Window handles in Selenium Python - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

What is the output of this Selenium Python code snippet?

Consider the following Selenium Python code that opens a new tab and switches to it. What will be the value of current_handle after execution?

Selenium Python

from selenium import webdriver
from selenium.webdriver.common.by import By
import time

browser = webdriver.Chrome()
browser.get('https://example.com')
original_handle = browser.current_window_handle
browser.execute_script("window.open('https://example.org', '_blank');")
time.sleep(1)
handles = browser.window_handles
for handle in handles:
    if handle != original_handle:
        browser.switch_to.window(handle)
        break
current_handle = browser.current_window_handle
print(current_handle == original_handle)
browser.quit()

A False

B Raises NoSuchWindowException

C True

D None

💡 Hint

Think about which window handle is active after switching.

The code opens a new tab and switches to it. The current_handle will be the new tab's handle, which is different from original_handle. So the comparison returns False.

❓ assertion

intermediate

Which assertion correctly verifies switching back to the original window?

You have stored the original window handle in original_handle. After opening and switching to a new window, which assertion correctly confirms you switched back to the original window?

A assert browser.current_window_handle == original_handle

B assert browser.current_window_handle != original_handle

C assert browser.window_handles[0] == original_handle

D assert browser.current_url == original_handle

💡 Hint

Check the current window handle after switching back.

The current_window_handle property gives the active window's handle. To confirm switching back, it must equal the original handle.

❓ locator

advanced

Which locator strategy is best to find a link that opens a new window?

You want to find a link that opens a new window when clicked. The link has the text 'Open New Window'. Which locator is best to find this link in Selenium?

A browser.find_element(By.ID, 'open-new-window')

B browser.find_element(By.CLASS_NAME, 'new-window-link')

C browser.find_element(By.LINK_TEXT, 'Open New Window')

D browser.find_element(By.CSS_SELECTOR, 'a[target="_blank"]')

💡 Hint

The link text is unique and exact.

Using LINK_TEXT with the exact visible text is the most direct and reliable way to find the link by its text.

🔧 Debug

advanced

Why does this Selenium code raise an error when switching windows?

This code snippet raises a NoSuchWindowException. What is the cause?

Selenium Python

browser = webdriver.Chrome()
browser.get('https://example.com')
original_handle = browser.current_window_handle
browser.switch_to.window('non_existent_handle')

A The browser has not loaded the page yet

B The handle 'non_existent_handle' does not exist in browser.window_handles

C The driver is not initialized properly

D The switch_to method is deprecated

💡 Hint

Check if the handle you switch to is valid.

Switching to a window handle that is not in the list of open windows causes NoSuchWindowException.

❓ framework

expert

In a test framework, how to ensure cleanup of all windows after test?

You write tests that open multiple windows. Which approach best ensures all windows are closed after each test to avoid side effects?

A Do nothing; windows close automatically after test ends

B Only call browser.quit() at the end of all tests

C Close only the current window in teardown, leave others open

D In a teardown method, iterate over browser.window_handles and close each, then quit the browser

💡 Hint

Think about cleaning all opened windows to avoid test interference.

Closing all windows explicitly in teardown prevents leftover windows affecting other tests and ensures clean state.