Handle Sequential Alerts

How it works

Some actions open one dialog after another: the page shows a second alert only once the first is closed. Each dialog needs its own read and accept. An Alert is not tied to one dialog: it always acts on whichever dialog is open now. Switching again for each dialog keeps the code clear about which one you are reading.

Here the second alert opens as soon as the first is accepted, but in real apps a follow-up dialog often comes after a delay or a network call, so waiting is the safer habit. new WebDriverWait(driver, Duration.ofSeconds(5)).until(ExpectedConditions.alertIsPresent()) waits for it and returns the Alert.

After the second alert is accepted, the sequence ends. Switching again throws NoAlertPresentException, which is a simple way to check that no extra dialog appeared.

About the assignment

One button on the Alerts page opens two alerts in a row. You handle both, keeping each message, and print the two messages once the page is free again.

What you will do

1. 1Click the sequential alerts button, located by its label.
2. 2Switch to the first alert, keep its text in a String, and accept it.
3. 3Wait for the second alert with alertIsPresent(), keep its text in another String, and accept it.
4. 4Print the two messages with the labels Alert 1: and Alert 2:.

Common mistakes

• Expecting the old Alert to still show the first message

  After accept(), the same Alert object reads whatever dialog is open now, so a second getText() on it returns the second message. Store the first text before accepting.

• Touching the page between the alerts

  Any page command, such as findElement() or getTitle(), while the second alert is open throws UnhandledAlertException and the alert is dismissed. Keep the strings and print at the end.

• Switching without a wait in real apps

  When a follow-up dialog depends on a delay or a request, an immediate switchTo().alert() can run before it opens and throw NoAlertPresentException. alertIsPresent() waits for it.

In a real test suite

Related lessons

• Handle Simple AlertThe single-alert version of this flow.
• Explicit Wait - Element VisibleHow WebDriverWait and until() work, applied here to alerts.
• Switch to Frame by IDSwitch into a frame, the next switchTo() target.

To try one of these calls on any page without a task, open the Online Selenium Java Compiler.

Starter code

The editor above opens with this code. Fill in the TODO lines, then run and submit it.

import org.openqa.selenium.*;
import org.openqa.selenium.chrome.ChromeDriver;

public class Main {
    public static void main(String[] args) throws Exception {
        WebDriver driver = new ChromeDriver();
        driver.get("https://testkru.com/Interactions/Alerts");
        
        // TODO: Click "Show Sequential Alerts"
        // TODO: Handle first alert
        // TODO: Handle second alert
        // TODO: Print both alert texts
        
        driver.quit();
    }
}