Testing in the software development lifecycle in Testing Fundamentals - Test Execution Trace

Test Overview

This test simulates a simple verification of a login page during the software development lifecycle. It checks that the login button is present and clickable, and that a successful login message appears after submitting valid credentials.

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

    def test_login_button_and_success_message(self):
        driver = self.driver
        wait = WebDriverWait(driver, 10)

        # Wait for login button to be clickable
        login_button = wait.until(EC.element_to_be_clickable((By.ID, 'login-btn')))
        self.assertTrue(login_button.is_displayed())

        # Enter username and password
        driver.find_element(By.ID, 'username').send_keys('testuser')
        driver.find_element(By.ID, 'password').send_keys('password123')

        # Click login button
        login_button.click()

        # Wait for success message
        success_message = wait.until(EC.visibility_of_element_located((By.ID, 'success-msg')))
        self.assertEqual(success_message.text, 'Login successful!')

    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 opens Chrome browser	Browser window opens at 'https://example.com/login' page	-	PASS
2	Waits until the login button with ID 'login-btn' is clickable	Login page fully loaded with login button visible and enabled	Checks that login button is displayed	PASS
3	Finds username and password input fields and enters credentials	Username field contains 'testuser', password field contains 'password123'	-	PASS
4	Clicks the login button	Login form submitted, page processes login	-	PASS
5	Waits for the success message with ID 'success-msg' to appear	Success message 'Login successful!' is visible on the page	Verifies success message text equals 'Login successful!'	PASS
6	Test ends and browser closes	Browser window closes	-	PASS

Failure Scenario

Failing Condition: Login button with ID 'login-btn' is not found or not clickable within 10 seconds

Execution Trace Quiz - 3 Questions

What does the test verify first after opening the login page?

A That the login button is clickable

B That the success message is visible

C That the username field is empty

D That the password is correct

Key Result

Always wait explicitly for elements to be ready before interacting with them to avoid flaky tests during software development lifecycle.