Automation maintenance challenges in Testing Fundamentals - Test Execution Trace

Test Overview

This test simulates running an automated UI test that fails due to a changed element locator. It verifies that the test detects the missing element and reports a failure, highlighting a common maintenance challenge in automation.

Test Code - Selenium with unittest

Testing Fundamentals

from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.common.exceptions import NoSuchElementException
import unittest

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

    def test_click_login_button(self):
        driver = self.driver
        try:
            login_button = driver.find_element(By.ID, 'login-btn')
            login_button.click()
            self.assertTrue(True)  # If click succeeds, test passes
        except NoSuchElementException:
            self.fail('Login button not found - locator may be outdated')

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

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

Execution Trace - 4 Steps

Step	Action	System State	Assertion	Result
1	Test starts and Chrome browser opens	Browser window opened at https://example.com/login page	-	PASS
2	Test tries to find element with ID 'login-btn'	Page loaded but element with ID 'login-btn' is missing or changed	Check if element with ID 'login-btn' is present	FAIL
3	NoSuchElementException caught, test fails with message	Test framework records failure due to missing element	Fail test with message 'Login button not found - locator may be outdated'	FAIL
4	Browser closes and test ends	Browser window closed	-	PASS

Failure Scenario

Failing Condition: The element locator 'login-btn' is outdated or changed in the application UI

Execution Trace Quiz - 3 Questions

What caused the test to fail in the execution trace?

A The element with ID 'login-btn' was not found on the page

B The browser failed to open the URL

C The test assertion was incorrect

D The test code had a syntax error

Key Result

Automated tests often fail when UI elements change. Regularly updating locators and maintaining tests is essential to keep automation reliable.