from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
import unittest
class LoginPageAccessibilityTest(unittest.TestCase):
def setUp(self):
self.driver = webdriver.Chrome()
self.wait = WebDriverWait(self.driver, 10)
self.driver.get('https://example.com/login')
def test_accessibility(self):
driver = self.driver
wait = self.wait
# Wait for email input and check label
email_input = wait.until(EC.visibility_of_element_located((By.ID, 'email')))
email_label = driver.find_element(By.CSS_SELECTOR, 'label[for="email"]')
self.assertTrue(email_label.is_displayed(), 'Email label is not displayed')
self.assertTrue(email_label.text.strip() != '', 'Email label text is empty')
# Wait for password input and check label
password_input = wait.until(EC.visibility_of_element_located((By.ID, 'password')))
password_label = driver.find_element(By.CSS_SELECTOR, 'label[for="password"]')
self.assertTrue(password_label.is_displayed(), 'Password label is not displayed')
self.assertTrue(password_label.text.strip() != '', 'Password label text is empty')
# Check login button accessible name (aria-label or text)
login_button = wait.until(EC.visibility_of_element_located((By.ID, 'login-button')))
accessible_name = login_button.get_attribute('aria-label') or login_button.text
self.assertTrue(accessible_name.strip() != '', 'Login button accessible name is empty')
# Check images have alt attribute
images = driver.find_elements(By.TAG_NAME, 'img')
for img in images:
alt_text = img.get_attribute('alt')
self.assertIsNotNone(alt_text, 'Image missing alt attribute')
self.assertTrue(alt_text.strip() != '', 'Image alt attribute is empty')
# Keyboard navigation test
# Focus email input
email_input.click()
self.assertEqual(driver.switch_to.active_element, email_input, 'Focus is not on email input')
# Press Tab to move focus to password input
from selenium.webdriver.common.keys import Keys
email_input.send_keys(Keys.TAB)
self.assertEqual(driver.switch_to.active_element, password_input, 'Focus did not move to password input')
# Press Tab to move focus to login button
password_input.send_keys(Keys.TAB)
self.assertEqual(driver.switch_to.active_element, login_button, 'Focus did not move to login button')
def tearDown(self):
self.driver.quit()
if __name__ == '__main__':
unittest.main()This test script uses Selenium with Python's unittest framework to automate accessibility checks on a login page.
First, it opens the login page URL in a Chrome browser.
It waits explicitly for the email and password input fields to be visible, then finds their associated labels using the for attribute. It asserts that these labels are visible and have text, ensuring screen readers can announce them.
Next, it checks the login button for an accessible name, either from the aria-label attribute or visible text.
It then verifies all images on the page have non-empty alt attributes, which is important for screen readers.
For keyboard navigation, it simulates tabbing through the email input, password input, and login button, asserting that the focus moves logically and is on the expected element.
The test uses explicit waits to avoid timing issues and semantic locators like By.ID and By.CSS_SELECTOR for maintainability.
Finally, the browser closes after the test.
