Handling multiple pages in Selenium Python - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of handling multiple pages in Selenium?

To switch control between different browser windows or tabs during automated testing, allowing interaction with elements on each page.

beginner

How do you get all open window handles in Selenium with Python?

Use driver.window_handles which returns a list of all window handles (unique IDs) for open browser windows or tabs.

beginner

Explain how to switch to a new window or tab in Selenium Python.

Use driver.switch_to.window(window_handle) where window_handle is the ID of the target window or tab.

intermediate

Why is it important to switch back to the original window after working on a new tab?

Because Selenium commands act on the current window. Switching back ensures further actions happen on the correct page.

beginner

What is a common real-life example of handling multiple pages in web testing?

Testing a login flow where clicking a link opens a new tab for authentication, then returning to the main page to verify login success.

Which Selenium method returns all open window handles?

A driver.window_handles

B driver.get_window()

C driver.switch_to.window()

D driver.current_window

driver.window_handles returns a list of all open window handles.

How do you switch control to a new browser tab in Selenium Python?

A driver.open_tab(new_handle)

B driver.switch_to.window(new_handle)

C driver.get(new_handle)

D driver.change_tab(new_handle)

Use driver.switch_to.window(window_handle) to switch control to the desired tab.

What happens if you try to interact with a page element without switching to its window?

A The element is found automatically

B Nothing happens, test passes

C The browser closes

D Selenium throws an error because it controls the wrong window

Selenium commands act on the current window. If you don't switch, it can't find elements on other windows.

Which of these is NOT a good practice when handling multiple pages?

A Ignoring window handles and continuing blindly

B Closing windows you no longer need

C Storing window handles for later use

D Switching back to the original window after work

Ignoring window handles can cause Selenium to act on the wrong window, leading to test failures.

What type of data structure is returned by driver.window_handles?

A String

B Dictionary

C List

D Integer

driver.window_handles returns a list of window handle strings.

Describe the steps to handle multiple pages in Selenium Python during a test.

Think about how you move between browser tabs manually.

Why is switching windows important in automated browser testing?

Imagine trying to talk to a friend in a different room without moving there.

Practice

1. What does driver.window_handles return in Selenium?

easy

A. The URL of the current page

B. The current active window handle only

C. The title of the current page

D. A list of all open browser window handles

Solution

1. Step 1: Understand what window handles represent

   Window handles are unique IDs for each open browser window or tab.

2. Step 2: Identify what driver.window_handles returns

   This property returns a list of all window handles currently opened by the driver.

3. Final Answer:

   A list of all open browser window handles -> Option D

4. Quick Check:

   window_handles = list of all windows [OK]

Hint: Remember: window_handles lists all open pages [OK]

Common Mistakes:

• Confusing window_handles with current window handle
• Expecting window_handles to return page titles or URLs
• Using window_handles as a single string instead of a list

2. Which is the correct syntax to switch to a new browser tab in Selenium Python?

easy

A. driver.switch_to_tab(driver.window_handles[1])

B. driver.switch_window(driver.window_handles[1])

C. driver.switch_to.window(driver.window_handles[1])

D. driver.change_window(driver.window_handles[1])

Solution

1. Step 1: Recall the correct method to switch windows

   The Selenium method to switch windows is driver.switch_to.window().

2. Step 2: Check the syntax for switching to the second tab

   Use the second handle in the list: driver.window_handles[1].

3. Final Answer:

   driver.switch_to.window(driver.window_handles[1]) -> Option C

4. Quick Check:

   Use switch_to.window with window_handles index [OK]

Hint: Use switch_to.window() with window_handles index [OK]

Common Mistakes:

• Using non-existent methods like switch_window or switch_to_tab
• Forgetting to use driver.switch_to
• Using wrong index for window_handles

3. What will the following code print if two tabs are open and the first tab's title is 'Home' and second tab's title is 'About'?

main_window = driver.current_window_handle
all_windows = driver.window_handles
for window in all_windows:
    driver.switch_to.window(window)
    print(driver.title)

medium

A. ["Home", "About"]

B. ["About", "Home"]

C. Only "Home"

D. Only "About"

Solution

1. Step 1: Understand the loop over all window handles

   The code loops over all open windows and switches to each one in order.

2. Step 2: Print the title of each window after switching

   It prints the title of each tab in the order of window_handles list, which is usually the order tabs opened.

3. Final Answer:

   ["Home", "About"] -> Option A

4. Quick Check:

   Loop prints titles of all tabs in order [OK]

Hint: Loop over window_handles prints all tab titles [OK]

Common Mistakes:

• Assuming only current tab title prints
• Mixing order of window handles
• Not switching before printing title

4. Identify the error in this code snippet that tries to switch back to the main window after opening a new tab:

main_window = driver.current_window_handle
# code to open new tab
driver.switch_to.window(driver.window_handles[1])
# do something
# switch back
driver.switch_to.window(main_window())

medium

A. Missing import for switch_to

B. main_window is called like a function with parentheses

C. driver.window_handles[1] is invalid index

D. No error, code is correct

Solution

1. Step 1: Check how main_window is used

   main_window is a string handle, but code calls main_window() as a function, which is incorrect.

2. Step 2: Identify correct usage to switch back

   Should use driver.switch_to.window(main_window) without parentheses.

3. Final Answer:

   main_window is called like a function with parentheses -> Option B

4. Quick Check:

   Window handle is a string, not a function [OK]

Hint: Window handles are strings, don't add () [OK]

Common Mistakes:

• Calling window handle variables as functions
• Using wrong index for window_handles
• Assuming switch_to needs import

5. You open multiple tabs during a test. How do you ensure you always return to the original tab after closing the new ones?

hard

A. Save the original window handle before opening new tabs and switch back using it

B. Use driver.close() on all tabs except the last one

C. Call driver.quit() to close all tabs and restart the browser

D. Switch to the last window handle in driver.window_handles list

Solution

1. Step 1: Save the original window handle before opening new tabs

   This allows you to remember which tab was the main one.

2. Step 2: After closing new tabs, switch back to the saved original handle

   Use driver.switch_to.window(original_handle) to return safely.

3. Final Answer:

   Save the original window handle before opening new tabs and switch back using it -> Option A

4. Quick Check:

   Save and reuse original handle to return [OK]

Hint: Always save main window handle before opening tabs [OK]

Common Mistakes:

• Assuming last window handle is original
• Closing tabs without switching back
• Using driver.quit() which ends session