Can anyone tell whether taking screenshot using selenium(casting takesScreenshot type to driver inst

[Karthik Deepan]

Can anyone tell whether taking screenshot using selenium(casting takesScreenshot type to driver instance) is up casting or down casting?

WebDriver driver = new FirefoxDriver();

driver.get("http://www.google.com/");

File scrFile = ((TakesScreenshot)driver).getScreenshotAs(OutputType.FILE);


FileUtils.copyFile(scrFile, new File("c:\\tmp\\screenshot.png"));

[connect2tech]

It is downcasting.

If you look at source code of FirefoxDriver.

public class FirefoxDriver extends RemoteWebDriver {

}

and

public class RemoteWebDriver implements WebDriver, JavascriptExecutor,
      FindsById, FindsByClassName, FindsByLinkText, FindsByName,
      FindsByCssSelector, FindsByTagName, FindsByXPath,
      HasInputDevices, HasCapabilities, Interactive, TakesScreenshot {
}

Regards,

~NC

https://goo.gl/DEYjrg

[jshw...@gmail.com]

Refer following link for Classes and Interfaces hierarchy in selenium : https://seleniumhq.github.io/selenium/docs/api/java/org/openqa/selenium/TakesScreenshot.html

The answer lies in whether you are up casting browser driver class object to WebDriver.

If you are writing -> WebDriver driver = new ChromeDriver()  [Which is up casting your browser class object to WebDriver]

you need to down cast the object to use the method getScreenShotAs of Interface TakesScreenshot.