Alert accept and dismiss in Selenium Java - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is an alert in Selenium WebDriver?

An alert is a popup box that appears on the webpage to show messages or ask for user confirmation. Selenium can switch to this alert to interact with it.

beginner

How do you accept an alert in Selenium Java?

Use driver.switchTo().alert().accept(); to click the OK button on the alert popup.

beginner

How do you dismiss an alert in Selenium Java?

Use driver.switchTo().alert().dismiss(); to click the Cancel button or close the alert popup.

intermediate

What happens if you try to interact with an alert without switching to it first?

Selenium throws a NoAlertPresentException because it cannot find the alert unless you switch to it first.

intermediate

Write the code snippet to accept an alert and verify the alert text is 'Are you sure?'.

String alertText = driver.switchTo().alert().getText(); assert alertText.equals("Are you sure?"); driver.switchTo().alert().accept();

Which Selenium method is used to accept an alert popup?

A driver.switchTo().alert().accept()

B driver.switchTo().alert().dismiss()

C driver.acceptAlert()

D driver.alert().accept()

The correct method to accept an alert is driver.switchTo().alert().accept().

What does driver.switchTo().alert().dismiss() do?

A Clicks Cancel or closes the alert

B Throws an exception

C Clicks OK on the alert

D Switches to the alert without any action

Dismiss() clicks Cancel or closes the alert popup.

Before accepting or dismissing an alert, what must you do?

A Refresh the page

B No action needed

C Close the browser

D Switch to the alert using driver.switchTo().alert()

You must switch to the alert first to interact with it.

What exception is thrown if you try to accept an alert when none is present?

A TimeoutException

B NoSuchElementException

C NoAlertPresentException

D ElementNotVisibleException

NoAlertPresentException is thrown when no alert is found.

How do you get the text displayed on an alert popup?

A driver.getAlertText()

B driver.switchTo().alert().getText()

C driver.alertText()

D driver.getText()

Use driver.switchTo().alert().getText() to read alert text.

Explain the steps to handle an alert popup in Selenium Java.

Think about how you interact with popups in real life.

Write a simple code snippet to dismiss an alert and verify the alert text is 'Confirm delete?'.

Use driver.switchTo().alert() methods.

Practice

1. What does the accept() method do when called on a JavaScript alert in Selenium?

easy

A. Clicks the OK button on the alert

B. Clicks the Cancel button on the alert

C. Closes the browser window

D. Throws an exception without interacting

Solution

1. Step 1: Understand alert interaction methods

   The accept() method is used to click the OK button on an alert popup.

2. Step 2: Differentiate from dismiss()

   The dismiss() method clicks Cancel, so accept() must click OK.

3. Final Answer:

   Clicks the OK button on the alert -> Option A

4. Quick Check:

   accept() = OK click [OK]

Hint: accept() clicks OK, dismiss() clicks Cancel [OK]

Common Mistakes:

• Confusing accept() with dismiss()
• Thinking accept() closes the browser
• Assuming accept() throws an exception

2. Which of the following is the correct syntax to switch to an alert and dismiss it in Selenium Java?

easy

A. driver.switchTo().alert().dismiss();

B. driver.switchTo().alert().cancel();

C. driver.switchTo().alert().close();

D. driver.switchTo().alert().accept();

Solution

1. Step 1: Identify the method to dismiss alert

   The method to click Cancel on an alert is dismiss().

2. Step 2: Confirm correct syntax for switching and dismissing

   The correct chain is driver.switchTo().alert().dismiss(); to dismiss the alert.

3. Final Answer:

   driver.switchTo().alert().dismiss(); -> Option A

4. Quick Check:

   dismiss() = Cancel click [OK]

Hint: Use dismiss() to cancel alerts, accept() to confirm [OK]

Common Mistakes:

• Using accept() instead of dismiss() to cancel
• Using non-existent methods like close() or cancel()
• Missing switchTo().alert() before calling dismiss()

3. Given the following code snippet, what will be printed if the alert is accepted?

driver.switchTo().alert().accept();
System.out.println("Alert handled successfully");

medium

A. UnhandledAlertException

B. Alert handled successfully

C. No output

D. Alert not found error

Solution

1. Step 1: Understand alert acceptance effect

   Calling accept() closes the alert, allowing the next line to execute.

2. Step 2: Check output after alert handling

   Since alert is accepted, System.out.println runs and prints the message.

3. Final Answer:

   Alert handled successfully -> Option B

4. Quick Check:

   accept() closes alert, next line prints [OK]

Hint: accept() lets code continue, so print runs [OK]

Common Mistakes:

• Expecting exception after accept()
• Thinking alert blocks print statement
• Confusing accept() with dismiss() effect

4. Identify the error in this Selenium Java code snippet that tries to dismiss an alert:

Alert alert = driver.switchTo().alert();
alert.accept();
alert.dismiss();

medium

A. alert.dismiss() should be alert.cancel()

B. Calling accept() before dismiss() causes an exception

C. Missing driver.switchTo() before alert()

D. Cannot call dismiss() after accept() on the same alert instance

Solution

1. Step 1: Understand alert lifecycle after accept()

   Once accept() is called, the alert is closed and no longer available.

2. Step 2: Calling dismiss() after accept() is invalid

   Trying to dismiss the same alert after accepting it causes an error because alert is gone.

3. Final Answer:

   Cannot call dismiss() after accept() on the same alert instance -> Option D

4. Quick Check:

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

Hint: Alert closes after accept(), can't dismiss same alert [OK]

Common Mistakes:

• Calling dismiss() after accept() on same alert
• Assuming alert stays open after accept()
• Using non-existent cancel() method

5. You want to write a Selenium Java test that clicks Cancel on a confirmation alert only if the alert text contains the word "Delete". Which code snippet correctly implements this?

hard

A. Alert alert = driver.switchTo().alert();
if (alert.getText() == "Delete") {
alert.accept();
} else {
alert.dismiss();
}

B. Alert alert = driver.switchTo().alert();
alert.dismiss();
if (alert.getText().contains("Delete")) {
alert.accept();
}

C. Alert alert = driver.switchTo().alert();
if (alert.getText().contains("Delete")) {
alert.dismiss();
} else {
alert.accept();
}

D. Alert alert = driver.switchTo().alert();
alert.accept();
alert.dismiss();

Solution

1. Step 1: Check alert text for "Delete" substring

   Use alert.getText().contains("Delete") to detect if alert text includes "Delete".

2. Step 2: Dismiss alert if condition true, else accept

   If text contains "Delete", call dismiss() to click Cancel; otherwise, call accept().

3. Final Answer:

   Alert alert = driver.switchTo().alert(); if (alert.getText().contains("Delete")) { alert.dismiss(); } else { alert.accept(); } -> Option C

4. Quick Check:

   Use contains() and dismiss() for conditional cancel [OK]

Hint: Use getText().contains() before dismiss() or accept() [OK]

Common Mistakes:

• Using == instead of contains() for string check
• Calling dismiss() before checking alert text
• Calling accept() and dismiss() both without condition