Parameterize with test data in Selenium Python - Test Execution Trace

Test Overview

This test opens a login page and tries multiple username and password combinations. It checks if the login success message appears for each set of data.

Test Code - Selenium

Selenium Python

import unittest
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

class TestLogin(unittest.TestCase):
    def setUp(self):
        self.driver = webdriver.Chrome()
        self.driver.get('https://example.com/login')

    def test_login_with_multiple_users(self):
        test_data = [
            ("user1", "pass1"),
            ("user2", "pass2"),
            ("user3", "pass3")
        ]
        for username, password in test_data:
            username_field = WebDriverWait(self.driver, 10).until(
                EC.presence_of_element_located((By.ID, "username"))
            )
            password_field = self.driver.find_element(By.ID, "password")
            login_button = self.driver.find_element(By.ID, "login-btn")

            username_field.clear()
            username_field.send_keys(username)
            password_field.clear()
            password_field.send_keys(password)
            login_button.click()

            success_message = WebDriverWait(self.driver, 10).until(
                EC.presence_of_element_located((By.ID, "success-msg"))
            )
            self.assertTrue(success_message.is_displayed(), f"Login failed for {username}")

            # Navigate back to login page for next iteration
            self.driver.get('https://example.com/login')

    def tearDown(self):
        self.driver.quit()

if __name__ == '__main__':
    unittest.main()

Execution Trace - 8 Steps

Step	Action	System State	Assertion	Result
1	Test starts and Chrome browser opens	Browser window opened at https://example.com/login	-	PASS
2	Find username, password fields and login button	Login page loaded with input fields and button visible	Check presence of username, password fields and login button	PASS
3	Enter username 'user1' and password 'pass1', then click login	Login form filled and submitted	-	PASS
4	Wait for success message to appear	Success message displayed on page	Verify success message is displayed	PASS
5	Navigate back to login page	Login page reloaded for next test data	-	PASS
6	Repeat steps 2-5 for username 'user2' and password 'pass2'	Login page loaded, form filled, submitted, success message shown	Verify success message is displayed for user2	PASS
7	Repeat steps 2-5 for username 'user3' and password 'pass3'	Login page loaded, form filled, submitted, success message shown	Verify success message is displayed for user3	PASS
8	Test ends and browser closes	Browser closed	-	PASS

Failure Scenario

Failing Condition: Success message does not appear after login attempt

Execution Trace Quiz - 3 Questions

What does the test do after each login attempt?

A Closes the browser immediately

B Skips to the next test without checking success

C Navigates back to the login page for the next data set

D Refreshes the current page without navigation

Key Result

Parameterizing tests with multiple data sets helps verify the same functionality with different inputs efficiently, reducing code duplication and improving coverage.