How to switch and Handle the pop-up window ?

If you want to do any operations in pop-up window you need to switch the control to pop-up window then do all your operations in that and finally close the pop-up window and again select the default (main ) window.

here is WebDriver logic to select Pop-up window

1 . Pop-up window has name/id

     driver.switchTo().window("<window name>");

2. Pop-up window doesn't have name / you don't want to hard code the window name then go for below logic.

Method-1

• before opening pop-up get the main window handle.

             String mainWindowHandle=driver.getWindowHandle();

• open the pop-up (click on element which causes open a new window)

             webElement.click();

• try to get all available open window handles with below command. (the below command returns all window handles as Set)

            Set s = driver.getWindowHandles();

• from that above set try get newly opened window and switch the control to that (pop-up window handle), as we already know the mainWindowHandle.

          Set s = driver.getWindowHandles();

Iterator ite = s.iterator();

while(ite.hasNext())

            {

String popupHandle=ite.next().toString();

if(!popupHandle.contains(mainWindowHandle))

{

driver.switchTo().window(popupHandle);

}

}

• Now control is in pop-up window, do all your operations in pop-up and close the pop-up window.
• Select the default window again.

                 driver.switchTo().window( mainWindowHandle );

Here is an example to switch to the new window:

          String handle = driver.getWindowHandles().toArray()[1];

Method-2

// get  the last window handles before the popup window appears.Which was opened as the last window

driver.switchTo().window(driver.getWindowHandles().iterator().next());

Method-3

// Switch to window by using Page URL

public static void switchToWindow(String objTitle) 
{
 
 String currentWindow=driver.getWindowHandle();
 
 try
 {
 
  Set<String> AllHandle = driver.getWindowHandles();
        for (String han : AllHandle)
        {
              driver.switchTo().window(han);
              try 
              {
                    Thread.sleep(2000);
              } 
              catch (InterruptedException e) 
              {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
              }
              String getTitle = driver.getCurrentUrl();
              if (getTitle.contains(objTitle))
              {
                 System.out.println("Switched to window..."+objTitle);
                 break;
              }
               
        }
  
 }
 catch (Exception e) {
  // TODO: handle exception
 }
  
}

Method-4

// get all the window handles before the popup window appears
 Set beforePopup = driver.getWindowHandles();
     
// click the link which creates the popup window
driver.findElement(by).click();
  
// get all the window handles after the popup window appears
Set afterPopup = driver.getWindowHandles();
     
// remove all the handles from before the popup window appears
afterPopup.removeAll(beforePopup);

// there should be only one window handle left
if(afterPopup.size() == 1) {
          driver.switchTo().window((String)afterPopup.toArray()[0]);
 }

Methods for Handle

// Using JavaScript how to handle the pop with ok and Cancel

( ( JavascriptExecutor ) _driver )
            .executeScript( "window.onbeforeunload = function(e){};" );

You might try using keyboard events. So once the window pops up:

Tab onto the "Ok" button.

//Using Keyboard controls .

driver.Keyboard.PressKey(Keys.Tab);
You'll have to play around to see how many tab presses are required.

Then hit space.

driver.Keyboard.PressKey(Keys.Space);

Yeah it's sort of a hack, but WebDriver is still pretty immature.

//Using Alert

IAlert alert = driver.SwitchTo().Alert();

        alert.Accept(); //for two buttons, choose the affirmative one
        // or
        alert.Dismiss();// to cancel the affirmative decision, i.e., pop up will be dismissed and no action will take place