selenium-webdriver

What is selenium-webdriver?

The selenium-webdriver npm package is a browser automation library that provides an API for interacting with web browsers. It allows for the automation of web applications for testing purposes, but it's also used for automating web-based administration tasks. It supports multiple browsers including Chrome, Firefox, Internet Explorer, and Safari.

What are selenium-webdriver's main functionalities?

Browser Navigation

This feature allows for navigating to a web page. The code sample demonstrates how to open Firefox and navigate to Google's homepage.

const {Builder} = require('selenium-webdriver');
let driver = new Builder().forBrowser('firefox').build();
driver.get('http://www.google.com');

Element Interaction

This feature enables interaction with elements on a web page, such as input fields and buttons. The code sample shows how to find a search input by its name attribute and type 'selenium' into it.

const {Builder, By} = require('selenium-webdriver');
let driver = new Builder().forBrowser('firefox').build();
driver.findElement(By.name('q')).sendKeys('selenium');

Wait for Elements

This feature allows scripts to wait for elements to become available or visible on the page before interacting with them. The code sample demonstrates waiting up to 10 seconds for a search input to be located.

const {Builder, By, until} = require('selenium-webdriver');
let driver = new Builder().forBrowser('firefox').build();
driver.wait(until.elementLocated(By.name('q')), 10000);

Other packages similar to selenium-webdriver

puppeteer

Puppeteer is a Node library which provides a high-level API to control Chrome or Chromium over the DevTools Protocol. It is similar to selenium-webdriver but is specifically designed for Chrome and Chromium browsers. Puppeteer is often considered faster for browser automation tasks, especially with headless Chrome.

webdriverio

WebdriverIO is an automation library that wraps around the W3C WebDriver API. It provides a simpler API compared to selenium-webdriver and integrates well with modern testing frameworks. WebdriverIO supports both web and mobile browsers, making it a versatile choice for cross-platform testing.

nightwatch

Nightwatch.js is an automated testing framework for web applications and websites, written in Node.js. It uses the W3C WebDriver API for browser automation. It is designed to simplify the process of setting up continuous integration and writing automated tests. Nightwatch has a cleaner syntax compared to selenium-webdriver, which might be easier for beginners.

README

selenium-webdriver

Selenium is a browser automation library. Most often used for testing web-applications, Selenium may be used for any task that requires automating interaction with the browser.

Installation

Selenium supports Node 0.12.x and 4.x. Users on Node 0.12.x must run with the --harmony flag. Selenium may be installed via npm with

npm install selenium-webdriver

Out of the box, Selenium includes everything you need to work with Firefox. You will need to download additional components to work with the other major browsers. The drivers for Chrome, IE, PhantomJS, and Opera are all standalone executables that should be placed on your PATH. The SafariDriver browser extension should be installed in your browser before using Selenium; we recommend disabling the extension when using the browser without Selenium or installing the extension in a profile only used for testing.

Browser	Component
Chrome	chromedriver(.exe)
Internet Explorer	IEDriverServer.exe
PhantomJS	phantomjs(.exe)
Opera	operadriver(.exe)
Safari	SafariDriver.safariextz

Usage

The sample below and others are included in the example directory. You may also find the tests for selenium-webdriver informative.

var webdriver = require('selenium-webdriver'),
    By = require('selenium-webdriver').By,
    until = require('selenium-webdriver').until;

var driver = new webdriver.Builder()
    .forBrowser('firefox')
    .build();

driver.get('http://www.google.com/ncr');
driver.findElement(By.name('q')).sendKeys('webdriver');
driver.findElement(By.name('btnG')).click();
driver.wait(until.titleIs('webdriver - Google Search'), 1000);
driver.quit();

Using the Builder API

The Builder class is your one-stop shop for configuring new WebDriver instances. Rather than clutter your code with branches for the various browsers, the builder lets you set all options in one flow. When you call Builder#build(), all options irrelevant to the selected browser are dropped:

var webdriver = require('selenium-webdriver'),
    chrome = require('selenium-webdriver/chrome'),
    firefox = require('selenium-webdriver/firefox');

var driver = new webdriver.Builder()
    .forBrowser('firefox')
    .setChromeOptions(/* ... */)
    .setFirefoxOptions(/* ... */)
    .build();

Why would you want to configure options irrelevant to the target browser? The Builder's API defines your default configuration. You can change the target browser at runtime through the SELENIUM_BROWSER environment variable. For example, the example/google_search.js script is configured to run against Firefox. You can run the example against other browsers just by changing the runtime environment

# cd node_modules/selenium-webdriver
node example/google_search
SELENIUM_BROWSER=chrome node example/google_search
SELENIUM_BROWSER=safari node example/google_search

The Standalone Selenium Server

The standalone Selenium Server acts as a proxy between your script and the browser-specific drivers. The server may be used when running locally, but it's not recommend as it introduces an extra hop for each request and will slow things down. The server is required, however, to use a browser on a remote host (most browser drivers, like the IEDriverServer, do not accept remote connections).

To use the Selenium Server, you will need to install the JDK and download the latest server from Selenium. Once downloaded, run the server with

java -jar selenium-server-standalone-2.45.0.jar

You may configure your tests to run against a remote server through the Builder API:

var driver = new webdriver.Builder()
    .forBrowser('firefox')
    .usingServer('http://localhost:4444/wd/hub')
    .build();

Or change the Builder's configuration at runtime with the SELENIUM_REMOTE_URL environment variable:

SELENIUM_REMOTE_URL="http://localhost:4444/wd/hub" node script.js

You can experiment with these options using the example/google_search.js script provided with selenium-webdriver.

Documentation

API documentation is included in the docs directory and is also available online from the Selenium project. Addition resources include

• the #selenium channel on freenode IRC
• the [e-mail] list
• SeleniumHQ documentation

Contributing

Contributions are accepted either through GitHub pull requests or patches via the Selenium issue tracker. You must sign our Contributor License Agreement before your changes will be accepted.

Issues

Please report any issues using the Selenium issue tracker. When using the issue tracker

• Do include a detailed description of the problem.
• Do include a link to a gist with any interesting stack traces/logs (you may also attach these directly to the bug report).
• Do include a reduced test case. Reporting "unable to find element on the page" is not a valid report - there's nothing for us to look into. Expect your bug report to be closed if you do not provide enough information for us to investigate.
• Do not use the issue tracker to submit basic help requests. All help inquiries should be directed to the user forum or #selenium IRC channel.
• Do not post empty "I see this too" or "Any updates?" comments. These provide no additional information and clutter the log.
• Do not report regressions on closed bugs as they are not actively monitored for upates (especially bugs that are >6 months old). Please open a new issue and reference the original bug in your report.

License

Licensed to the Software Freedom Conservancy (SFC) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The SFC licenses this file to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.