Selenium

// ich verstehe nicht warum hier die perform() funktioniert nicht fehlt was im Code oder was ? 

package MyTestPakage;
//this Code made by Almo
import org.openqa.selenium.*;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.openqa.selenium.interactions.Action;
import org.openqa.selenium.interactions.Actions;

public class Test {

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

        //Creating a driver object referencing WebDriver interface
        WebDriver driver;

        //Setting webdriver.gecko.driver property
        System.setProperty("webdriver.gecko.driver", "library/geckodriver");

        //Instantiating driver object and launching browser
        driver = new FirefoxDriver();

        //Using get() method to open a webpage
        driver.navigate().to("https://artoftesting.com/sampleSiteForSelenium.html");

        //findig a Elements that we want apply the action on it
        WebElement sourceImage = driver.findElement(By.id("sourceImage"));
        WebElement targetDiv = driver.findElement(By.id("targetDiv"));
        try{
            JavascriptExecutor js = (JavascriptExecutor) driver;
            js.executeScript("scrollBy(0,2500)");

        }catch (JavascriptException jse){
            System.out.println(jse.getMessage());
        }

        // building an Action or Event to apply
        Actions action = new Actions(driver);
        // building an action
        Action dargAndDropAction = action
                .clickAndHold(sourceImage)
                .moveToElement(targetDiv)
                .release(targetDiv)
                .build();
        //performing the Action Event on the Element
        dargAndDropAction.perform();

        //sleep to see the Result
        Thread.sleep(3000);

        //quit the Browser and end the Program
        driver.quit();

    }
}