A simple test using the PageElements

test_login.py

from selenium.webdriver.support.ui import WebDriverWait

import pages

def test_login_with_invalid_credentials(login_url):

    try:
        driver = get_browser()
        driver.get(login_url)

        login_page = pages.LoginPage(driver)

        # Can't use this method here since we want to actually test the various aspects of
        # logging in and failing to log in
        # login_page.login() - Use this in other tests where you just need to login to do the
        # test

        login_page.username = XXXXXXXX
        login_page.password = XXXXXXXX

        login_page.click_login_button()

        assert(login_page.error_message.text == 'Invalid email or password. Please try again.')
        assert(driver.current_url == login_url)

    finally:
        logger.info('Quitting browser')
        driver.quit()