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.

Practice

1. What is the correct method to accept a confirmation alert in Selenium with Python?

easy

A. driver.confirm.accept()

B. driver.switch_to.alert.dismiss()

C. driver.switch_to.alert.accept()

D. driver.alert.accept()

Solution

1. Step 1: Switch to the alert

   Use driver.switch_to.alert to access the alert popup.

2. Step 2: Accept the alert

   Call accept() on the alert object to confirm it.

3. Final Answer:

   driver.switch_to.alert.accept() -> Option C

4. Quick Check:

   Accept alert = driver.switch_to.alert.accept() [OK]

Hint: Use switch_to.alert before accept() to handle confirmation [OK]

Common Mistakes:

• Using dismiss() instead of accept() to confirm
• Calling accept() directly on driver without switch_to.alert
• Using incorrect method names like confirm.accept()

2. Which of the following is the correct syntax to dismiss a confirmation alert in Selenium Python?

easy

A. driver.alert.dismiss()

B. driver.switch_to.alert.dismiss()

C. driver.dismiss.alert()

D. driver.switch_to.dismiss()

Solution

1. Step 1: Access the alert

   Use driver.switch_to.alert to get the alert object.

2. Step 2: Call dismiss() method

   Use dismiss() to cancel or reject the confirmation alert.

3. Final Answer:

   driver.switch_to.alert.dismiss() -> Option B

4. Quick Check:

   Dismiss alert = driver.switch_to.alert.dismiss() [OK]

Hint: Dismiss confirmation alert with switch_to.alert.dismiss() [OK]

Common Mistakes:

• Calling dismiss() on driver directly
• Using wrong method order like switch_to.dismiss()
• Using driver.alert.dismiss() which is invalid

3. What will be the output of the following code snippet if the confirmation alert is accepted?

driver.find_element(By.ID, 'confirmBtn').click()
alert = driver.switch_to.alert
alert.accept()
print('Alert accepted')

medium

A. Alert accepted

B. Alert dismissed

C. No output, code throws exception

D. Alert text printed

Solution

1. Step 1: Click triggers confirmation alert

   The button click opens a confirmation alert popup.

2. Step 2: Accept the alert and print message

   The alert is accepted using alert.accept(), then prints 'Alert accepted'.

3. Final Answer:

   Alert accepted -> Option A

4. Quick Check:

   Accept alert prints confirmation message [OK]

Hint: Accept alert then print confirmation message [OK]

Common Mistakes:

• Expecting alert text to print instead of message
• Using dismiss() but expecting accept output
• Not switching to alert before accept()

4. Identify the error in the following code that tries to dismiss a confirmation alert:

driver.find_element(By.ID, 'confirmBtn').click()
alert = driver.alert
alert.dismiss()

medium

A. Incorrect alert access; should use driver.switch_to.alert

B. dismiss() method does not exist for alerts

C. Missing import for By module

D. No error; code is correct

Solution

1. Step 1: Check alert access method

   The code uses driver.alert, which is invalid in Selenium Python.

2. Step 2: Correct way to access alert

   Use driver.switch_to.alert to get the alert object before calling dismiss().

3. Final Answer:

   Incorrect alert access; should use driver.switch_to.alert -> Option A

4. Quick Check:

   Alert access = driver.switch_to.alert [OK]

Hint: Always use driver.switch_to.alert to access alerts [OK]

Common Mistakes:

• Using driver.alert instead of driver.switch_to.alert
• Calling dismiss() on wrong object
• Ignoring import errors unrelated to alert handling

5. You want to verify the text of a confirmation alert before accepting it. Which code snippet correctly handles this scenario?

hard

A. alert = driver.switch_to.alert
if alert.get_text == 'Are you sure?':
alert.accept()

B. alert = driver.alert
if alert.getText() == 'Are you sure?':
alert.accept()

C. alert = driver.switch_to.alert
if alert.text() == 'Are you sure?':
alert.dismiss()

D. alert = driver.switch_to.alert
if alert.text == 'Are you sure?':
alert.accept()

Solution

1. Step 1: Access alert correctly

   Use driver.switch_to.alert to get the alert object.

2. Step 2: Check alert text property

   Use alert.text (property, not method) to get alert message and compare.

3. Step 3: Accept alert if text matches

   If text matches 'Are you sure?', call alert.accept() to confirm.

4. Final Answer:

   alert = driver.switch_to.alert if alert.text == 'Are you sure?': alert.accept() -> Option D

5. Quick Check:

   Use alert.text property and accept() method [OK]

Hint: Use alert.text property to check text before accept() [OK]

Common Mistakes:

• Using alert.text() as a method instead of property
• Using driver.alert instead of driver.switch_to.alert
• Calling dismiss() when accept() is needed