Window size control in Selenium Python - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

What is the window size after resizing?

Given the following Selenium Python code snippet, what will be the window size after execution?

Selenium Python

from selenium import webdriver

options = webdriver.ChromeOptions()
driver = webdriver.Chrome(options=options)
driver.set_window_size(800, 600)
size = driver.get_window_size()
print(size)
driver.quit()

A {'width': 800, 'height': 600}

B {'width': 1024, 'height': 768}

C {'width': 0, 'height': 0}

D Raises an exception

💡 Hint

The set_window_size method sets the browser window to the specified width and height.

The code sets the window size to 800 pixels wide and 600 pixels tall, then retrieves the size. So the output is a dictionary with width 800 and height 600.

❓ assertion

intermediate

Which assertion correctly verifies window size?

You want to assert that the browser window width is exactly 1024 pixels after resizing. Which assertion is correct?

Selenium Python

driver.set_window_size(1024, 768)
size = driver.get_window_size()

A assert size.width == 1024

B assert size['width'] == 1024

C assert size.get('height') == 1024

D assert size['width'] > 1024

💡 Hint

get_window_size returns a dictionary with keys 'width' and 'height'.

The size variable is a dictionary, so you must use size['width'] to access the width. Option B correctly asserts width equals 1024.

🔧 Debug

advanced

Why does this window resize code fail?

This Selenium Python code throws an error. What is the cause?

Selenium Python

driver = webdriver.Chrome()
driver.set_window_size(800)
size = driver.get_window_size()

A webdriver.Chrome() must be called with options argument

B driver.get_window_size() is deprecated and causes error

C set_window_size requires two arguments: width and height

D set_window_size only accepts string arguments

💡 Hint

Check the method signature for set_window_size.

set_window_size requires two integer arguments: width and height. Passing only one argument causes a TypeError.

🧠 Conceptual

advanced

What happens if you maximize window before setting size?

In Selenium Python, if you call driver.maximize_window() before driver.set_window_size(800, 600), what will be the final window size?

A The window size will be 800x600 as set by set_window_size

B The window size will be the default browser size

C The window remains maximized ignoring set_window_size

D An error is raised because maximize_window conflicts with set_window_size

💡 Hint

Later commands override earlier ones.

Calling set_window_size after maximize_window resizes the window to the specified size, overriding maximization.

❓ framework

expert

How to reliably test window resizing in Selenium tests?

You want to write a Selenium test that verifies your web app layout changes correctly when the window is resized. Which approach is best?

A Use driver.get_window_size() only without resizing

B Use driver.maximize_window() and assume layout adapts automatically

C Manually resize the browser window during test execution

D Use driver.set_window_size() to resize, then assert layout changes using element properties

💡 Hint

Automate resizing and verify layout programmatically.

To test layout changes on resize, you must programmatically resize the window and then check element properties or styles to confirm layout adapts.