Compatibility testing in Testing Fundamentals - Test Execution Trace

Test Overview

This test checks if a web application works correctly on different browsers and operating systems. It verifies that the main page loads and the login button is clickable on each platform.

Test Code - Selenium with unittest

Testing Fundamentals

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 CompatibilityTest(unittest.TestCase):
    def setUp(self):
        # Example: Chrome driver setup; in real tests, this would vary per browser/OS
        self.driver = webdriver.Chrome()
        self.driver.implicitly_wait(5)

    def test_main_page_loads_and_login_button(self):
        driver = self.driver
        driver.get('https://example.com')

        # Wait for main page title to be correct
        WebDriverWait(driver, 10).until(EC.title_contains('Example Domain'))

        # Find login button by accessible name
        login_button = WebDriverWait(driver, 10).until(
            EC.element_to_be_clickable((By.CSS_SELECTOR, 'button[aria-label="Login"]'))
        )

        self.assertTrue(login_button.is_displayed(), 'Login button should be visible')

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

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

Execution Trace - 6 Steps

Step	Action	System State	Assertion	Result
1	Test starts and Chrome browser opens	Chrome browser window is open and ready	-	PASS
2	Navigates to 'https://example.com'	Browser loads the Example Domain main page	-	PASS
3	Waits until page title contains 'Example Domain'	Page title is 'Example Domain'	Title contains 'Example Domain'	PASS
4	Finds login button with aria-label 'Login' and waits until clickable	Login button is visible and enabled on the page	Login button is clickable	PASS
5	Checks if login button is displayed	Login button is visible to user	login_button.is_displayed() returns True	PASS
6	Test ends and browser closes	Browser window is closed	-	PASS

Failure Scenario

Failing Condition: Login button is missing or not clickable on a specific browser or OS

Execution Trace Quiz - 3 Questions

What does the test verify after navigating to the website?

A The browser window size

B The page title contains 'Example Domain'

C The URL contains 'login'

D The browser console has no errors

Key Result

Always verify key interactive elements are present and usable on all target browsers and operating systems to ensure compatibility.