If your application triggers any JavaScript pop-ups (a.k.a. alerts, dialogs, etc.) then you need to know how to handle them in your Selenium tests.
Built into Selenium is the ability to switch to an alert window and either accept or dismiss it. This way your tests can continue unencumbered by dialog boxes that may feel just out of reach.
Let’s check an example.
Sample code
Java
// filename: JavaScriptAlert.java
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.Alert;
import org.openqa.selenium.By;
import org.openqa.selenium.firefox.FirefoxDriver;
import static org.hamcrest.CoreMatchers.*;
import static org.hamcrest.MatcherAssert.assertThat;
public class JavaScriptAlert {
WebDriver driver;
@Before
public void setUp() throws Exception {
driver = new FirefoxDriver();
}
@After
public void tearDown() throws Exception {
driver.quit();
}
@Test
public void JavaScriptAlertTest() {
driver.get("http://the-internet.herokuapp.com/javascript_alerts");
driver.findElement(By.cssSelector(".example li:nth-child(2) button")).click();
Alert popup = driver.switchTo().alert();
popup.accept();
String result = driver.findElement(By.id("result")).getText();
assertThat(result, is(equalTo("You clicked: Ok")));
}
}
Python
# filename: javascript_alerts.py
import unittest
from selenium import webdriver
class JavaScriptAlerts(unittest.TestCase):
def setUp(self):
self.driver = webdriver.Firefox()
def tearDown(self):
self.driver.quit()
def test_example_1(self):
driver = self.driver
driver.get('http://the-internet.herokuapp.com/javascript_alerts')
driver.find_elements_by_tag_name('button')[1].click()
popup = driver.switch_to.alert
popup.accept()
result = driver.find_element_by_id('result').text
assert result == 'You clicked: Ok'
if __name__ == "__main__":
unittest.main()
Ruby
# filename: javascript_alerts.rb
require 'selenium-webdriver'
require 'rspec/expectations'
include RSpec::Matchers
def setup
@driver = Selenium::WebDriver.for :firefox
end
def teardown
@driver.quit
end
def run
setup
yield
teardown
end
run do
@driver.get 'http://the-internet.herokuapp.com/javascript_alerts'
@driver.find_elements(css: 'button')[1].click
popup = @driver.switch_to.alert
popup.accept
result = @driver.find_element(id: 'result').text
expect(result).to eql('You clicked: Ok')
end
C#
// filename: JavaScriptAlerts.cs
using NUnit.Framework;
using OpenQA.Selenium;
using OpenQA.Selenium.Firefox;
public class JavaScriptAlerts
{
IWebDriver Driver;
[SetUp]
public void SetUp()
{
Driver = new FirefoxDriver();
}
[TearDown]
public void TearDown()
{
Driver.Quit();
}
[Test]
public void JavaScriptAlertAppearsAndAccepted()
{
Driver.Navigate().GoToUrl("http://the-internet.herokuapp.com/javascript_alerts");
Driver.FindElement(By.CssSelector(".example li:nth-child(2) button")).Click();
IAlert Popup = Driver.SwitchTo().Alert();
Popup.Accept();
string Result = Driver.FindElement(By.Id("result")).Text;
Assert.That(Result.Equals("You clicked: Ok"));
}
}
When you run it here is what will happen:
- Open the browser
- Load the page
- Click the second button on the page
- JavaScript Confirmation Alert appears
- JavaScript Confirmation Alert is accepted and goes away
- Assert that the result on the page is what we expect
- Close the browser