Screenshot on failure in Selenium Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to take a screenshot when the test fails.

Selenium Python

try:
    assert driver.title == "Home Page"
except AssertionError:
    driver.[1]("failure.png")

Drag options to blanks, or click blank then click option'

Acapture_screenshot

Btake_screenshot

Cget_screenshot_as_file

Dsave_screenshot

Attempts:

3 left

💡 Hint

Common Mistakes

Using a method name that does not exist in Selenium WebDriver.

Forgetting to call the method on the driver object.

The get_screenshot_as_file method saves a screenshot to a file.

2fill in blank

medium

Complete the code to catch any exception and save a screenshot.

Selenium Python

try:
    element = driver.find_element(By.ID, "submit")
    element.click()
except [1]:
    driver.get_screenshot_as_file("error.png")

Drag options to blanks, or click blank then click option'

AException

BValueError

CKeyError

DTimeoutError

Attempts:

3 left

💡 Hint

Common Mistakes

Catching only specific exceptions and missing others.

Using exception classes unrelated to Selenium errors.

Using Exception catches all exceptions, ensuring the screenshot is taken on any failure.

3fill in blank

hard

Fix the error in the code to correctly save a screenshot on failure.

Selenium Python

try:
    assert "Welcome" in driver.page_source
except AssertionError:
    driver.[1]("fail.png")

Drag options to blanks, or click blank then click option'

AsaveScreenshot

BcaptureScreenshot

Cscreenshot_save

Dget_screenshot_as_file

Attempts:

3 left

💡 Hint

Common Mistakes

Using camelCase method names which do not exist.

Misspelling the method name.

The correct method to save a screenshot file is get_screenshot_as_file.

4fill in blank

hard

Fill both blanks to save a screenshot with a dynamic filename including the test name.

Selenium Python

def test_login(driver):
    try:
        assert driver.current_url == "https://example.com/dashboard"
    except AssertionError:
        filename = f"[1]_failure.png"
        driver.[2](filename)

Drag options to blanks, or click blank then click option'

Atest_login

Bsave_screenshot

Cget_screenshot_as_file

Dfailure

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect method names for saving screenshots.

Not using the test name in the filename.

The filename uses the test function name test_login. The method to save the screenshot is get_screenshot_as_file.

5fill in blank

hard

Fill all three blanks to implement a pytest fixture that takes a screenshot on test failure.

Selenium Python

import pytest

@pytest.fixture(autouse=True)
def screenshot_on_failure(request, driver):
    yield
    if request.node.rep_call.[1]:
        driver.[2](f"[3].png")

Drag options to blanks, or click blank then click option'

Afailed

Bget_screenshot_as_file

Crequest.node.name

Dpassed

Attempts:

3 left

💡 Hint

Common Mistakes

Checking for 'passed' instead of 'failed'.

Using wrong method names for screenshot saving.

Not using the test name for the screenshot filename.

The fixture checks if the test failed. It saves a screenshot using get_screenshot_as_file with the test name from request.node.name.

Practice

1. What is the main purpose of taking a screenshot on test failure in Selenium?

easy

A. To capture the current state of the web page for debugging

B. To speed up the test execution

C. To improve the browser's performance

D. To automatically fix the test errors

Solution

1. Step 1: Understand the role of screenshots in testing

   Screenshots help testers see what the user saw when the test failed.

2. Step 2: Identify the purpose of capturing screenshots on failure

   They provide visual evidence to debug UI problems quickly.

3. Final Answer:

   To capture the current state of the web page for debugging -> Option A

4. Quick Check:

   Screenshot on failure = capture page state [OK]

Hint: Screenshots show what failed looks like visually [OK]

Common Mistakes:

• Thinking screenshots speed up tests
• Believing screenshots fix errors automatically
• Confusing screenshots with performance tools

2. Which of the following is the correct syntax to take a screenshot in Selenium Python when a test fails?

easy

A. driver.save_screenshot('error.png')

B. driver.takeScreenshot('error.png')

C. driver.capture('error.png')

D. driver.screenshotSave('error.png')

Solution

1. Step 1: Recall Selenium Python screenshot method

   The correct method to save a screenshot is save_screenshot().

2. Step 2: Verify method names and syntax

   Only driver.save_screenshot('error.png') matches Selenium's API.

3. Final Answer:

   driver.save_screenshot('error.png') -> Option A

4. Quick Check:

   Correct method name = save_screenshot [OK]

Hint: Remember method is save_screenshot with underscore [OK]

Common Mistakes:

• Using camelCase instead of snake_case
• Using non-existent methods like capture or screenshotSave
• Missing parentheses or quotes

3. What will be the output if the following Selenium Python code runs and the element is not found?

try:
    driver.find_element(By.ID, 'submit').click()
except Exception as e:
    driver.save_screenshot('fail.png')
    print('Screenshot saved on failure')

medium

A. No output, test passes silently

B. RuntimeError without screenshot

C. SyntaxError due to missing import

D. Screenshot saved on failure

Solution

1. Step 1: Analyze try-except behavior on element not found

   If element is missing, exception triggers except block.

2. Step 2: Check actions in except block

   Screenshot is saved and message printed: 'Screenshot saved on failure'.

3. Final Answer:

   Screenshot saved on failure -> Option D

4. Quick Check:

   Exception triggers screenshot and print [OK]

Hint: Exception triggers except block actions [OK]

Common Mistakes:

• Assuming test passes silently on failure
• Confusing syntax errors with runtime exceptions
• Ignoring the print statement inside except

4. Identify the error in this Selenium Python snippet intended to save a screenshot on failure:

try:
    driver.find_element(By.NAME, 'login').click()
except:
    driver.save_screenshot(failure.png)

medium

A. No error, code is correct

B. Incorrect exception handling syntax

C. Missing quotes around filename in save_screenshot

D. Wrong method name saveScreenshot instead of save_screenshot

Solution

1. Step 1: Check save_screenshot argument syntax

   Filename must be a string in quotes, but here it is unquoted.

2. Step 2: Confirm exception handling and method name

   Except syntax and method name are correct; only filename is wrong.

3. Final Answer:

   Missing quotes around filename in save_screenshot -> Option C

4. Quick Check:

   Filename must be a string in quotes [OK]

Hint: Always put filename in quotes for save_screenshot [OK]

Common Mistakes:

• Forgetting quotes around filename string
• Changing method name incorrectly
• Misusing except syntax

5. You want to automatically take a screenshot only when a Selenium test fails and save it with a timestamp. Which approach below correctly implements this in Python?

hard

A. Use driver.save_screenshot('fail.png') outside try-except block

B. Use try-except around test steps, call driver.save_screenshot(f"fail_{time.time()}.png") in except

C. Call driver.save_screenshot() before every test step unconditionally

D. Use a loop to retry test steps and save screenshot on success

Solution

1. Step 1: Understand when to take screenshots

   Screenshots should be taken only on failure, inside except block.

2. Step 2: Use timestamp for unique filenames

   Using time.time() in filename ensures unique screenshot names.

3. Final Answer:

   Use try-except around test steps, call driver.save_screenshot(f"fail_{time.time()}.png") in except -> Option B

4. Quick Check:

   Screenshot on failure with timestamp = try-except + formatted filename [OK]

Hint: Take screenshots only in except block with timestamped names [OK]

Common Mistakes:

• Taking screenshots before test steps always
• Saving screenshots outside exception handling
• Retrying tests without capturing failure screenshots