To check javascript alert message we can use the following sample code –
package com.webdriver_05; import org.openqa.selenium.Alert; import org.openqa.selenium.WebDriver; import org.openqa.selenium.firefox.FirefoxDriver; public class MyAlert { public WebDriver driver; private String baseUrl; public static void main(String[] args){ MyAlert al = new MyAlert(); al.launch_browser(); } public void launch_browser(){ try{ baseUrl = "http://demo.tanmaysarkar.com/alert/"; driver = new FirefoxDriver(); driver.get(baseUrl); boolean isFlagePresent = false; Alert alert = driver.switchTo().alert(); isFlagePresent = true; System.out.println(alert.getText()); alert.accept(); System.out.println(isFlagePresent); driver.quit(); } catch (Exception ex) { ex.getMessage(); } } }