().

What Wait() does?

It usually waits for a certain period of time for the element to load in the application. And it closes the application if the elements cannot be loaded in the given amount of time. The waits are usually classified into two types like

  1. Explicit Waits
  2. Implicit Waits

Implicit Waits ():

This wait tells the web driver to wait for a certain amount of time before it throws an exception. Once we set the time, the driver will wait for the time we have set, before it throws an exception. And one thing you should remember that the default is set to zero. And we need to mention some time to make web driver wait for the specified amount of time. The syntax for the implicit waits is shown below:


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

This implicit wait accepts two parameters. The first parameter accepts time as an integer value and the second parameter accepts time measurement in terms of Days, hours, Minutes, Seconds, Milliseconds, Microseconds, Nano Seconds etc.

Execute the following  Online education code  in your IDE to perform the implicit Wait()

package SoftwareTesting;import java.util.concurrent.TimeUnit;import org.openqa.selenium.By;// import Web driverimport org.openqa.selenium.WebDriver;import org.openqa.selenium.chrome.ChromeDriver;// import Testimport org.testng.annotations.Test;public class AppTest {

protected WebDriver driver;@Testpublic void seleniumtutorials() throws InterruptedException{System.setProperty ("webdriver.chrome.driver",".\\chromedriver.exe" );driver = new ChromeDriver();driver.manage().timeouts().implicitlyWait(10,TimeUnit.SECONDS) ;String eTitle = "Selenium Tutorial | OnlineITGuru";String aTitle = "" ;// launch Chrome and redirect it to the Base URLdriver.get("https://onlineitguru.com/onlinetutorials/selenium" );//Maximizes the browser windowdriver.manage().window().maximize() ;//get the actual value of the titleaTitle = driver.getTitle();//compare the actual title with the expected titleif (aTitle.equals(eTitle)){System.out.println( "Test Passed") ;}else {System.out.println( "Test Failed" );}//close browserdriver.close();}}

Also Check What is POM in Selenium ?

Explicit Wait():

These are confined to a particular web element. Here, you can define a wait() for a certain condition before it proceeds further. And this Explicit wait is of two types ():

a)Web Driver Wait()

b)Fluent Wait()

a)Web Driver Wait():

This wait() is applied to a certain element with the expected condition and time. Moreover, it is applied to a certain element. Besides, it allows throws an expectation, when the element is not found.

The Explicit wait contains the following expected conditions

  1. titleIs()
  2. titleContains()
  3. alertIspresent()
  4. elementSelectionStateToBe()
  5. elementToBeClickable()
  6. elementToBeSelected()
  7. InvisibilityOfElementLocated()
  8. InvisibilityOfElementWithText()
  9. presenceOfAllElementsLocatedBy()
  10. presenceOfElementLocated()
  11. frameToBeAvailableAndSwitchToIt()
  12. visibilityOf()
  13. visibilityOfAllElements()
  14. visibilityOfAllElementsLocatedBy()
  15. visiilityOfElementLocated()
  16. textToBePresentInElement()
  17. textToBePresentInElementLocated()
  18. textToBePresentInElementValue()

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It defines the maximum amount of time,to wait for a specific condition and frequency. This usually check the condition before throwing the ElementNotVisibleException  exception.  In simple words , it tries to find the web element repeatedly at regular intervals until time (or) object found. We mainly use this command , if the web elements is visible for few seconds especially in Ajax Applications.  The syntax of this method is shown below


Wait wait = new FluentWait(WebDriver reference).withTimeout(timeout, SECONDS).pollingEvery(timeout, SECONDS).ignoring(Exception.class);

WebElement foo=wait.until(new Function() {public WebElement applyy(WebDriver driver) {return driver.findElement(By.id("foo"));}});

This FluentWait() has two paramters namely timeoutvalue and polling frequency.

Consider the example shown below

Wait wait = new FluentWait(driver).withTimeout(45, TimeUnit.SECONDS).pollingevery(5, TimeUnit.SECONDS).ignoring(NoSuchElementException.class);

In the above example maximum waiting time is 45 seconds. And  the frequency is 5 seconds to check the sucess (or) failure of the specific condition.

Practice the below code in your IDE to execute the fluentWait()

package Seleniumtutorial;

import org.testng.annotations.Test;import java.util.NoSuchElementException;// Include functionsimport java.util.concurrent.TimeUnit;import java.util.function.Function;//launch Selenium packageimport org.openqa.selenium.By;import org.openqa.selenium.WebElement;// import driversimport org.openqa.selenium.chrome.ChromeDriver;import org.openqa.selenium.WebDriver;// lanch Exception classesimport org.openqa.selenium.support.ui.ExpectedConditions;import org.openqa.selenium.support.ui.FluentWait;// launch UI waitsimport org.openqa.selenium.support.ui.Wait;import org.openqa.selenium.support.ui.WebDriverWait;//Launch Testimport org.testng.annotations.Test;

public class AppTest3 {protected WebDriver driver;@Testpublic void onlineitgurututorials() throws InterruptedException{System.setProperty ("webdriver.chrome.driver",".\\chromedriver.exe" );String eTitle = "Selenium tutorial | OnlineITGuru";String aTitle = "" ;driver = new ChromeDriver();// launch Chrome and redirect it to the Base URLdriver.get("https://onlineitguru.com/onlinetutorials/selenium" );//Maximizes the browser windowdriver.manage().window().maximize() ;//get the actual value of the titleaTitle = driver.getTitle();//compare the actual title with the expected titleif (aTitle.contentEquals(eTitle)){System.out.println( "Test Passed") ;}else {System.out.println( "Test Failed" );}

Wait wait = new FluentWait(driver).withTimeout(30, TimeUnit.SECONDS).pollingEvery(5, TimeUnit.SECONDS).ignoring(NoSuchElementException.class);WebElement clickseleniumlink = wait.until(new Function(){

public WebElement apply(WebDriver driver ) {return driver.findElement(By.xpath("/html/body/div[1]/section/div[2]/div/div[1]/div/div[1]/div/div/div/div[2]/div[2]/div/div/div/div/div[1]/div/div/a/i"));}});//click on the selenium linkclickseleniumlink.click();//close~ browserdriver.close() ;}}


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