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How to get Selenium to wait for ajax response?
We can get Selenium to wait for Ajax response. The determination of the load time of the page due to an Ajax response is a difficult task. This can be achieved with the help of synchronization concepts and wait methods in Selenium are −
Implicit wait − It allows the web driver to wait for the time specified after which exception is thrown. This wait is applicable to the all the steps in the test.
Syntax
driver.manage().timeouts().implicitlyWait(5, TimeUnit.SECONDS);
Example
Code Implementation with implicit wait.
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;
import java.util.concurrent.TimeUnit;
public class AjaxImplWt{
public static void main(String[] args) {
System.setProperty("webdriver.chrome.driver",
"C:\Users\ghs6kor\Desktop\Java\chromedriver.exe");
WebDriver driver = new ChromeDriver();
// wait for page load
driver.manage().timeouts().implicitlyWait(5, TimeUnit.SECONDS);
driver.get("https://www.tutorialspoint.com/index.htm");
// identify element
WebElement e=driver.findElement(By.className("gsc-input"));
e.sendKeys("Java");
driver.close();
}
}Ajax response call can also be handled with explicit wait. This wait is applied to a particular element. The wait for the specified time is done for some expected condition for an element. Exception is thrown, once the wait time has elapsed.
Example
Code Implementation with explicit wait.
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;
import java.util.concurrent.TimeUnit;
import org.openqa.selenium.support.ui.ExpectedConditions;
import org.openqa.selenium.support.ui.WebDriverWait;
public class AjaxWaitExplicit{
public static void main(String[] args)
throws InterruptedException{
System.setProperty("webdriver.chrome.driver",
"C:\Users\ghs6kor\Desktop\Java\chromedriver.exe");
WebDriver driver = new ChromeDriver();
driver.get("https://www.tutorialspoint.com/index.htm");
// identify element
WebElement l=driver.findElement(By.xpath("//*[text()='Library']"));
l.click();
//explicit wait condition
WebDriverWait wt = new WebDriverWait(driver,5);
wt.until(ExpectedConditions.
invisibilityOfElementLocated(By.xpath("//*[@class='mui−btn']")));
driver.quit();
}
}We can also add custom ExpectedConditions with Selenium webdriver. We need custom ExpectedConditions when the default expected conditions provided by webdriver are not enough. The method until which is used is a part of the WebDriverWait class.
Example
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;
import java.util.concurrent.TimeUnit;
import org.openqa.selenium.support.ui.ExpectedConditions;
import org.openqa.selenium.support.ui.WebDriverWait;
public class AjaxCustomExpCondition{
public static void main(String[] args)
throws InterruptedException{
System.setProperty("webdriver.chrome.driver",
"C:\Users\ghs6kor\Desktop\Java\chromedriver.exe");
WebDriver driver = new ChromeDriver();
driver.manage().timeouts().implicitlyWait(4, TimeUnit.SECONDS);
driver.get("https://www.tutorialspoint.com/about/about_careers.htm");
// identify element
WebElement l=driver.findElement(By.linkText("Team"));
l.click();
//object of WebDriverWait class
WebDriverWait w = new WebDriverWait(driver,7);
//custom expected condition with until method
w.until(new ExpectedCondition <Boolean> (){
public Boolean apply(WebDriver driver) {
//identify paragraph
WebElement e= driver.findElement(By.tagName("p"));
if (e!= null){
//to check if paragraph is displayed and has text India
if (e.isDisplayed() && e.getText().contains("India")) {
System.out.println("Element found");
return true;
}
else {
System.out.println("Element not found");
return false;
}
}
return false;
}
});
driver.close();
}
}Moreover, the JavaScript Executor can be used to wait for an Ajax call. The executeScript method is used to run a JavaScript command. The wait is till jQuery.active command yields 0.
Example
Code Implementation with JavaScript.
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.JavascriptExecutor;
public class AjaxJavaScrptWt{
public static void main(String[] args) {
System.setProperty("webdriver.chrome.driver",
"C:\Users\ghs6kor\Desktop\Java\chromedriver.exe");
WebDriver driver = new ChromeDriver();
driver.get("https://www.tutorialspoint.com/index.htm");
//wait with JavaScript Executor
while (true){
if ((Boolean) ((JavascriptExecutor)driver).
.executeScript("return jQuery.active == 0")){
break;
}
Thread.sleep(500);
}
}
}
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