Simple alert acceptance in Selenium Python - Test Execution Trace

Test Overview

This test opens a webpage with a button that triggers a simple alert popup. It verifies that the alert appears and accepts it successfully.

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 TestSimpleAlertAcceptance(unittest.TestCase):
    def setUp(self):
        self.driver = webdriver.Chrome()
        self.driver.get('https://the-internet.herokuapp.com/javascript_alerts')

    def test_accept_simple_alert(self):
        driver = self.driver
        # Click the button that triggers the alert
        button = driver.find_element(By.XPATH, '//button[text()="Click for JS Alert"]')
        button.click()

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

        # Switch to alert and accept it
        alert = driver.switch_to.alert
        alert_text = alert.text
        alert.accept()

        # Verify the alert text is as expected
        self.assertEqual(alert_text, 'I am a JS Alert')

        # Verify the result text on the page after accepting alert
        result = driver.find_element(By.ID, 'result').text
        self.assertEqual(result, 'You successfully clicked an alert')

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

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

Execution Trace - 9 Steps

Step	Action	System State	Assertion	Result
1	Test starts and Chrome browser opens	Browser window is open, ready to load URL	-	PASS
2	Navigates to 'https://the-internet.herokuapp.com/javascript_alerts'	Page with JavaScript Alerts loaded, showing buttons	-	PASS
3	Finds the button with text 'Click for JS Alert' using XPath	Button element located on the page	-	PASS
4	Clicks the alert trigger button	JavaScript alert popup appears with message	-	PASS
5	Waits up to 10 seconds for alert to be present using WebDriverWait and expected_conditions	Alert is present and active	-	PASS
6	Switches to alert and reads alert text	Alert text captured as 'I am a JS Alert'	Assert alert text equals 'I am a JS Alert'	PASS
7	Accepts the alert (clicks OK)	Alert disappears, page updates result text	-	PASS
8	Finds the result element by ID 'result' and reads its text	Result text is 'You successfully clicked an alert'	Assert result text equals 'You successfully clicked an alert'	PASS
9	Test ends and browser closes	Browser window closed	-	PASS

Failure Scenario

Failing Condition: Alert does not appear after clicking the button or alert text is different

Execution Trace Quiz - 3 Questions

What Selenium method is used to wait for the alert popup to appear?

A WebDriverWait(driver, 10).until(EC.alert_is_present())

B driver.find_element(By.ID, 'alert')

C driver.switch_to.alert.accept()

D driver.get('url')

Key Result

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