如何使用 Selenium WebDriver 捕获弹出窗口的屏幕？

Question

I am trying to capture screen of popup window without successes.

i am using this code for "regular" capture screen:

File scrFile = ((TakesScreenshot)alertDialog).getScreenshotAs(OutputType.FILE);
FileUtils.copyFile(scrFile, new File("c:\\tmp\\screenshot.png"));

when pop-up is appear i want to capture the pop-up screen, how i can do it?

public void  checkPopup() throws IOException 
  {
   Alert alertDialog = driver.switchTo().alert();
   File scrFile =    ((TakesScreenshot)alertDialog).getScreenshotAs(OutputType.FILE);
   FileUtils.copyFile(scrFile, new File("c:\\tmp\\screenshot.png"));
   String alertText = alertDialog.getText();
  }

Answer 1

It is currently not possible. Webdriver's screenshot routine works on the DOM only; but the alert exists outside the DOM, it is a separate window, and the screenshot routine has no way to include it.

In Selenium's issue tracker, the problem has been reported and marked as Working As Intended: https://code.google.com/p/selenium/issues/detail?id=4412

Answer 2

It is not possible to take screenshot with the alert box using selenium. Either you need to accept or decline the alert box. Without doing so, it is not possible to capture screenshot. The UnexpectedAlertPresentException is thrown when you do not deal with the alert box. In my scenario, I accept the alert box and take the screenshot of the URL.

Following is the code fragment.

                    Alert alert = driver.switchTo().alert();
                    String alertText = alert.getText();
                    System.out.println("ERROR: (ALERT BOX DETECTED) - ALERT MSG : " + alertText);
                    alert.accept();
                    File outputFile = ((TakesScreenshot) driver).getScreenshotAs(OutputType.FILE);
                    String imageDetails = "C:\\Images";
                    File screenShot = new File(imageDetails).getAbsoluteFile();
                    FileUtils.copyFile(outputFile, screenShot);
                    System.out.println("Screenshot saved: {}" + imageDetails);
                    driver.close();