Browser-specific workarounds in Selenium Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the correct Selenium WebDriver for Chrome.

Selenium Python

from selenium import webdriver

browser = webdriver.[1]()

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

AEdge

BFirefox

CSafari

DChrome

Attempts:

3 left

💡 Hint

Common Mistakes

Using Firefox or Safari WebDriver when Chrome is needed.

Misspelling the WebDriver class name.

The correct WebDriver class to launch Chrome browser is Chrome.

2fill in blank

medium

Complete the code to set a Chrome option to disable notifications.

Selenium Python

from selenium import webdriver
from selenium.webdriver.chrome.options import Options

options = Options()
options.add_argument('[1]')
browser = webdriver.Chrome(options=options)

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

A--disable-notifications

B--enable-notifications

C--start-maximized

D--headless

Attempts:

3 left

💡 Hint

Common Mistakes

Using --enable-notifications which enables notifications.

Using unrelated options like --headless.

To disable browser notifications in Chrome, use the argument --disable-notifications.

3fill in blank

hard

Fix the error in the code to correctly switch to a new browser window.

Selenium Python

original_window = browser.current_window_handle
browser.find_element('link text', 'Open new window').click()
browser.[1](original_window)

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

Aswitch_to.frame

Bswitch_to.window

Cswitch_to.alert

Dswitch_to.default_content

Attempts:

3 left

💡 Hint

Common Mistakes

Using switch_to.frame which is for frames, not windows.

Using switch_to.alert which is for alerts.

To switch between browser windows, use switch_to.window() method.

4fill in blank

hard

Fill both blanks to create a workaround for a Firefox bug by setting a preference and launching Firefox with options.

Selenium Python

from selenium.webdriver.firefox.options import Options
options = Options()
options.set_preference('[1]', False)
options.[2] = True
browser = webdriver.Firefox(options=options)

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

Adom.webnotifications.enabled

Bheadless

Cservice_log_path

Ddisable_notifications

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect preference names like disable_notifications.

Confusing service_log_path with options.

To disable web notifications in Firefox, set the preference dom.webnotifications.enabled to False. To run Firefox without opening a window, use headless=True.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that filters browser logs by level and formats messages.

Selenium Python

logs = {entry['timestamp']: entry['message'] for entry in browser.get_log('[1]') if entry['level'] == '[2]' and '[3]' in entry['message']}

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

Abrowser

BSEVERE

Cerror

Dperformance

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'performance' instead of 'browser' for log type.

Filtering by wrong log level or message content.

To get browser logs, use browser as the log type. Filter logs with level SEVERE and messages containing the word error.

Practice

1. Why do we need browser-specific workarounds in Selenium tests?

easy

A. Because different browsers may behave differently and need special handling

B. Because Selenium only supports one browser at a time

C. Because browsers do not support JavaScript

D. Because tests run faster on some browsers

Solution

1. Step 1: Understand browser differences

   Browsers like Chrome, Firefox, and Edge can behave differently in how they handle web elements or JavaScript.

2. Step 2: Recognize need for workarounds

   To keep tests reliable, we write special code for each browser to handle these differences.

3. Final Answer:

   Because different browsers may behave differently and need special handling -> Option A

4. Quick Check:

   Browser differences = need workarounds [OK]

Hint: Remember: Different browsers act differently, so adjust tests [OK]

Common Mistakes:

• Thinking Selenium supports only one browser at a time
• Believing all browsers behave exactly the same
• Assuming JavaScript is unsupported in browsers

2. Which is the correct way to detect the browser name in Selenium Python?

easy

A. driver.get_browser_name()

B. driver.getCapabilities('browser')

C. driver.browserName

D. driver.capabilities['browserName']

Solution

1. Step 1: Recall Selenium's capability dictionary

   Selenium stores browser info in driver.capabilities, a dictionary with keys like 'browserName'.

2. Step 2: Identify correct syntax

   Accessing driver.capabilities['browserName'] returns the browser name string correctly.

3. Final Answer:

   driver.capabilities['browserName'] -> Option D

4. Quick Check:

   Use capabilities dictionary for browser name [OK]

Hint: Use driver.capabilities['browserName'] to get browser name [OK]

Common Mistakes:

• Using non-existent methods like get_browser_name()
• Trying to access driver.browserName directly
• Using wrong method names or parameters

3. What will the following code print if the browser is Firefox?

browser = driver.capabilities['browserName']
if browser == 'firefox':
    print('Use Firefox workaround')
else:
    print('Use default code')

medium

A. Use default code

B. Use Firefox workaround

C. KeyError

D. SyntaxError

Solution

1. Step 1: Check browser value

   The variable browser is assigned driver.capabilities['browserName'], which is 'firefox' here.

2. Step 2: Evaluate if condition

   Since browser == 'firefox' is True, the code prints 'Use Firefox workaround'.

3. Final Answer:

   Use Firefox workaround -> Option B

4. Quick Check:

   Browser is 'firefox' so prints Firefox workaround [OK]

Hint: Match browserName string exactly to choose workaround [OK]

Common Mistakes:

• Assuming else branch runs for Firefox
• Confusing case sensitivity in browser name
• Expecting errors when key exists

4. Identify the error in this Selenium Python snippet for browser-specific workaround:

browser = driver.capabilities.browserName
if browser == 'chrome':
    print('Chrome workaround')

medium

A. driver.capabilities is a dictionary, so .browserName is invalid

B. Missing colon after if statement

C. Print statement syntax is wrong

D. No error, code is correct

Solution

1. Step 1: Check how capabilities is accessed

   driver.capabilities is a dictionary, so keys must be accessed with ['key'], not dot notation.

2. Step 2: Identify the error

   Using driver.capabilities.browserName causes an AttributeError because 'dict' has no attribute 'browserName'.

3. Final Answer:

   driver.capabilities is a dictionary, so .browserName is invalid -> Option A

4. Quick Check:

   Use ['browserName'] not .browserName [OK]

Hint: Access capabilities keys with brackets, not dot notation [OK]

Common Mistakes:

• Using dot notation on dictionary objects
• Ignoring Python syntax for dictionary access
• Assuming no error in attribute access

5. You want to run a Selenium test that clicks a button differently on Chrome and Firefox due to a known issue. Which code snippet correctly implements this workaround?

hard

A. driver.find_element(By.ID, 'btn').click() # Works on all browsers without changes

B. if driver.capabilities['browserName'] == 'chrome':
driver.execute_script("arguments[0].click();", driver.find_element(By.ID, 'btn'))
else:
driver.find_element(By.ID, 'btn').click()

C. browser = driver.capabilities['browserName']
if browser == 'chrome':
driver.find_element(By.ID, 'btn').click()
elif browser == 'firefox':
driver.execute_script("arguments[0].click();", driver.find_element(By.ID, 'btn'))

D. browser = driver.capabilities.browserName
if browser == 'firefox':
driver.find_element(By.ID, 'btn').click()
else:
driver.execute_script("arguments[0].click();", driver.find_element(By.ID, 'btn'))

Solution

1. Step 1: Detect browser correctly

   Use driver.capabilities['browserName'] to get the browser name safely.

2. Step 2: Apply browser-specific click

   For Chrome, use normal click(). For Firefox, use JavaScript click workaround to avoid issues.

3. Final Answer:

   Use if-elif with correct browser detection and click methods -> Option C

4. Quick Check:

   Detect browser then apply specific click method [OK]

Hint: Detect browser, then choose click method accordingly [OK]

Common Mistakes:

• Using dot notation on capabilities dictionary
• Applying wrong click method for browser
• Assuming one click method fits all browsers