The Selenium Browser Automation Project

Selenium is an umbrella project for a range of tools and libraries that enable and support the automation of web browsers.

It provides extensions to emulate user interaction with browsers, a distribution server for scaling browser allocation, and the infrastructure for implementations of the W3C WebDriver specification that lets you write interchangeable code for all major web browsers.

This project is made possible by volunteer contributors who have put in thousands of hours of their own time, and made the source code freely available for anyone to use, enjoy, and improve.

Selenium brings together browser vendors, engineers, and enthusiasts to further an open discussion around automation of the web platform. The project organises an annual conference to teach and nurture the community.

At the core of Selenium is WebDriver, an interface to write instruction sets that can be run interchangeably in many browsers. Here is one of the simplest instructions you can make:

 import org.openqa.selenium.By;
import org.openqa.selenium.Keys;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.openqa.selenium.support.ui.WebDriverWait;

import static org.openqa.selenium.support.ui.ExpectedConditions.presenceOfElementLocated;

public class HelloSelenium {

    public static void main(String[] args) {
        WebDriver driver = new FirefoxDriver();
        WebDriverWait wait = new WebDriverWait(driver, 10);
        try {
            driver.get("http://google.com/ncr");
            driver.findElement(By.name("q")).sendKeys("cheese" + Keys.ENTER);
            WebElement firstResult = wait.until(presenceOfElementLocated(By.cssSelector("h3>a")));
            System.out.println(firstResult.getText());
        } finally {
            driver.quit();
        }
    }
}
 from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.common.keys import Keys
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support.expected_conditions import presence_of_element_located

#This example requires Selenium WebDriver 3.13 or newer
with webdriver.Firefox() as driver:
    wait = WebDriverWait(driver, 10)
    driver.get("http://google.com/ncr")
    driver.find_element_by_name("q").send_keys("cheese" + Keys.RETURN)
    first_result = wait.until(presence_of_element_located((By.CSS_SELECTOR, "h3>a")))
    print(first_result.text)
 using System;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using OpenQA.Selenium;
using OpenQA.Selenium.Firefox;
using OpenQA.Selenium.Support.UI;

namespace Selenium.Docs
{
    [TestClass]
    public class HelloSelenium
    {
        private static IWebDriver driver;

        [TestMethod]
        public void Example()
        {
            driver = new FirefoxDriver();
            WebDriverWait wait = new WebDriverWait(driver, TimeSpan.FromSeconds(10));
            driver.Navigate().GoToUrl("http://www.google.com/ncr");
            driver.FindElement(By.Name("q")).SendKeys("cheese" + Keys.Return);
            IWebElement firstResult = wait.Until(wd => wd.FindElement(By.CssSelector("h3>a")));
            Console.WriteLine(firstResult.Text);
        }

        [TestCleanup]
        public void TearDown()
        {
            driver.Quit();
        }
    }
}
 require 'selenium-webdriver'

driver = Selenium::WebDriver.for :firefox
wait = Selenium::WebDriver::Wait.new(timeout: 10)

begin
    driver.get 'http://google.com'
    driver.find_element(name: 'q').send_keys 'cheese', :return
    first_result = wait.until { driver.find_element(css: 'h3>a') }
    print first_result.text
ensure
    driver.quit
end
 const {Builder, By, Key, until} = require('selenium-webdriver');

(async function example() {
    let driver = await new Builder().forBrowser('firefox').build();
    try {
        await driver.get('http://www.google.com/ncr');
        await driver.findElement(By.name('q')).sendKeys('cheese', Key.RETURN);
        let firstResult = await driver.wait(until.elementLocated(By.css('h3>a')),10000);
        console.log(await firstResult.getText());
    } finally {
        await driver.quit();
    }
})();

See the Quick Tour for a full explanation of what goes on behind the scenes when you run this code. You should continue on to the narrative documentation to understand how you can install and successfully use Selenium as a test automation tool, and scaling simple tests like this to run in large, distributed environments on multiple browsers, on several different operating systems.

Getting started

If you are new to Selenium, we have a few resources that can help you get up to speed right away.

Narrative documentation

Narrative documentation in chapter form explaining how to use Selenium in detail, from bottom up.

Front matter