Using ExpectedConditions for explicit wait in Selenium Webdriver.

In this article, we will discuss on different explicit wait asking the test script to wait for some time based on the expectedcondition for object defined by locator.Before discussing further, let us have a look at generic syntax for adding an explicit wait in the test using expected condition.

WebDriverWait wait = new WebDriverWait(driver, 1000);

wait.until(ExpectedConditions.presenceOfElementLocated(By.linkText("QAmail"))); 

In the first statement, we create an instance wait of the WebdriverWait object with arguments as driver object and the time to wait for existence of element.

In the next statement, we are asking the script to wait until the expected condition is met. In the above script, test script will wait for max 1000 second for element identified with linkText as "QAmail" to be available in the DOM for the page.

Let us define what are the different ways to use expected condition based on which we can add explicit wait in the object.

a. presenceOfElementLocated - Verify presence of element in the DOM.

WebDriverWait wait = new WebDriverWait(driver, 1000);

wait.until(ExpectedConditions.presenceOfElementLocated(By.linkText("QAmail"))); 

b. Using elementToBeClickable

wait.until(ExpectedConditions.elementToBeClickable(By.linkText("TGmail")));

c. Using invisibilityOfElementLocated

wait.until(ExpectedConditions.invisibilityOfElementLocated(By.linkText("tGmail")));

 

d. invisibilityOfElementWithText - Validating the invisibility of element with text for the element provided.

wait.until(ExpectedConditions.invisibilityOfElementWithText(By.xpath("//div[@id='_eE']"), "tGmail")); 

e. textToBePresentInElement - Validating the text to be present in the element defined by locator.

wait.until(ExpectedConditions.textToBePresentInElement(By.xpath("//div[@id='_eE']"),"Gmail")); 

f. visibilityOfElementLocated by locator.

wait.until(ExpectedConditions.visibilityOfElementLocated(By.xpath("//div[@id='_eE']"))); 

g. titleContains - Wait until the title is displayed correctly

wait.until(ExpectedConditions.titleContains("QA Automation QTP"));

h. alertIsPresent - waits for alert to appear in the window.

wait.until(ExpectedConditions.alertIsPresent());

How to get attributes values of element in Selenium using getAttribute Method

Using getAttribute, we can extract the value of attribute of an element in Selenium WebDriver. Extracting values of attribute of element can be helpful in a number of ways. Some of the important use of getattribute method are as follows: 

• Name of all the links or button or an object type in the Page.

• Validating if object with particular property exists in the Page.

• Extracting the href value for a button/link.

• Extracting values of element of a particular class or Id. For e.g: If error message are displayed on the page with the same class. We can get all the error messages displayed getting text attribute for all element with the common class name.

Below code explains use of getattribute in Selenium Webdriver for the above purpose.

 package testproject;  
 import java.io.File;  
 import java.util.List;  
 import org.openqa.selenium.By;  
 import org.openqa.selenium.WebDriver;  
 import org.openqa.selenium.WebElement;  
 import org.openqa.selenium.ie.InternetExplorerDriver;  
 public class testingC {  
      static WebDriver driver;  
      public static void main(String[] args) throws InterruptedException {  
           // Connect to the Internet driver server and create an instance of Internet explorer driver.       
           File file = new File("D:\\selenium\\IEDriverServer.exe");  
           System.setProperty("webdriver.ie.driver", file.getAbsolutePath());       
           try{  
                driver = new InternetExplorerDriver();  
       driver.manage().window().maximize();  
           }  
           catch(Exception e)  
           {  
                driver=new InternetExplorerDriver();  
           }  
           driver.navigate().to("https://google.com");  
           //function to get names of all the links in the Page  
           getALLNameforObject("link");  
           // function to validate a particular object with particular text appears in the Page  
           ValidateObjectExists("link", "About");       
           //   
      }  
      public static void getALLNameforObject(String strObject)  
       {  
           if(strObject.toLowerCase().trim().contentEquals("link"))  
           {  
                strObject = "a";  
           }  
           if(strObject.toLowerCase().trim().contentEquals("button"))  
           {  
                strObject = "button";  
           }  
           List<WebElement> elemLink = driver.findElements(By.tagName(strObject));  
           int intLinksinPage = elemLink.size();  
           System.out.println(intLinksinPage);  
           for (int i = 0;i<intLinksinPage;i++)  
           {  
                System.out.println("The name of the link " + (i+1) +" in the page is :- " + elemLink.get(i).getAttribute("text"));  
           }  
      }  
      public static void ValidateObjectExists(String strObject, String ObjName)  
       {  
           if(strObject.toLowerCase().trim().contentEquals("link"))  
           {  
                strObject = "a";  
           }  
           if(strObject.toLowerCase().trim().contentEquals("button"))  
           {  
                strObject = "button";  
           }  
           List<WebElement> elemLink = driver.findElements(By.tagName(strObject));  
           int intLinksinPage = elemLink.size();  
           System.out.println(intLinksinPage);  
           for (int i = 0;i<intLinksinPage;i++)  
           {  
                if(elemLink.get(i).getAttribute("text").contentEquals(ObjName))  
                {  
                     System.out.println("Link exists in Page with text " + elemLink.get(i).getAttribute("text"));  
                }  
           }  
      }  
 }  

Highlighting an element using JavaScriptexecutor: Selenium Code Solution

Problem Statement: How to highlight an element in Selenium Webdriver?

Solution : We can highlight an element in Selenium WebDriver by creating a custom method to highlight an element using JavaScriptexecutor.

What is JavaScriptexecutor?

JavaScriptexecutor class provides mechanism to execute Javascript through selenium driver. JavaScript executor provides two methods to execute javascript in the code:

a.) executeAsyncScript - Execute an asynchronous code of JavaScript
b.) executeScript - Executes a code of JavaScript.

Parameters for the two methods are the Script to be executed and arguments for the script.

Below package needs to be imported to use JavascriptExecutor:

import org.openqa.selenium.JavascriptExecutor;

Below code explains how to use JavaScriptExecutor to highlight an element in Selenium WebDriver using Java.

 import java.io.File;  
 import org.openqa.selenium.By;  
 import org.openqa.selenium.JavascriptExecutor;  
 import org.openqa.selenium.WebDriver;  
 import org.openqa.selenium.WebElement;  
 import org.openqa.selenium.ie.InternetExplorerDriver;  
 public class testingC {  
      static WebDriver driver;  
      public static void main(String[] args) throws InterruptedException {  
           // Connect to the Internet driver server and create an instance of Internet explorer driver.       
           File file = new File("D:\\selenium\\IEDriverServer.exe");  
           System.setProperty("webdriver.ie.driver", file.getAbsolutePath());       
           try{  
                driver = new InternetExplorerDriver();  
                //added new line to maximise browser on launch  
       driver.manage().window().maximize();  
           }  
           catch(Exception e)  
           {  
                driver=new InternetExplorerDriver();  
           }  
           //Navigate to the webpage and identify the element to be highigted  
           driver.navigate().to("https://qaautomationqtp.blogspot.com");  
           WebElement element = driver.findElement(By.linkText("Play"));  
           //highlight the element  
            methodhighlightElement(element);  
         element.click();            
      }  
      public static void methodhighlightElement(WebElement element) throws InterruptedException   
       {  
         JavascriptExecutor js = (JavascriptExecutor) driver;  
         js.executeScript("arguments[0].setAttribute('style','border: solid 8px blue')", element);   
         Thread.sleep(2000);  
         js.executeScript("arguments[0].setAttribute('style', arguments[1]);", element, "");  
      }  
 }