How can I use Microsoft Edge browser?

I want to run my test case in Microsoft Edge browser when I run karma .
I know I can use firefox or chrome by set

  - xvfb

on using-xvfb-to-run-tests-that-require-a-gui guide.
But How can I use Microsoft Edge browser ?

Not officially supported, you need to install and set up all the stuff yourself.

New Chromium-based Edge supports headless mode and needs a matching webdriver just like Chrome. It’s not available for Linux as of this writing so use Windows or OSX images. Not preinstalled, either; for Windows, there’s a Chocolatey package.