Handling NoSuchWindowException Failure in Selenium

Error Name:

NoSuchWindowException

Description: 

NoSuchWindowException is a runtime exception that occurs when the Selenium WebDriver tries to interact with a window that no longer exists or has been closed. It is a common error that is typically encountered when working with multiple windows or tabs in a Selenium test.

Understanding the error: When working with multiple windows, WebDriver creates a unique identifier for each window, called a window handle. The window handles can be used to switch between windows or perform actions on a specific window. NoSuchWindowException occurs when the WebDriver tries to interact with a window using a handle that no longer exists, usually because it has been closed.

Causes:

Window was closed: This error can occur if the window that the WebDriver is trying to interact with has been closed.

Misspelled or incorrect window handle: This error can occur if the window handle is misspelled or incorrect.

Debugs:

Debug-1: 

Check line number and file name where the error occurred to identify which window handle is causing the error.

Debug-2: 

Use the getWindowHandles() method to get the handles of all currently open windows. This will return a set of strings, each representing a window handle. You can then use the switchTo().window() method to switch to a specific window based on its handle. If the window handle you are trying to switch to is not present in the set returned by getWindowHandles(), it means the window no longer exists.

Debug-3: 

Use a try-catch block to catch the NoSuchWindowException and handle it accordingly. For example, you can close the current window and switch back to the previous window.

Debug-4: 

Add an implicit wait before switching to a window to ensure that the window is fully loaded and available for interaction. This can help avoid the NoSuchWindowException error caused by the window not being available yet.