WebDriver is an emerging standard which allows Web developers to write tests to automate Web browsers for site testing. It provides a programmable remote control for developing complex user scenarios and running them in an automated fashion against the website in a browser. Bing, Azure, SharePoint, Facebook, Google, and others use WebDriver to automate testing their sites within a browser.
Microsoft today announced the support for automated testing of Microsoft Edge through the W3C WebDriver standard. To use WebDriver with Microsoft Edge, you need the MicrosoftWebDriver server on a Windows Insiders build of 10166 or newer. So, developers can use the same regression testing as other browsers on Edge.
Read more about it here.