Handling pop-up windows in Selenium Python - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

What is the output of this Selenium code snippet?

Consider the following Selenium Python code that handles a simple alert pop-up. What will be printed after execution?

Selenium Python

from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.common.alert import Alert

# Assume driver is already initialized and navigated to page
alert_button = driver.find_element(By.ID, 'alertBtn')
alert_button.click()
alert = Alert(driver)
alert_text = alert.text
alert.accept()
print(alert_text)

A No output, code raises NoAlertPresentException

B Code raises ElementNotInteractableException

C Empty string printed

D The text message shown in the alert pop-up

💡 Hint

Remember that Alert(driver) switches context to the alert pop-up and .text reads its message.

The Alert object allows reading the alert's text before accepting it. The code prints the alert's message.

❓ assertion

intermediate

Which assertion correctly verifies a confirmation pop-up was accepted?

After clicking a button that triggers a confirmation pop-up, you accept it. Which assertion correctly checks that the pop-up was accepted by verifying the page text?

Selenium Python

from selenium.webdriver.common.by import By

# After accepting confirmation pop-up
result_text = driver.find_element(By.ID, 'result').text

A assert 'Error' in result_text

B assert result_text == 'Cancelled'

C assert 'Confirmed' in result_text

D assert result_text == ''

💡 Hint

Accepting confirmation usually changes page text to indicate confirmation.

The page updates to show 'Confirmed' after accepting the pop-up, so the assertion checks for that text.

❓ locator

advanced

Which locator is best to find a button that opens a new browser window?

You want to locate a button that opens a new window. The button has a unique aria-label 'Open new window'. Which locator is best practice?

A driver.find_element(By.ID, 'openWindowBtn')

B driver.find_element(By.CSS_SELECTOR, 'button[aria-label="Open new window"]')

C driver.find_element(By.CLASS_NAME, 'btn-open')

D driver.find_element(By.XPATH, '//button[text()="Open new window"]')

💡 Hint

Use semantic attributes for accessibility and uniqueness.

Using aria-label with CSS selector is reliable and accessible for locating the button.

🔧 Debug

advanced

Why does this Selenium code fail to switch to the new window?

This code clicks a button to open a new window, then tries to switch to it. Why does it fail?

Selenium Python

original_window = driver.current_window_handle
button = driver.find_element(By.ID, 'openWindowBtn')
button.click()
# Attempt to switch
for handle in driver.window_handles:
    if handle != original_window:
        driver.switch_to.window(handle)
        break
print(driver.title)

A The new window is not fully opened before switching; need to wait

B The loop incorrectly switches back to original window

C driver.window_handles is empty after click

D driver.switch_to.window() requires window name, not handle

💡 Hint

New windows may take time to open; immediate switch can fail.

Without waiting, the new window handle may not appear yet, causing switch to fail.

❓ framework

expert

Which test framework feature best handles flaky pop-up alerts in Selenium tests?

Pop-up alerts sometimes appear with delay causing test failures. Which framework feature best handles this to make tests stable?

A Use explicit waits to wait for alert presence before interacting

B Use implicit waits globally to wait for all elements including alerts

C Wrap alert handling code in try-except without waits

D Disable pop-ups in browser settings to avoid alerts

💡 Hint

Waiting specifically for alerts is more reliable than global waits.

Explicit waits for alert presence ensure code interacts only when alert is ready, reducing flakiness.