Have you had experience creating or automating end-to-end testing for system functionality?

Yes, I have experience in creating and automating end-to-end testing of system functionality using Python. I typically use frameworks such as Selenium or Playwright, which allow automating interactions with the user interface.

Here's an example of a simple test using Selenium:

from selenium import webdriver
from selenium.webdriver.common.by import By

# Initialize the driver
browser = webdriver.Chrome()

# Open the page
browser.get('https://example.com/login')

# Find fields and enter data
browser.find_element(By.ID, 'username').send_keys('user')
browser.find_element(By.ID, 'password').send_keys('pass')

# Click the login button
browser.find_element(By.ID, 'login-button').click()

# Verify that the transition to the desired page occurred
assert 'dashboard' in browser.current_url

browser.quit()

This approach allows testing the entire chain from user input to the result in the interface.