Switch between browsers\windows and pop ups

These commands can be used to switch between windows, iterate through different windows opened by the webdriver, handle pop ups and frames in windows. 

GetWindowHandle Command

Purpose: To get the window handle of the current window.

driver.getWindowHandle(); Returns an alphanumeric string

GetWindowHandles Command

Purpose: To get the window handle of all the current windows.

Set<String> handle=Driver.getWindowHandles(); Returns a set of window handles

SwitchTo Window Command

Purpose: WebDriver supports moving between named windows using the “switchTo” method.

For(String handle:driver.getWindowHandles())

Driver.switchto().window(handle);

Or

Driver.switchto().window(windowname);
<A href="newwindow.html" target="windowname">click here for a new window </A>

SwitchTo Frame Command

Purpose: WebDriver supports moving between frames using the “switchTo” method.

Driver.switchto().frame(“framename”);

Driver.switchto().frame(0);

Driver.switchto().frame(previously found element using driver);

All these are evaluated from the current frame. You can go to the sub frames from the current frame. You can go back to the default top frame using the driver.switchTo().defaultContent();

SwitchTo PopUp Command

Purpose: WebDriver supports moving between named PopUps using the “switchTo” method. After you’ve triggered an action that opens a popup, you can access the alert and it will return the currently open alert object. With this object you can now accept, dismiss, read its contents or even type into a prompt. This interface works equally well on alerts, confirms, and prompts.

Alert alert=driver.switchTo().alert();

Alert.getText();//gets the text of the alert box
Alert.accept();//clicks on the accept button

Alert.dismiss();//clicks on the cancel button

Alert.sendkeys("yes"); // sends keys strokes

Alert.authenticateusing(credentials);//Used for authentication like proxy server

Credentials credentials=new UserAndPassword("admin","password");

Example program:

 String parentWindowHandle = browser.getWindowHandle(); // save the current window handle.
      WebDriver popup = null;
      Iterator<String> windowIterator = browser.getWindowHandles();
      while(windowIterator.hasNext()) { 
        String windowHandle = windowIterator.next(); 
        popup = browser.switchTo().window(windowHandle);
        if (popup.getTitle().equals("Google") {
          break;
        }
      }
Finds a window pop up with title google.

popup.close() would close the pop up.