Selenium vs Cypress vs Playwright comparison in Selenium Python - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to open a browser using Selenium WebDriver.

Selenium Python

from selenium import webdriver

driver = webdriver.[1]()
driver.get('https://example.com')
driver.quit()

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

AFirefox

BSafari

CChrome

DEdge

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase browser names

Forgetting to import webdriver

Not calling the constructor with parentheses

The correct way to open a Chrome browser with Selenium is webdriver.Chrome().

2fill in blank

medium

Complete the code to find an element by its ID using Selenium.

Selenium Python

element = driver.find_element_by_[1]('submit-button')

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

Aid

Bname

Cclass_name

Dtag_name

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'name' instead of 'id'

Using 'class_name' when ID is needed

Misspelling the method name

To find an element by its ID, use find_element_by_id.

3fill in blank

hard

Fix the error in the assertion to check the page title with Selenium.

Selenium Python

assert driver.title [1] 'Example Domain'

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

A<

B==

C!=

D>

Attempts:

3 left

💡 Hint

Common Mistakes

Using '!=' which checks for inequality

Using comparison operators like '<' or '>' incorrectly

To verify the page title matches exactly, use the equality operator ==.

4fill in blank

hard

Fill both blanks to create a test that waits for an element to be clickable using Selenium's WebDriverWait.

Selenium Python

from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC

wait = WebDriverWait(driver, 10)
element = wait.until(EC.[1]((By.[2], 'submit-button')))

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

Aelement_to_be_clickable

Bpresence_of_element_located

CID

DCLASS_NAME

Attempts:

3 left

💡 Hint

Common Mistakes

Using presence_of_element_located which only checks presence

Using wrong locator types like CLASS_NAME when ID is needed

To wait until an element is clickable, use element_to_be_clickable with the locator type ID.

5fill in blank

hard

Fill both blanks to create a dictionary comprehension that maps test names to their pass status from a results dictionary.

Selenium Python

test_status = {test[1]: result for test, result in results.items() if result [2] True}

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

A.upper()

C==

D!=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '!=' instead of '==' in the condition

Modifying result values incorrectly

Not applying string method to test names

The comprehension converts test names to uppercase (.upper()), keeps results as is (empty string), and filters only passed tests (== True).

Practice

1. Which testing tool is known for supporting multiple programming languages including Python and JavaScript, and offers broad browser support?

easy

A. Cypress

B. Playwright

C. Selenium

D. JUnit

Solution

1. Step 1: Identify language support

   Selenium supports many languages like Python, Java, C#, etc., unlike Cypress which mainly supports JavaScript.

2. Step 2: Check browser support

   Selenium supports many browsers including Chrome, Firefox, Safari, Edge, and more, making it broad in browser support.

3. Final Answer:

   Selenium -> Option C

4. Quick Check:

   Multi-language + broad browsers = Selenium [OK]

Hint: Multi-language and broad browser support points to Selenium [OK]

Common Mistakes:

• Confusing Cypress as multi-language
• Thinking Playwright supports more languages than Selenium
• Choosing JUnit which is a Java testing framework

2. Which of the following is the correct way to start a Playwright browser session in Python?

easy

A. browser = playwright.chromium.launch()

B. browser = Playwright.start()

C. browser = playwright.startBrowser()

D. browser = Playwright.launchChromium()

Solution

1. Step 1: Recall Playwright Python syntax

   Playwright uses the syntax playwright.chromium.launch() to start a Chromium browser session.

2. Step 2: Check other options for correctness

   Options B, C, and D do not match the official Playwright Python API method names.

3. Final Answer:

   browser = playwright.chromium.launch() -> Option A

4. Quick Check:

   Correct Playwright launch syntax = browser = playwright.chromium.launch() [OK]

Hint: Playwright uses playwright.chromium.launch() in Python [OK]

Common Mistakes:

• Using incorrect method names like startBrowser()
• Confusing Playwright with Selenium syntax
• Capitalizing Playwright incorrectly in code

3. Given the following code snippet using Cypress, what will be the output if the element with id #submit is not found?

cy.get('#submit').click()

medium

A. Test fails with an error that element was not found

B. Test passes silently without clicking

C. Test retries indefinitely until element appears

D. Test skips the click and logs a warning

Solution

1. Step 1: Understand Cypress default behavior

   Cypress automatically retries commands for a default timeout but if the element is not found within that time, it throws an error.

2. Step 2: Analyze the code effect

   Since cy.get('#submit').click() requires the element, failure to find it causes the test to fail with an error.

3. Final Answer:

   Test fails with an error that element was not found -> Option A

4. Quick Check:

   Cypress fails test if element missing [OK]

Hint: Cypress fails test if element not found after retries [OK]

Common Mistakes:

• Thinking Cypress passes silently
• Assuming infinite retries
• Believing it logs warning but continues

4. You wrote this Selenium Python code but it throws an error:

driver = webdriver.Chrome()
driver.get('https://example.com')
element = driver.find_element_by_id('login')
element.click()

What is the likely cause and fix?

medium

A. click() method does not exist; use submit() instead

B. Method find_element_by_id is deprecated; use find_element(By.ID, 'login') instead

C. URL is incorrect; fix the URL string

D. Chrome driver is not installed; install it first

Solution

1. Step 1: Identify deprecated method usage

   In recent Selenium versions, find_element_by_id is deprecated and replaced by find_element with By.ID locator.

2. Step 2: Apply correct method usage

   Use from selenium.webdriver.common.by import By and then driver.find_element(By.ID, 'login') to fix the error.

3. Final Answer:

   Method find_element_by_id is deprecated; use find_element(By.ID, 'login') instead -> Option B

4. Quick Check:

   Use By.ID locator, not deprecated method [OK]

Hint: Use find_element(By.ID, ...) instead of deprecated find_element_by_id [OK]

Common Mistakes:

• Ignoring deprecation warnings
• Assuming click() method is missing
• Blaming URL or driver installation incorrectly

5. You want to write a test that runs on Chromium, Firefox, and WebKit browsers using Playwright in Python. Which approach correctly achieves this multi-browser testing?

hard

A. Run tests only on Chromium; Playwright does not support Firefox or WebKit

B. Use Cypress since it supports all three browsers natively

C. Use Selenium only because Playwright supports one browser at a time

D. Loop over playwright.chromium, playwright.firefox, and playwright.webkit to launch each browser and run tests

Solution

1. Step 1: Understand Playwright multi-browser support

   Playwright supports Chromium, Firefox, and WebKit browsers and allows launching each separately.

2. Step 2: Implement multi-browser testing

   Looping over playwright.chromium, playwright.firefox, and playwright.webkit to launch browsers and run tests is the correct approach.

3. Final Answer:

   Loop over playwright.chromium, playwright.firefox, and playwright.webkit to launch each browser and run tests -> Option D

4. Quick Check:

   Playwright multi-browser testing = loop launch [OK]

Hint: Loop over Playwright browsers to test all three [OK]

Common Mistakes:

• Thinking Playwright supports only one browser
• Choosing Cypress for multi-browser Python tests
• Assuming Selenium is the only multi-browser tool