Step 1 - Enable Karma integration for Webstorm
Make a copy of Karma.conf.js, (name it .tmp so it is ignored by git) and add a specific version of angular.
Add a Karma Run Configuration
and use your new .tmp file as the Configuration file. Mine looks like this:
Click the Karma run button and your tests should run. You can change the browser that Karma is using in the .tmp config file. Note that debugging is only supported in Chrome and Firefox at the time of publishing.