Switching between windows in Selenium Python - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of switching between windows in Selenium?

Switching between windows allows the test to control and interact with multiple browser windows or tabs opened during a test session.

beginner

How do you get the current window handle in Selenium Python?

Use driver.current_window_handle to get the unique identifier of the current browser window.

intermediate

How can you switch to a new window in Selenium Python?

You can loop through driver.window_handles and switch to a window handle different from the current one using driver.switch_to.window(handle).

intermediate

What happens if you try to interact with an element in a window you have not switched to?

Selenium will throw a NoSuchElementException or similar error because it only interacts with the currently focused window.

beginner

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

Switching back ensures your test continues in the correct window context and avoids errors when interacting with elements in the original window.

Which Selenium method switches control to a different browser window?

A driver.switch_to.window(handle)

B driver.get_window(handle)

C driver.change_window(handle)

D driver.open_window(handle)

The correct method to switch control to another window is driver.switch_to.window(handle).

What does driver.window_handles return?

A The title of the current window

B The current window handle

C A list of all open window handles

D The URL of the current window

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

If you want to switch back to the original window, what should you do?

A Use <code>driver.switch_to.window(original_handle)</code>

B Close the current window

C Use <code>driver.refresh()</code>

D Open a new window

You switch back by calling driver.switch_to.window(original_handle) where original_handle is the saved handle of the first window.

What exception might occur if you try to interact with elements in a window you haven't switched to?

A TimeoutException

B NoSuchElementException

C ValueError

D IndexError

Trying to interact with elements in a non-focused window usually causes a NoSuchElementException.

Why is it useful to store the original window handle before switching?

A To open a new tab

B To close the original window automatically

C To refresh the original window

D To switch back easily after working with other windows

Storing the original window handle lets you switch back to it later without confusion.

Explain the steps to switch from the original browser window to a newly opened window using Selenium Python.

Think about how you identify and switch to a different window.

Why must you switch back to the original window after finishing actions on a new window in Selenium tests?

Consider what happens if Selenium tries to find elements in the wrong window.

Practice

1. What does driver.switch_to.window(window_handle) do in Selenium?

easy

A. It closes the current browser window.

B. It changes control to the browser window identified by window_handle.

C. It refreshes the current browser window.

D. It opens a new browser window.

Solution

1. Step 1: Understand the method purpose

   driver.switch_to.window() is used to change Selenium's focus to a different browser window or tab.

2. Step 2: Identify the parameter role

   The parameter window_handle specifies which window Selenium should control next.

3. Final Answer:

   It changes control to the browser window identified by window_handle. -> Option B

4. Quick Check:

   Switching windows = change control [OK]

Hint: Switch windows by passing the window handle to switch_to.window() [OK]

Common Mistakes:

• Thinking it closes or refreshes windows
• Confusing switching with opening new windows
• Not passing a valid window handle

2. Which of the following is the correct syntax to switch to a new window stored in variable new_window?

easy

A. driver.window_switch(new_window)

B. driver.switch_window(new_window)

C. driver.switchTo().window(new_window)

D. driver.switch_to.window(new_window)

Solution

1. Step 1: Recall correct Selenium Python syntax

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

2. Step 2: Match the syntax with the options

   driver.switch_to.window(new_window) uses the correct method and parameter. Other options use incorrect method names or Java syntax.

3. Final Answer:

   driver.switch_to.window(new_window) -> Option D

4. Quick Check:

   Python Selenium uses switch_to.window() [OK]

Hint: Use driver.switch_to.window(handle) exactly in Python [OK]

Common Mistakes:

• Using Java syntax like switchTo()
• Using incorrect method names
• Missing the switch_to part

3. What will be the output of the following code snippet?

original = driver.current_window_handle
all_windows = driver.window_handles
for w in all_windows:
    if w != original:
        driver.switch_to.window(w)
        print(driver.title)
        break
print(driver.current_window_handle == original)

medium

A. Prints the title of the new window and then prints False

B. Prints the title of the original window and then prints True

C. Throws an error because of wrong window handle usage

D. Prints False twice

Solution

1. Step 1: Understand window handles and switching

   The code saves the original window handle, loops through all windows, and switches to the first window that is not original.

2. Step 2: Analyze the print statements

   Inside the loop, it prints the title of the new window and breaks. After the loop, it compares current window handle with original, which will be False because we switched.

3. Final Answer:

   Prints the title of the new window and then prints False -> Option A

4. Quick Check:

   Switched window title + current handle != original = False [OK]

Hint: Switch changes current handle, so comparison with original is False [OK]

Common Mistakes:

• Assuming current window handle is still original after switch
• Confusing window_handles list with current_window_handle
• Expecting True after switching

4. Identify the error in this code snippet that tries to switch back to the original window:

original = driver.current_window_handle
# code opens new window
new_window = driver.window_handles[1]
driver.switch_to.window(new_window)
# some actions
# switch back
switch_to.window(original)

medium

A. Cannot switch back once switched

B. Using wrong index for new_window

C. Missing 'driver.' before switch_to.window in last line

D. No error, code is correct

Solution

1. Step 1: Check the last line syntax

   The last line calls switch_to.window(original) without the driver. prefix, which causes a NameError.

2. Step 2: Confirm other parts are correct

   Index 1 is valid if two windows exist, switching back is allowed, so no other errors.

3. Final Answer:

   Missing 'driver.' before switch_to.window in last line -> Option C

4. Quick Check:

   Always prefix with driver.switch_to.window() [OK]

Hint: Always use driver.switch_to.window() fully [OK]

Common Mistakes:

• Forgetting 'driver.' before switch_to
• Assuming switch back is automatic
• Using wrong window handle index without checking

5. You have opened multiple tabs during a test. How do you switch back to the original tab after performing actions on others?

hard

A. Store the original window handle before switching, then use driver.switch_to.window(original_handle) to return.

B. Call driver.close() on all other tabs to return automatically.

C. Use driver.switch_to.default_window() to go back to the first tab.

D. Restart the browser to return to the original tab.

Solution

1. Step 1: Save the original window handle

   Before switching tabs, save the current window handle in a variable.

2. Step 2: Switch back using saved handle

   Use driver.switch_to.window(original_handle) to return control to the original tab.

3. Step 3: Evaluate other options

   Closing tabs or restarting browser is inefficient; default_window() does not exist in Selenium Python.

4. Final Answer:

   Store the original window handle before switching, then use driver.switch_to.window(original_handle) to return. -> Option A

5. Quick Check:

   Save handle, then switch back using it [OK]

Hint: Always save original handle to switch back later [OK]

Common Mistakes:

• Trying to use non-existent default_window() method
• Closing tabs instead of switching
• Restarting browser unnecessarily