Firefox alert box not detected with Selenium WebDriver

Question

ERROR net.serenitybdd.core.Serenity - No alert is present (WARNING: The server did not provide any stacktrace information)

I get this erro

Answer 1

You might need to add code to wait for the alert to be visible. Selenium can't tell if JavaScript has finished executing.

waitForAlert(WebDriver driver)
{
   int i=0;
   while(i++<5)
   {
        try
        {
            Alert alert = driver.switchTo().alert();
            break;
        }
        catch(NoAlertPresentException e)
        {
          Thread.sleep(1000);
          continue;
        }
   }
}

Answer 2

A little more elegant solution :

WebDriverWait wait = new WebDriverWait(driver, timeout);
wait.until(ExpectedConditions.alertIsPresent());

Use the WebDriverWait, every time you have dynamic element that are not present when the page is done loading, like alert, popupwindow, modal popup, hiden element which turn visible,.