Confirmation alert handling in Selenium Python - Test Execution Trace

Test Overview

This test opens a webpage with a confirmation alert, clicks a button to trigger the alert, accepts the alert, and verifies the confirmation message on the page.

Test Code - Selenium

Selenium Python

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 TestConfirmationAlert(unittest.TestCase):
    def setUp(self):
        self.driver = webdriver.Chrome()
        self.driver.get('https://example.com/confirmation-alert')

    def test_accept_confirmation_alert(self):
        driver = self.driver
        # Click the button that triggers the confirmation alert
        button = WebDriverWait(driver, 10).until(
            EC.element_to_be_clickable((By.ID, 'confirm-btn'))
        )
        button.click()

        # Wait for the alert to be present
        alert = WebDriverWait(driver, 10).until(EC.alert_is_present())

        # Accept the confirmation alert
        alert.accept()

        # Verify the confirmation message is displayed
        message = WebDriverWait(driver, 10).until(
            EC.visibility_of_element_located((By.ID, 'confirm-message'))
        )
        self.assertEqual(message.text, 'You clicked OK!')

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

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

Execution Trace - 7 Steps

Step	Action	System State	Assertion	Result
1	Test starts and opens Chrome browser	Browser window opens at URL https://example.com/confirmation-alert	-	PASS
2	Waits until the button with ID 'confirm-btn' is clickable	Page fully loaded with visible button 'confirm-btn'	Button is clickable	PASS
3	Clicks the 'confirm-btn' button to trigger confirmation alert	Confirmation alert appears on screen	-	PASS
4	Waits for the confirmation alert to be present	Alert dialog is present and active	Alert is present	PASS
5	Accepts the confirmation alert by clicking OK	Alert disappears, page updates accordingly	-	PASS
6	Waits for the confirmation message element with ID 'confirm-message' to be visible	Confirmation message 'You clicked OK!' is visible on the page	Message text equals 'You clicked OK!'	PASS
7	Test ends and browser closes	Browser window closed	-	PASS

Failure Scenario

Failing Condition: The confirmation alert does not appear after clicking the button

Execution Trace Quiz - 3 Questions

What does the test do after clicking the button with ID 'confirm-btn'?

A Waits for and accepts the confirmation alert

B Immediately checks the confirmation message without waiting

C Closes the browser

D Clicks the button again

Key Result

Always wait explicitly for alerts before interacting with them to avoid timing issues and ensure reliable test execution.