Fluentwait in selenium Webdriver and Different usage in Selenium

11 Sep

Wait in Selenium Webdriver is one of the most important topics for real-time applications and for interviews as well. Fluentwait in selenium webdriver in one of the examples of the dynamic wait which will solve many sync issues in Selenium Webdriver.

There are many kinds of wait available in Selenium which are

• Page Load timeout
• Implicit wait
• Explicit wait
• Fluent wait

Fluentwait in selenium webdriver is one of the most versatile wait which will give you the complete power to handle any kind of situation based on your requirement.

Why wait is required

1-Now a day many applications are using AJAX control, Jquery and many other complex widgets which make application slow and data takes some time to appear on screen so we need to wait until data is not present on UI.

2-When you perform the complex operation on any application it also takes some time for processing and we have to make sure our script should wait until specific conditions are not true.

There are much more examples in which we have to apply wait so that our script should not fail and we can get good ROI (Return of investment).

Definition of Fluentwait in selenium webdriver

In simple words, Fluent wait is just a plain class and using this class we can wait until specific conditions are met.

In Fluent wait, we can change the default polling period based on our requirement.

Technical details

1-Fluent wait is a class and is part of org.openqa.selenium.support.ui Package

2-It is an implementation of Wait interface.

3-Each fluent wait instance defines the maximum amount of time to wait for a condition and we can give the frequency with which to check the condition.

4- We can also ignore any exception while polling element such as NoSuchElement exception in Selenium.

Now we have discussed enough on Fluent wait and its usage so let’s talk about the implementation part of it and how we can use in our project or in our framework.

You will also get questions in your interviews that what is the difference between explicit wait and Fluent wait.

Ans- In explicit wait, you can use some set of existing precondition to wait like

Wait till element is not visible, wait till element is not clickable, Wait till presence of element located and so on.

 In Fluent wait, you can customize the apply method and you can write your own conditions based on your requirement.

Note- 95 % of your test can be handled via explicit wait and in some cases, you have to use Fluent wait so it totally up to you.

Syntax of Fluentwait in selenium webdriver

// Waiting 60 seconds for an element to be present on the page, checking

// for its presence once every 2 seconds.

Wait<WebDriver> wait = new FluentWait<WebDriver>(driver)

       .withTimeout(60, SECONDS)

       .pollingEvery(2, SECONDS)

       .ignoring(NoSuchElementException.class);



   WebElement foo = wait.until(new Function<WebDriver, WebElement>() {

     public WebElement apply(WebDriver driver) {

       return driver.findElement(By.id("foo"));

     }

   });

As you can see the syntax is quite complex but we don’t have to worry about that because we have to change only Apply method which will make our task easy.

FluentWait in Selenium Webdriver

Requirement-

1- Click on timer

2- Wait till the WebDriver text is not coming.

3- Once WebDriver appears- Stop the wait and print the status.

Complete program of Fluentwait in selenium webdriver

package class10;

import java.util.concurrent.TimeUnit;

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.FluentWait;

import com.google.common.base.Function;

public class FluentWaitDEmo {

public static void main(String[] args) throws InterruptedException {

           // Start browser

          WebDriver driver = new ChromeDriver();

           // Maximize browser

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

     // Start the application 

     driver.get("http://seleniumpractise.blogspot.in/2016/08/how-to-use-explicit-wait-in-selenium.html");

// Click on timer so clock will start

          driver.findElement(By.xpath("//button[text()='Click me to start timer']")).click();



// Create object of FluentWait class and pass webdriver as input

          FluentWait<WebDriver> wait = new FluentWait<WebDriver>(driver);



           // It should poll webelement after every single second

          wait.pollingEvery(1, TimeUnit.SECONDS);



           // Max time for wait- If conditions are not met within this time frame then it will fail the script

          wait.withTimeout(10, TimeUnit.SECONDS);



       // we are creating Function here which accept webdriver and output as WebElement-

          WebElement element = wait.until(new Function<WebDriver, WebElement>() {



                // apply method- which accept webdriver as input

               @Override

               
public WebElement apply(WebDriver arg0) 
{

      // find the element

       WebElement ele = arg0.findElement(By.xpath("//p[@id='demo']"));

// Will capture the inner Text and will compare will WebDriver

// If condition is true then it will return the element and wait will be over

                     if (ele.getAttribute("innerHTML").equalsIgnoreCase("WebDriver")) 
                      {

                          System.out.println("Value is >>> " + ele.getAttribute("innerHTML"));

                          return ele;

                     }

// If condition is not true then it will return null and it will keep checking until condition is not true

else {
        System.out.println("Value is >>> " + ele.getAttribute("innerHTML"));

           return null;

       }

               }

          });

// If element is found then it will display the status

          System.out.println("Final visible status is >>>>> " + element.isDisplayed());

     }

}

Final thoughts- The same requirement can be fulfilled via explicit wait so its up to you which one to prefer. I would recommend you to create a library for this and you can use whenever it’s required.

In my org, we have created a custom library which takes care of Sync issue and we have to use less explicit wait and fluent wait of Selenium Webdriver.

You can try this wait with multiple scenarios and it’s up to you. In case if you have any thoughts related to this then don’t hesitate to share. Let me know the same in the comment section and if you find this article helpful then feel free to share with your friends as well.