Prompt alert with text input in Selenium Python

Introduction

Prompt alerts let websites ask you to type something. Testing them ensures your site handles user input correctly.

When a website asks for your name or other info in a popup.

When testing forms that use prompt alerts for extra input.

When verifying that the input text is accepted and processed.

When checking how your app reacts to canceling or submitting prompt alerts.

Syntax

Selenium Python

alert = driver.switch_to.alert
alert.send_keys('your text')
alert.accept()

Use switch_to.alert to access the prompt alert.

send_keys() types text into the prompt.

Examples

Types 'Hello' into the prompt and clicks OK.

Selenium Python

alert = driver.switch_to.alert
alert.send_keys('Hello')
alert.accept()

Types '12345' but clicks Cancel instead of OK.

Selenium Python

alert = driver.switch_to.alert
alert.send_keys('12345')
alert.dismiss()

Sample Program

This script opens a page with a button that triggers a prompt alert. It types 'Alice' into the prompt and accepts it. Then it prints the page text which should greet Alice.

Selenium Python

from selenium import webdriver
from selenium.webdriver.common.by import By
import time

# Setup driver
options = webdriver.ChromeOptions()
options.add_argument('--headless=new')
driver = webdriver.Chrome(options=options)

try:
    # Open a simple page with prompt alert
    driver.get('data:text/html,<script>function showPrompt() { var result = prompt(\'Enter your name:\'); document.body.innerHTML = result ? `Hello, ${result}!` : 'No name entered.'; }</script><button onclick="showPrompt()">Click me</button>')

    # Click the button to open prompt
    button = driver.find_element(By.TAG_NAME, 'button')
    button.click()

    # Switch to prompt alert
    alert = driver.switch_to.alert

    # Send text input
    alert.send_keys('Alice')

    # Accept the prompt
    alert.accept()

    time.sleep(1)  # Wait for page update

    # Verify the page shows the input
    body_text = driver.find_element(By.TAG_NAME, 'body').text
    print(body_text)

finally:
    driver.quit()

Important Notes

Always switch to the alert before interacting with it.

Use accept() to click OK and dismiss() to click Cancel.

Prompt alerts pause script execution until handled.

Summary

Prompt alerts ask users for text input in a popup.

Use switch_to.alert to access and send_keys() to type text.

Accept or dismiss the alert to continue the test.

Practice

1. What is the main purpose of handling a prompt alert with text input in Selenium?

easy

A. To scroll the webpage automatically

B. To enter text into a popup alert and accept it

C. To click a button on the webpage

D. To take a screenshot of the alert

Solution

1. Step 1: Understand prompt alerts

   Prompt alerts allow users to enter text in a popup box on the webpage.

2. Step 2: Handling prompt alerts in Selenium

   Selenium can switch to the alert, send text input, and accept it to proceed.

3. Final Answer:

   To enter text into a popup alert and accept it -> Option B

4. Quick Check:

   Prompt alert = text input + accept [OK]

Hint: Prompt alert means input text then accept [OK]

Common Mistakes:

• Confusing prompt alert with simple alerts
• Trying to send keys without switching to alert
• Ignoring the accept() step after input

2. Which Selenium Python code snippet correctly sends text 'hello' to a prompt alert and accepts it?

easy

A. driver.send_keys('hello')
alert.accept()

B. alert = driver.find_element_by_id('alert')
alert.send_keys('hello')
alert.accept()

C. alert = driver.switch_to.alert
alert.send_keys('hello')
alert.accept()

D. alert = driver.switch_to.alert
alert.dismiss()
alert.send_keys('hello')

Solution

1. Step 1: Switch to alert correctly

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

2. Step 2: Send keys and accept alert

   Call send_keys('hello') then accept() to input text and confirm.

3. Final Answer:

   alert = driver.switch_to.alert alert.send_keys('hello') alert.accept() -> Option C

4. Quick Check:

   switch_to.alert + send_keys + accept = correct [OK]

Hint: Always switch_to.alert before sending keys [OK]

Common Mistakes:

• Using find_element instead of switch_to.alert
• Calling dismiss() before send_keys
• Sending keys without switching to alert

3. What will be the output of this Selenium Python code if the prompt alert expects a name and you input 'Alice'?

alert = driver.switch_to.alert
alert.send_keys('Alice')
alert.accept()
result = driver.find_element(By.ID, 'result').text
print(result)

medium

A. Alert dismissed without input

B. No alert found error

C. Empty string printed

D. Hello Alice! Your input was received.

Solution

1. Step 1: Input text and accept alert

   The code sends 'Alice' to the prompt alert and accepts it, so input is registered.

2. Step 2: Retrieve result text from page

   The page updates an element with ID 'result' to show a greeting including the input.

3. Final Answer:

   Hello Alice! Your input was received. -> Option D

4. Quick Check:

   Input 'Alice' + accept = greeting message [OK]

Hint: Accepted prompt input updates page text [OK]

Common Mistakes:

• Expecting error without alert present
• Not retrieving updated element text
• Assuming alert dismiss clears input

4. Identify the error in this Selenium Python code snippet handling a prompt alert:

alert = driver.switch_to.alert
alert.accept()
alert.send_keys('Test')

medium

A. send_keys called after accept, alert no longer available

B. Missing import for Alert class

C. Incorrect locator used for alert

D. No error, code works fine

Solution

1. Step 1: Understand alert lifecycle

   Calling accept() closes the alert, so it cannot receive input afterward.

2. Step 2: Correct order for input and accept

   send_keys() must be called before accept() to input text successfully.

3. Final Answer:

   send_keys called after accept, alert no longer available -> Option A

4. Quick Check:

   accept() closes alert, no send_keys after [OK]

Hint: Send keys before accept to avoid alert closed error [OK]

Common Mistakes:

• Calling accept before send_keys
• Ignoring alert closure after accept
• Assuming alert object persists after accept

5. You want to test a prompt alert that asks for user age and rejects empty input. Which Selenium Python code correctly handles this scenario and verifies the rejection message?

hard

A. alert = driver.switch_to.alert
alert.send_keys('')
alert.accept()
msg = driver.find_element(By.ID, 'error').text
assert msg == 'Input required'

B. alert = driver.switch_to.alert
alert.dismiss()
msg = driver.find_element(By.ID, 'error').text
assert msg == 'Input required'

C. alert = driver.switch_to.alert
alert.send_keys('25')
alert.dismiss()
msg = driver.find_element(By.ID, 'error').text
assert msg == 'Input required'

D. alert = driver.switch_to.alert
alert.send_keys('')
alert.dismiss()
msg = driver.find_element(By.ID, 'error').text
assert msg == 'Input required'

Solution

1. Step 1: Send empty input and accept alert

   Send empty string to prompt and accept to simulate empty input submission.

2. Step 2: Verify error message on page

   Check the element with ID 'error' for the rejection message 'Input required'.

3. Final Answer:

   Send empty input + accept + assert error message -> Option A

4. Quick Check:

   Empty input + accept triggers error message [OK]

Hint: Send empty string then accept to test input validation [OK]

Common Mistakes:

• Dismissing alert instead of accepting
• Not sending any input before accept
• Checking wrong element for error message