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 LoginPage:
def __init__(self, driver):
self.driver = driver
self.email_input = (By.ID, 'email')
self.password_input = (By.ID, 'password')
self.login_button = (By.ID, 'login-btn')
self.error_message = (By.ID, 'error-msg')
def enter_email(self, email):
self.driver.find_element(*self.email_input).clear()
self.driver.find_element(*self.email_input).send_keys(email)
def enter_password(self, password):
self.driver.find_element(*self.password_input).clear()
self.driver.find_element(*self.password_input).send_keys(password)
def click_login(self):
self.driver.find_element(*self.login_button).click()
def get_error_message(self):
wait = WebDriverWait(self.driver, 10)
error_element = wait.until(EC.visibility_of_element_located(self.error_message))
return error_element.text
class TestLoginErrorGuessing(unittest.TestCase):
def setUp(self):
self.driver = webdriver.Chrome()
self.driver.get('https://example.com/login')
self.login_page = LoginPage(self.driver)
def tearDown(self):
self.driver.quit()
def test_invalid_email_format(self):
self.login_page.enter_email('user@@example.com')
self.login_page.enter_password('Password123!')
self.login_page.click_login()
error = self.login_page.get_error_message()
self.assertEqual(error, 'Invalid email format', 'Error message for invalid email is incorrect')
def test_empty_password(self):
self.login_page.enter_email('user@example.com')
self.login_page.enter_password('')
self.login_page.click_login()
error = self.login_page.get_error_message()
self.assertEqual(error, 'Password cannot be empty', 'Error message for empty password is incorrect')
def test_short_password(self):
self.login_page.enter_email('user@example.com')
self.login_page.enter_password('123')
self.login_page.click_login()
error = self.login_page.get_error_message()
self.assertEqual(error, 'Password too short', 'Error message for short password is incorrect')
if __name__ == '__main__':
unittest.main()This test script uses Selenium WebDriver with Python's unittest framework.
The LoginPage class follows the Page Object Model. It stores locators and methods to interact with the login page elements. This keeps the test code clean and easy to maintain.
Each test method performs one error guessing scenario by entering invalid inputs and clicking the login button.
Explicit waits are used to wait for the error message to appear before reading its text. This avoids flaky tests.
Assertions check that the error messages shown match the expected text for each invalid input.
The setup and teardown methods open and close the browser for each test, ensuring a fresh start.
This approach follows best practices like using descriptive locators, explicit waits, and clear assertion messages.
